./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe037.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe037.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe037.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe037.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:46:40,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:46:40,571 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:46:40,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:46:40,576 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:46:40,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:46:40,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:46:40,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:46:40,611 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:46:40,614 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:46:40,614 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:46:40,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:46:40,614 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:46:40,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:46:40,616 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:46:40,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:46:40,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:46:40,617 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:46:40,617 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:46:40,617 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:46:40,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:46:40,618 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:46:40,618 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:46:40,618 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:46:40,618 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:46:40,619 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:46:40,619 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:46:40,619 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:46:40,620 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:46:40,620 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:46:40,621 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:46:40,621 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:46:40,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:46:40,621 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:46:40,621 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:46:40,622 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:46:40,622 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:46:40,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:46:40,622 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:46:40,623 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:46:40,623 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:46:40,623 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:46:40,623 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:46:40,623 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:46:40,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:46:40,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:46:40,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:46:40,871 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:46:40,871 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:46:40,872 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe037.i [2024-05-12 10:46:41,960 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:46:42,148 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:46:42,148 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037.i [2024-05-12 10:46:42,182 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/931bfd2f8/79f9b3a6c6a544b9ac3dee01697929ee/FLAG311ed5589 [2024-05-12 10:46:42,196 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/931bfd2f8/79f9b3a6c6a544b9ac3dee01697929ee [2024-05-12 10:46:42,198 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:46:42,198 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:46:42,199 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe037.yml/witness.yml [2024-05-12 10:46:42,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:46:42,327 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:46:42,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:46:42,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:46:42,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:46:42,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:46:42" (1/2) ... [2024-05-12 10:46:42,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37cf9119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:46:42, skipping insertion in model container [2024-05-12 10:46:42,334 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:46:42" (1/2) ... [2024-05-12 10:46:42,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@570e5760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:46:42, skipping insertion in model container [2024-05-12 10:46:42,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:46:42" (2/2) ... [2024-05-12 10:46:42,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37cf9119 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:42, skipping insertion in model container [2024-05-12 10:46:42,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:46:42" (2/2) ... [2024-05-12 10:46:42,338 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:46:42,389 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:46:42,390 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 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 || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (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) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 10:46:42,390 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 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))) [2024-05-12 10:46:42,390 INFO L97 edCorrectnessWitness]: Location invariant before [L792-L792] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 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 || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (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) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 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))) [2024-05-12 10:46:42,391 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:46:42,391 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-05-12 10:46:42,431 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:46:42,659 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037.i[941,954] [2024-05-12 10:46:42,819 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:46:42,826 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:46:42,852 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037.i[941,954] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:46:42,970 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:46:43,014 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:46:43,014 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43 WrapperNode [2024-05-12 10:46:43,014 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:46:43,016 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:46:43,016 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:46:43,016 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:46:43,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,074 INFO L138 Inliner]: procedures = 176, calls = 59, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2024-05-12 10:46:43,075 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:46:43,080 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:46:43,080 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:46:43,080 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:46:43,088 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,091 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,107 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 10:46:43,107 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,108 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,114 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,115 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,118 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,121 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:46:43,124 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:46:43,124 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:46:43,124 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:46:43,125 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (1/1) ... [2024-05-12 10:46:43,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:46:43,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:46:43,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-05-12 10:46:43,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-05-12 10:46:43,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:46:43,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:46:43,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:46:43,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:46:43,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:46:43,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:46:43,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:46:43,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:46:43,198 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:46:43,199 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:46:43,199 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:46:43,199 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:46:43,200 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 10:46:43,200 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 10:46:43,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:46:43,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:46:43,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:46:43,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:46:43,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:46:43,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:46:43,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:46:43,204 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:46:43,315 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:46:43,316 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:46:43,551 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:46:43,551 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:46:43,647 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:46:43,647 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:46:43,648 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:46:43 BoogieIcfgContainer [2024-05-12 10:46:43,648 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:46:43,651 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:46:43,651 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:46:43,654 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:46:43,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:46:42" (1/4) ... [2024-05-12 10:46:43,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715f11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:46:43, skipping insertion in model container [2024-05-12 10:46:43,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:46:42" (2/4) ... [2024-05-12 10:46:43,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715f11e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:46:43, skipping insertion in model container [2024-05-12 10:46:43,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:46:43" (3/4) ... [2024-05-12 10:46:43,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715f11e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:46:43, skipping insertion in model container [2024-05-12 10:46:43,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:46:43" (4/4) ... [2024-05-12 10:46:43,658 INFO L112 eAbstractionObserver]: Analyzing ICFG safe037.i [2024-05-12 10:46:43,672 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:46:43,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 10:46:43,673 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:46:43,726 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:46:43,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 110 flow [2024-05-12 10:46:43,819 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2024-05-12 10:46:43,820 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:46:43,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 46 events. 1/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 75 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-05-12 10:46:43,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 110 flow [2024-05-12 10:46:43,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 43 transitions, 95 flow [2024-05-12 10:46:43,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:46:43,842 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;@78b3c044, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:46:43,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 10:46:43,845 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:46:43,845 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-05-12 10:46:43,845 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:46:43,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:43,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:46:43,846 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:43,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2039285960, now seen corresponding path program 1 times [2024-05-12 10:46:43,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:43,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554855708] [2024-05-12 10:46:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:43,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:44,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:44,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554855708] [2024-05-12 10:46:44,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554855708] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:44,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:44,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:46:44,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505227094] [2024-05-12 10:46:44,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:44,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:46:44,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:44,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:46:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:46:44,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-05-12 10:46:44,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:44,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:44,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-05-12 10:46:44,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:44,827 INFO L124 PetriNetUnfolderBase]: 759/1439 cut-off events. [2024-05-12 10:46:44,828 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-05-12 10:46:44,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 1439 events. 759/1439 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8764 event pairs, 534 based on Foata normal form. 1/1330 useless extension candidates. Maximal degree in co-relation 2630. Up to 1147 conditions per place. [2024-05-12 10:46:44,837 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 33 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-05-12 10:46:44,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 199 flow [2024-05-12 10:46:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:46:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:46:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-05-12 10:46:44,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7210884353741497 [2024-05-12 10:46:44,847 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 95 flow. Second operand 3 states and 106 transitions. [2024-05-12 10:46:44,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 199 flow [2024-05-12 10:46:44,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:46:44,851 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 122 flow [2024-05-12 10:46:44,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-05-12 10:46:44,854 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2024-05-12 10:46:44,854 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 122 flow [2024-05-12 10:46:44,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:44,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:44,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:44,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:46:44,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:44,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1248692585, now seen corresponding path program 1 times [2024-05-12 10:46:44,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:44,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206215086] [2024-05-12 10:46:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:44,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:45,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:45,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206215086] [2024-05-12 10:46:45,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206215086] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:45,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:45,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:46:45,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956041890] [2024-05-12 10:46:45,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:45,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:46:45,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:45,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:46:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:46:45,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-05-12 10:46:45,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:45,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:45,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-05-12 10:46:45,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:45,482 INFO L124 PetriNetUnfolderBase]: 937/1701 cut-off events. [2024-05-12 10:46:45,482 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-05-12 10:46:45,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3584 conditions, 1701 events. 937/1701 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10394 event pairs, 567 based on Foata normal form. 3/1639 useless extension candidates. Maximal degree in co-relation 3569. Up to 1383 conditions per place. [2024-05-12 10:46:45,493 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 43 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-05-12 10:46:45,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 276 flow [2024-05-12 10:46:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:46:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:46:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-05-12 10:46:45,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989795918367347 [2024-05-12 10:46:45,499 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 122 flow. Second operand 4 states and 137 transitions. [2024-05-12 10:46:45,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 276 flow [2024-05-12 10:46:45,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:46:45,502 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 158 flow [2024-05-12 10:46:45,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-05-12 10:46:45,507 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2024-05-12 10:46:45,508 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 158 flow [2024-05-12 10:46:45,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:45,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:45,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:45,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:46:45,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:45,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1667519794, now seen corresponding path program 1 times [2024-05-12 10:46:45,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:45,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025481127] [2024-05-12 10:46:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:45,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:45,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:45,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025481127] [2024-05-12 10:46:45,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025481127] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:45,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:45,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:46:45,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047756042] [2024-05-12 10:46:45,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:45,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:46:45,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:46:45,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:46:46,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-05-12 10:46:46,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:46,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:46,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-05-12 10:46:46,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:46,167 INFO L124 PetriNetUnfolderBase]: 958/1800 cut-off events. [2024-05-12 10:46:46,167 INFO L125 PetriNetUnfolderBase]: For 795/795 co-relation queries the response was YES. [2024-05-12 10:46:46,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 1800 events. 958/1800 cut-off events. For 795/795 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11163 event pairs, 449 based on Foata normal form. 2/1766 useless extension candidates. Maximal degree in co-relation 4134. Up to 1425 conditions per place. [2024-05-12 10:46:46,175 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 43 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-05-12 10:46:46,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 306 flow [2024-05-12 10:46:46,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:46:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:46:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-05-12 10:46:46,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-05-12 10:46:46,177 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 158 flow. Second operand 4 states and 133 transitions. [2024-05-12 10:46:46,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 306 flow [2024-05-12 10:46:46,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 292 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 10:46:46,179 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 184 flow [2024-05-12 10:46:46,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-05-12 10:46:46,180 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2024-05-12 10:46:46,180 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 184 flow [2024-05-12 10:46:46,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:46,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:46,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:46,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:46:46,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:46,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash -264112157, now seen corresponding path program 1 times [2024-05-12 10:46:46,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:46,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95557383] [2024-05-12 10:46:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:46,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:46,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:46,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95557383] [2024-05-12 10:46:46,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95557383] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:46,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:46,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:46:46,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364015474] [2024-05-12 10:46:46,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:46,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:46:46,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:46,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:46:46,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:46:46,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:46,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:46,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:46,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:46,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:46,776 INFO L124 PetriNetUnfolderBase]: 1184/2143 cut-off events. [2024-05-12 10:46:46,777 INFO L125 PetriNetUnfolderBase]: For 1683/1731 co-relation queries the response was YES. [2024-05-12 10:46:46,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5333 conditions, 2143 events. 1184/2143 cut-off events. For 1683/1731 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13247 event pairs, 462 based on Foata normal form. 6/2086 useless extension candidates. Maximal degree in co-relation 5315. Up to 1682 conditions per place. [2024-05-12 10:46:46,788 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 62 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2024-05-12 10:46:46,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 432 flow [2024-05-12 10:46:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:46:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:46:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-05-12 10:46:46,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-05-12 10:46:46,790 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 184 flow. Second operand 6 states and 194 transitions. [2024-05-12 10:46:46,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 432 flow [2024-05-12 10:46:46,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 416 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 10:46:46,793 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 227 flow [2024-05-12 10:46:46,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=227, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-05-12 10:46:46,793 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-05-12 10:46:46,793 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 227 flow [2024-05-12 10:46:46,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:46,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:46,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:46,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:46:46,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:46,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:46,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1296375697, now seen corresponding path program 1 times [2024-05-12 10:46:46,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:46,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127102727] [2024-05-12 10:46:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:46,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:47,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:47,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127102727] [2024-05-12 10:46:47,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127102727] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:47,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:47,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:46:47,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520897960] [2024-05-12 10:46:47,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:47,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:46:47,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:46:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:46:47,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:47,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:47,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:47,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:47,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:47,429 INFO L124 PetriNetUnfolderBase]: 1201/2155 cut-off events. [2024-05-12 10:46:47,429 INFO L125 PetriNetUnfolderBase]: For 2703/2753 co-relation queries the response was YES. [2024-05-12 10:46:47,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5869 conditions, 2155 events. 1201/2155 cut-off events. For 2703/2753 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13460 event pairs, 560 based on Foata normal form. 4/2099 useless extension candidates. Maximal degree in co-relation 5849. Up to 1722 conditions per place. [2024-05-12 10:46:47,441 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 57 selfloop transitions, 15 changer transitions 0/88 dead transitions. [2024-05-12 10:46:47,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 485 flow [2024-05-12 10:46:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:46:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:46:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-05-12 10:46:47,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-05-12 10:46:47,443 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 227 flow. Second operand 5 states and 165 transitions. [2024-05-12 10:46:47,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 88 transitions, 485 flow [2024-05-12 10:46:47,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 456 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 10:46:47,446 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 278 flow [2024-05-12 10:46:47,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-05-12 10:46:47,447 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2024-05-12 10:46:47,447 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 278 flow [2024-05-12 10:46:47,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:47,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:47,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:47,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:46:47,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:47,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:47,448 INFO L85 PathProgramCache]: Analyzing trace with hash 911147613, now seen corresponding path program 2 times [2024-05-12 10:46:47,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:47,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998835353] [2024-05-12 10:46:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:47,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:47,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:47,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998835353] [2024-05-12 10:46:47,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998835353] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:47,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:47,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:46:47,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8696663] [2024-05-12 10:46:47,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:47,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:46:47,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:47,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:46:47,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:46:47,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:47,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:47,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:47,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:47,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:48,053 INFO L124 PetriNetUnfolderBase]: 1196/2095 cut-off events. [2024-05-12 10:46:48,053 INFO L125 PetriNetUnfolderBase]: For 3726/3847 co-relation queries the response was YES. [2024-05-12 10:46:48,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6173 conditions, 2095 events. 1196/2095 cut-off events. For 3726/3847 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12662 event pairs, 395 based on Foata normal form. 40/2085 useless extension candidates. Maximal degree in co-relation 6152. Up to 1717 conditions per place. [2024-05-12 10:46:48,065 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 52 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-05-12 10:46:48,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 462 flow [2024-05-12 10:46:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:46:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:46:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-05-12 10:46:48,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-05-12 10:46:48,067 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 278 flow. Second operand 5 states and 160 transitions. [2024-05-12 10:46:48,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 462 flow [2024-05-12 10:46:48,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 83 transitions, 434 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-05-12 10:46:48,072 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 288 flow [2024-05-12 10:46:48,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2024-05-12 10:46:48,073 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-05-12 10:46:48,073 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 288 flow [2024-05-12 10:46:48,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:48,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:48,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:48,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:46:48,074 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:48,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2133032681, now seen corresponding path program 1 times [2024-05-12 10:46:48,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:48,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564444748] [2024-05-12 10:46:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:48,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564444748] [2024-05-12 10:46:48,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564444748] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:48,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:48,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:46:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431678032] [2024-05-12 10:46:48,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:48,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:46:48,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:46:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:46:48,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-05-12 10:46:48,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:48,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:48,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-05-12 10:46:48,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:48,677 INFO L124 PetriNetUnfolderBase]: 1156/2170 cut-off events. [2024-05-12 10:46:48,678 INFO L125 PetriNetUnfolderBase]: For 3817/3817 co-relation queries the response was YES. [2024-05-12 10:46:48,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6202 conditions, 2170 events. 1156/2170 cut-off events. For 3817/3817 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13797 event pairs, 411 based on Foata normal form. 1/2140 useless extension candidates. Maximal degree in co-relation 6179. Up to 1690 conditions per place. [2024-05-12 10:46:48,692 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 50 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-05-12 10:46:48,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 446 flow [2024-05-12 10:46:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:46:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:46:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-05-12 10:46:48,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-05-12 10:46:48,694 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 288 flow. Second operand 4 states and 128 transitions. [2024-05-12 10:46:48,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 446 flow [2024-05-12 10:46:48,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 77 transitions, 404 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 10:46:48,698 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 288 flow [2024-05-12 10:46:48,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-05-12 10:46:48,699 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 14 predicate places. [2024-05-12 10:46:48,699 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 288 flow [2024-05-12 10:46:48,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:48,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:48,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:48,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:46:48,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:48,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash -205518366, now seen corresponding path program 1 times [2024-05-12 10:46:48,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:48,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138583044] [2024-05-12 10:46:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:48,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:49,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138583044] [2024-05-12 10:46:49,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138583044] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:49,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:49,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:46:49,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729741013] [2024-05-12 10:46:49,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:49,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:46:49,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:49,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:46:49,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:46:49,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:49,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:49,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:49,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:49,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:49,406 INFO L124 PetriNetUnfolderBase]: 1207/2087 cut-off events. [2024-05-12 10:46:49,406 INFO L125 PetriNetUnfolderBase]: For 4951/5095 co-relation queries the response was YES. [2024-05-12 10:46:49,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6564 conditions, 2087 events. 1207/2087 cut-off events. For 4951/5095 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12417 event pairs, 361 based on Foata normal form. 16/2069 useless extension candidates. Maximal degree in co-relation 6541. Up to 1727 conditions per place. [2024-05-12 10:46:49,419 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 61 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-05-12 10:46:49,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 520 flow [2024-05-12 10:46:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:46:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:46:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-05-12 10:46:49,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653061224489796 [2024-05-12 10:46:49,421 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 288 flow. Second operand 5 states and 163 transitions. [2024-05-12 10:46:49,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 520 flow [2024-05-12 10:46:49,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 500 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-05-12 10:46:49,426 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 338 flow [2024-05-12 10:46:49,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=338, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-05-12 10:46:49,426 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 17 predicate places. [2024-05-12 10:46:49,427 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 338 flow [2024-05-12 10:46:49,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:49,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:49,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:49,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:46:49,427 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:49,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash -276503794, now seen corresponding path program 2 times [2024-05-12 10:46:49,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:49,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826520008] [2024-05-12 10:46:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:49,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:49,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:49,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826520008] [2024-05-12 10:46:49,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826520008] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:49,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:49,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:46:49,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392049111] [2024-05-12 10:46:49,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:49,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:46:49,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:46:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:46:49,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:49,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 338 flow. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:49,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:49,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:49,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:50,124 INFO L124 PetriNetUnfolderBase]: 1224/2123 cut-off events. [2024-05-12 10:46:50,125 INFO L125 PetriNetUnfolderBase]: For 6345/6531 co-relation queries the response was YES. [2024-05-12 10:46:50,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7137 conditions, 2123 events. 1224/2123 cut-off events. For 6345/6531 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12753 event pairs, 357 based on Foata normal form. 48/2144 useless extension candidates. Maximal degree in co-relation 7113. Up to 1697 conditions per place. [2024-05-12 10:46:50,134 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 78 selfloop transitions, 27 changer transitions 0/121 dead transitions. [2024-05-12 10:46:50,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 746 flow [2024-05-12 10:46:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:46:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:46:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 256 transitions. [2024-05-12 10:46:50,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-05-12 10:46:50,136 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 338 flow. Second operand 8 states and 256 transitions. [2024-05-12 10:46:50,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 746 flow [2024-05-12 10:46:50,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 700 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 10:46:50,142 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 420 flow [2024-05-12 10:46:50,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=420, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-05-12 10:46:50,143 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 21 predicate places. [2024-05-12 10:46:50,143 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 420 flow [2024-05-12 10:46:50,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:50,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:50,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:50,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:46:50,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:50,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1696377938, now seen corresponding path program 3 times [2024-05-12 10:46:50,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:50,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496726370] [2024-05-12 10:46:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:50,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:50,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:50,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496726370] [2024-05-12 10:46:50,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496726370] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:50,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:50,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:46:50,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147244438] [2024-05-12 10:46:50,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:50,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:46:50,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:50,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:46:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:46:50,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:50,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:50,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:50,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:50,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:50,861 INFO L124 PetriNetUnfolderBase]: 1219/2134 cut-off events. [2024-05-12 10:46:50,861 INFO L125 PetriNetUnfolderBase]: For 7481/7653 co-relation queries the response was YES. [2024-05-12 10:46:50,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7445 conditions, 2134 events. 1219/2134 cut-off events. For 7481/7653 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12872 event pairs, 394 based on Foata normal form. 46/2155 useless extension candidates. Maximal degree in co-relation 7421. Up to 1692 conditions per place. [2024-05-12 10:46:50,873 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 73 selfloop transitions, 27 changer transitions 0/116 dead transitions. [2024-05-12 10:46:50,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 116 transitions, 720 flow [2024-05-12 10:46:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:46:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:46:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 250 transitions. [2024-05-12 10:46:50,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6377551020408163 [2024-05-12 10:46:50,875 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 420 flow. Second operand 8 states and 250 transitions. [2024-05-12 10:46:50,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 116 transitions, 720 flow [2024-05-12 10:46:50,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 650 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 10:46:50,883 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 412 flow [2024-05-12 10:46:50,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=412, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-05-12 10:46:50,883 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-05-12 10:46:50,883 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 412 flow [2024-05-12 10:46:50,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:50,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:50,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:50,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:46:50,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:50,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1071985356, now seen corresponding path program 1 times [2024-05-12 10:46:50,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:50,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990756801] [2024-05-12 10:46:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:50,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:51,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:51,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990756801] [2024-05-12 10:46:51,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990756801] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:51,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:51,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:46:51,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460392494] [2024-05-12 10:46:51,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:51,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:46:51,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:51,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:46:51,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:46:51,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:51,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 412 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:51,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:51,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:51,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:51,494 INFO L124 PetriNetUnfolderBase]: 1286/2336 cut-off events. [2024-05-12 10:46:51,494 INFO L125 PetriNetUnfolderBase]: For 7660/7690 co-relation queries the response was YES. [2024-05-12 10:46:51,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7949 conditions, 2336 events. 1286/2336 cut-off events. For 7660/7690 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14508 event pairs, 362 based on Foata normal form. 4/2306 useless extension candidates. Maximal degree in co-relation 7923. Up to 1855 conditions per place. [2024-05-12 10:46:51,507 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 79 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2024-05-12 10:46:51,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 702 flow [2024-05-12 10:46:51,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:46:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:46:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-05-12 10:46:51,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-05-12 10:46:51,509 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 412 flow. Second operand 6 states and 187 transitions. [2024-05-12 10:46:51,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 702 flow [2024-05-12 10:46:51,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 636 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 10:46:51,516 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 429 flow [2024-05-12 10:46:51,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=429, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-05-12 10:46:51,516 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-05-12 10:46:51,516 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 429 flow [2024-05-12 10:46:51,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:51,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:51,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:51,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:46:51,517 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:51,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1668270656, now seen corresponding path program 1 times [2024-05-12 10:46:51,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:51,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822263399] [2024-05-12 10:46:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:51,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:51,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:51,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822263399] [2024-05-12 10:46:51,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822263399] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:51,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:51,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:46:51,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157164848] [2024-05-12 10:46:51,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:51,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:46:51,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:51,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:46:51,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:46:51,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:51,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 429 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:51,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:51,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:51,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:52,252 INFO L124 PetriNetUnfolderBase]: 1455/2597 cut-off events. [2024-05-12 10:46:52,252 INFO L125 PetriNetUnfolderBase]: For 10787/10795 co-relation queries the response was YES. [2024-05-12 10:46:52,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9142 conditions, 2597 events. 1455/2597 cut-off events. For 10787/10795 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16170 event pairs, 569 based on Foata normal form. 6/2586 useless extension candidates. Maximal degree in co-relation 9114. Up to 2089 conditions per place. [2024-05-12 10:46:52,266 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 74 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-05-12 10:46:52,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 733 flow [2024-05-12 10:46:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:46:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:46:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-05-12 10:46:52,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-05-12 10:46:52,267 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 429 flow. Second operand 5 states and 160 transitions. [2024-05-12 10:46:52,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 733 flow [2024-05-12 10:46:52,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 110 transitions, 694 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 10:46:52,279 INFO L231 Difference]: Finished difference. Result has 81 places, 88 transitions, 497 flow [2024-05-12 10:46:52,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=497, PETRI_PLACES=81, PETRI_TRANSITIONS=88} [2024-05-12 10:46:52,281 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 28 predicate places. [2024-05-12 10:46:52,281 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 88 transitions, 497 flow [2024-05-12 10:46:52,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:52,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:52,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:52,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:46:52,282 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:52,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:52,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1096704350, now seen corresponding path program 2 times [2024-05-12 10:46:52,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:52,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145435117] [2024-05-12 10:46:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:52,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:52,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145435117] [2024-05-12 10:46:52,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145435117] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:52,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:52,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:46:52,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065613098] [2024-05-12 10:46:52,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:52,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:46:52,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:52,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:46:52,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:46:52,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:52,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 88 transitions, 497 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:52,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:52,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:52,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:52,938 INFO L124 PetriNetUnfolderBase]: 1456/2547 cut-off events. [2024-05-12 10:46:52,939 INFO L125 PetriNetUnfolderBase]: For 12385/12389 co-relation queries the response was YES. [2024-05-12 10:46:52,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9460 conditions, 2547 events. 1456/2547 cut-off events. For 12385/12389 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15843 event pairs, 712 based on Foata normal form. 5/2514 useless extension candidates. Maximal degree in co-relation 9430. Up to 2086 conditions per place. [2024-05-12 10:46:52,954 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 67 selfloop transitions, 17 changer transitions 0/103 dead transitions. [2024-05-12 10:46:52,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 699 flow [2024-05-12 10:46:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:46:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:46:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-05-12 10:46:52,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6244897959183674 [2024-05-12 10:46:52,956 INFO L175 Difference]: Start difference. First operand has 81 places, 88 transitions, 497 flow. Second operand 5 states and 153 transitions. [2024-05-12 10:46:52,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 699 flow [2024-05-12 10:46:52,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 677 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-05-12 10:46:52,969 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 515 flow [2024-05-12 10:46:52,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=515, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-05-12 10:46:52,970 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 33 predicate places. [2024-05-12 10:46:52,970 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 515 flow [2024-05-12 10:46:52,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:52,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:52,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:52,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:46:52,971 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:52,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:52,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1104084396, now seen corresponding path program 1 times [2024-05-12 10:46:52,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:52,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905683596] [2024-05-12 10:46:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:52,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:53,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:53,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905683596] [2024-05-12 10:46:53,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905683596] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:53,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:53,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:46:53,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476939684] [2024-05-12 10:46:53,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:53,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:46:53,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:46:53,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:46:53,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:53,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 515 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:53,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:53,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:53,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:53,641 INFO L124 PetriNetUnfolderBase]: 1382/2475 cut-off events. [2024-05-12 10:46:53,641 INFO L125 PetriNetUnfolderBase]: For 11502/11582 co-relation queries the response was YES. [2024-05-12 10:46:53,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9165 conditions, 2475 events. 1382/2475 cut-off events. For 11502/11582 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15596 event pairs, 379 based on Foata normal form. 1/2429 useless extension candidates. Maximal degree in co-relation 9132. Up to 1982 conditions per place. [2024-05-12 10:46:53,659 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 77 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2024-05-12 10:46:53,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 807 flow [2024-05-12 10:46:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:46:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:46:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-05-12 10:46:53,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6408163265306123 [2024-05-12 10:46:53,660 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 515 flow. Second operand 5 states and 157 transitions. [2024-05-12 10:46:53,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 807 flow [2024-05-12 10:46:53,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 113 transitions, 770 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 10:46:53,674 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 560 flow [2024-05-12 10:46:53,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=560, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-05-12 10:46:53,675 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 35 predicate places. [2024-05-12 10:46:53,675 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 560 flow [2024-05-12 10:46:53,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:53,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:53,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:53,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:46:53,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:53,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:53,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1096697406, now seen corresponding path program 2 times [2024-05-12 10:46:53,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:53,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748218736] [2024-05-12 10:46:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:53,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:54,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:54,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748218736] [2024-05-12 10:46:54,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748218736] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:54,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:54,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:46:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65410134] [2024-05-12 10:46:54,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:54,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:46:54,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:54,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:46:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:46:54,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:54,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 560 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:54,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:54,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:54,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:54,339 INFO L124 PetriNetUnfolderBase]: 1377/2529 cut-off events. [2024-05-12 10:46:54,340 INFO L125 PetriNetUnfolderBase]: For 13300/13378 co-relation queries the response was YES. [2024-05-12 10:46:54,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9583 conditions, 2529 events. 1377/2529 cut-off events. For 13300/13378 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16233 event pairs, 578 based on Foata normal form. 1/2460 useless extension candidates. Maximal degree in co-relation 9549. Up to 1979 conditions per place. [2024-05-12 10:46:54,353 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 73 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2024-05-12 10:46:54,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 109 transitions, 774 flow [2024-05-12 10:46:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:46:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:46:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-05-12 10:46:54,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6244897959183674 [2024-05-12 10:46:54,354 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 560 flow. Second operand 5 states and 153 transitions. [2024-05-12 10:46:54,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 109 transitions, 774 flow [2024-05-12 10:46:54,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 109 transitions, 744 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-05-12 10:46:54,368 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 571 flow [2024-05-12 10:46:54,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=571, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2024-05-12 10:46:54,368 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-05-12 10:46:54,368 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 571 flow [2024-05-12 10:46:54,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:54,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:54,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:54,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:46:54,369 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:54,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:54,369 INFO L85 PathProgramCache]: Analyzing trace with hash 284066221, now seen corresponding path program 1 times [2024-05-12 10:46:54,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:54,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815858221] [2024-05-12 10:46:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:54,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:54,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:54,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815858221] [2024-05-12 10:46:54,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815858221] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:54,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:54,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:46:54,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336664332] [2024-05-12 10:46:54,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:54,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:46:54,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:54,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:46:54,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:46:54,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:54,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 571 flow. Second operand has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:54,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:54,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:54,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:55,247 INFO L124 PetriNetUnfolderBase]: 1675/2877 cut-off events. [2024-05-12 10:46:55,247 INFO L125 PetriNetUnfolderBase]: For 20249/20510 co-relation queries the response was YES. [2024-05-12 10:46:55,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11858 conditions, 2877 events. 1675/2877 cut-off events. For 20249/20510 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18017 event pairs, 321 based on Foata normal form. 48/2868 useless extension candidates. Maximal degree in co-relation 11822. Up to 2075 conditions per place. [2024-05-12 10:46:55,268 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 103 selfloop transitions, 20 changer transitions 0/142 dead transitions. [2024-05-12 10:46:55,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 142 transitions, 1031 flow [2024-05-12 10:46:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:46:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:46:55,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-05-12 10:46:55,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647230320699709 [2024-05-12 10:46:55,271 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 571 flow. Second operand 7 states and 228 transitions. [2024-05-12 10:46:55,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 142 transitions, 1031 flow [2024-05-12 10:46:55,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 142 transitions, 985 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 10:46:55,303 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 623 flow [2024-05-12 10:46:55,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=623, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-05-12 10:46:55,303 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 42 predicate places. [2024-05-12 10:46:55,304 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 623 flow [2024-05-12 10:46:55,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:55,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:55,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:55,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:46:55,304 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:55,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash 286923181, now seen corresponding path program 2 times [2024-05-12 10:46:55,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:55,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042187635] [2024-05-12 10:46:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:55,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:55,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:55,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042187635] [2024-05-12 10:46:55,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042187635] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:55,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:55,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:46:55,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636538812] [2024-05-12 10:46:55,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:55,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:46:55,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:55,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:46:55,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:46:55,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:55,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 623 flow. Second operand has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:55,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:55,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:55,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:56,183 INFO L124 PetriNetUnfolderBase]: 1649/2925 cut-off events. [2024-05-12 10:46:56,183 INFO L125 PetriNetUnfolderBase]: For 22386/22559 co-relation queries the response was YES. [2024-05-12 10:46:56,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11980 conditions, 2925 events. 1649/2925 cut-off events. For 22386/22559 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18783 event pairs, 657 based on Foata normal form. 48/2886 useless extension candidates. Maximal degree in co-relation 11943. Up to 2212 conditions per place. [2024-05-12 10:46:56,201 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 95 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2024-05-12 10:46:56,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 131 transitions, 943 flow [2024-05-12 10:46:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:46:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:46:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-05-12 10:46:56,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-05-12 10:46:56,202 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 623 flow. Second operand 6 states and 195 transitions. [2024-05-12 10:46:56,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 131 transitions, 943 flow [2024-05-12 10:46:56,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 131 transitions, 913 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-05-12 10:46:56,223 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 636 flow [2024-05-12 10:46:56,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=636, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2024-05-12 10:46:56,223 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 45 predicate places. [2024-05-12 10:46:56,224 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 636 flow [2024-05-12 10:46:56,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:56,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:56,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:56,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:46:56,224 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:56,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash 402214351, now seen corresponding path program 3 times [2024-05-12 10:46:56,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:56,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552416984] [2024-05-12 10:46:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:56,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:56,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:56,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552416984] [2024-05-12 10:46:56,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552416984] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:56,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:56,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:46:56,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203887136] [2024-05-12 10:46:56,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:56,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:46:56,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:56,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:46:56,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:46:56,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:56,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 636 flow. Second operand has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:56,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:56,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:56,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:57,148 INFO L124 PetriNetUnfolderBase]: 1749/3035 cut-off events. [2024-05-12 10:46:57,149 INFO L125 PetriNetUnfolderBase]: For 24414/24641 co-relation queries the response was YES. [2024-05-12 10:46:57,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12824 conditions, 3035 events. 1749/3035 cut-off events. For 24414/24641 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19580 event pairs, 498 based on Foata normal form. 64/3020 useless extension candidates. Maximal degree in co-relation 12785. Up to 2337 conditions per place. [2024-05-12 10:46:57,169 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 104 selfloop transitions, 30 changer transitions 0/153 dead transitions. [2024-05-12 10:46:57,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 153 transitions, 1070 flow [2024-05-12 10:46:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:46:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:46:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 285 transitions. [2024-05-12 10:46:57,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-05-12 10:46:57,171 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 636 flow. Second operand 9 states and 285 transitions. [2024-05-12 10:46:57,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 153 transitions, 1070 flow [2024-05-12 10:46:57,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 153 transitions, 1031 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 10:46:57,207 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 686 flow [2024-05-12 10:46:57,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=686, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2024-05-12 10:46:57,208 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 49 predicate places. [2024-05-12 10:46:57,208 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 686 flow [2024-05-12 10:46:57,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:57,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:57,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:57,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:46:57,209 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:57,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1868401229, now seen corresponding path program 4 times [2024-05-12 10:46:57,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:57,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222441405] [2024-05-12 10:46:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:57,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:57,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:57,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222441405] [2024-05-12 10:46:57,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222441405] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:57,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:57,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:46:57,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244839460] [2024-05-12 10:46:57,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:57,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:46:57,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:57,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:46:57,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:46:57,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:46:57,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 686 flow. Second operand has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:57,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:57,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:46:57,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:58,085 INFO L124 PetriNetUnfolderBase]: 1792/3097 cut-off events. [2024-05-12 10:46:58,086 INFO L125 PetriNetUnfolderBase]: For 27044/27285 co-relation queries the response was YES. [2024-05-12 10:46:58,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13315 conditions, 3097 events. 1792/3097 cut-off events. For 27044/27285 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19864 event pairs, 464 based on Foata normal form. 74/3103 useless extension candidates. Maximal degree in co-relation 13275. Up to 2412 conditions per place. [2024-05-12 10:46:58,105 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 102 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2024-05-12 10:46:58,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1110 flow [2024-05-12 10:46:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:46:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:46:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 281 transitions. [2024-05-12 10:46:58,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63718820861678 [2024-05-12 10:46:58,108 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 686 flow. Second operand 9 states and 281 transitions. [2024-05-12 10:46:58,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1110 flow [2024-05-12 10:46:58,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 151 transitions, 1045 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 10:46:58,135 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 712 flow [2024-05-12 10:46:58,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=712, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-05-12 10:46:58,136 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 51 predicate places. [2024-05-12 10:46:58,136 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 712 flow [2024-05-12 10:46:58,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:58,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:58,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:58,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:46:58,137 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:58,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:58,137 INFO L85 PathProgramCache]: Analyzing trace with hash -271357333, now seen corresponding path program 1 times [2024-05-12 10:46:58,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:58,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562200735] [2024-05-12 10:46:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:58,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:58,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:58,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562200735] [2024-05-12 10:46:58,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562200735] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:58,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:58,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:46:58,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699502317] [2024-05-12 10:46:58,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:46:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:46:58,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:46:58,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:46:58,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 712 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:58,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:58,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:46:58,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:58,950 INFO L124 PetriNetUnfolderBase]: 2073/3452 cut-off events. [2024-05-12 10:46:58,950 INFO L125 PetriNetUnfolderBase]: For 28861/28861 co-relation queries the response was YES. [2024-05-12 10:46:58,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14796 conditions, 3452 events. 2073/3452 cut-off events. For 28861/28861 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21522 event pairs, 523 based on Foata normal form. 4/3449 useless extension candidates. Maximal degree in co-relation 14755. Up to 2959 conditions per place. [2024-05-12 10:46:58,969 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 102 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2024-05-12 10:46:58,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 140 transitions, 1105 flow [2024-05-12 10:46:58,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:46:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:46:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-05-12 10:46:58,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239067055393586 [2024-05-12 10:46:58,971 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 712 flow. Second operand 7 states and 214 transitions. [2024-05-12 10:46:58,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 140 transitions, 1105 flow [2024-05-12 10:46:59,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1032 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 10:46:59,003 INFO L231 Difference]: Finished difference. Result has 105 places, 105 transitions, 763 flow [2024-05-12 10:46:59,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=763, PETRI_PLACES=105, PETRI_TRANSITIONS=105} [2024-05-12 10:46:59,003 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 52 predicate places. [2024-05-12 10:46:59,003 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 105 transitions, 763 flow [2024-05-12 10:46:59,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:59,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:59,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:59,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:46:59,004 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:59,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash -624676245, now seen corresponding path program 2 times [2024-05-12 10:46:59,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:59,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247486282] [2024-05-12 10:46:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:59,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:59,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:59,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247486282] [2024-05-12 10:46:59,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247486282] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:59,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:59,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:46:59,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535585803] [2024-05-12 10:46:59,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:59,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:46:59,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:46:59,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:46:59,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:46:59,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 105 transitions, 763 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:59,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:59,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:46:59,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:59,881 INFO L124 PetriNetUnfolderBase]: 2100/3659 cut-off events. [2024-05-12 10:46:59,882 INFO L125 PetriNetUnfolderBase]: For 31332/31332 co-relation queries the response was YES. [2024-05-12 10:46:59,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15393 conditions, 3659 events. 2100/3659 cut-off events. For 31332/31332 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 23812 event pairs, 836 based on Foata normal form. 4/3624 useless extension candidates. Maximal degree in co-relation 15350. Up to 3000 conditions per place. [2024-05-12 10:46:59,905 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 103 selfloop transitions, 28 changer transitions 0/146 dead transitions. [2024-05-12 10:46:59,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 146 transitions, 1183 flow [2024-05-12 10:46:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:46:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:46:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-05-12 10:46:59,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209912536443148 [2024-05-12 10:46:59,907 INFO L175 Difference]: Start difference. First operand has 105 places, 105 transitions, 763 flow. Second operand 7 states and 213 transitions. [2024-05-12 10:46:59,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 146 transitions, 1183 flow [2024-05-12 10:46:59,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 146 transitions, 1106 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 10:46:59,943 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 843 flow [2024-05-12 10:46:59,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=843, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-05-12 10:46:59,943 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 56 predicate places. [2024-05-12 10:46:59,943 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 843 flow [2024-05-12 10:46:59,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:59,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:59,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:59,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:46:59,944 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:59,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash -614200725, now seen corresponding path program 3 times [2024-05-12 10:46:59,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:59,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713955323] [2024-05-12 10:46:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:59,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:00,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:00,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713955323] [2024-05-12 10:47:00,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713955323] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:00,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:00,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:00,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333518501] [2024-05-12 10:47:00,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:00,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:00,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:00,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:00,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:00,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:00,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 843 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:00,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:00,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:00,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:00,740 INFO L124 PetriNetUnfolderBase]: 2092/3525 cut-off events. [2024-05-12 10:47:00,740 INFO L125 PetriNetUnfolderBase]: For 33036/33036 co-relation queries the response was YES. [2024-05-12 10:47:00,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15542 conditions, 3525 events. 2092/3525 cut-off events. For 33036/33036 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22287 event pairs, 456 based on Foata normal form. 4/3522 useless extension candidates. Maximal degree in co-relation 15497. Up to 2877 conditions per place. [2024-05-12 10:47:00,766 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 100 selfloop transitions, 35 changer transitions 0/150 dead transitions. [2024-05-12 10:47:00,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 150 transitions, 1249 flow [2024-05-12 10:47:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-05-12 10:47:00,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239067055393586 [2024-05-12 10:47:00,808 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 843 flow. Second operand 7 states and 214 transitions. [2024-05-12 10:47:00,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 150 transitions, 1249 flow [2024-05-12 10:47:00,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 1192 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-05-12 10:47:00,845 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 935 flow [2024-05-12 10:47:00,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=935, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2024-05-12 10:47:00,845 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 62 predicate places. [2024-05-12 10:47:00,846 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 935 flow [2024-05-12 10:47:00,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:00,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:00,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:00,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:47:00,847 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:00,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:00,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1071687327, now seen corresponding path program 1 times [2024-05-12 10:47:00,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:00,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10844744] [2024-05-12 10:47:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:00,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:01,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:01,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10844744] [2024-05-12 10:47:01,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10844744] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:01,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:01,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:01,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296256280] [2024-05-12 10:47:01,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:01,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:01,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:01,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:01,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:01,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 935 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:01,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:01,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:01,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:01,614 INFO L124 PetriNetUnfolderBase]: 2117/3575 cut-off events. [2024-05-12 10:47:01,614 INFO L125 PetriNetUnfolderBase]: For 36000/36000 co-relation queries the response was YES. [2024-05-12 10:47:01,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16111 conditions, 3575 events. 2117/3575 cut-off events. For 36000/36000 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 22660 event pairs, 535 based on Foata normal form. 1/3568 useless extension candidates. Maximal degree in co-relation 16064. Up to 3030 conditions per place. [2024-05-12 10:47:01,637 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 116 selfloop transitions, 31 changer transitions 0/162 dead transitions. [2024-05-12 10:47:01,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 162 transitions, 1499 flow [2024-05-12 10:47:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-05-12 10:47:01,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-05-12 10:47:01,640 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 935 flow. Second operand 6 states and 188 transitions. [2024-05-12 10:47:01,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 162 transitions, 1499 flow [2024-05-12 10:47:01,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 162 transitions, 1398 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-05-12 10:47:01,698 INFO L231 Difference]: Finished difference. Result has 119 places, 133 transitions, 1069 flow [2024-05-12 10:47:01,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1069, PETRI_PLACES=119, PETRI_TRANSITIONS=133} [2024-05-12 10:47:01,699 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 66 predicate places. [2024-05-12 10:47:01,699 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 133 transitions, 1069 flow [2024-05-12 10:47:01,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:01,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:01,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:01,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:47:01,700 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:01,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1185346431, now seen corresponding path program 2 times [2024-05-12 10:47:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:01,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465736324] [2024-05-12 10:47:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:02,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:02,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465736324] [2024-05-12 10:47:02,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465736324] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:02,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:02,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:02,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234643545] [2024-05-12 10:47:02,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:02,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:02,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:02,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:02,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:02,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:02,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 133 transitions, 1069 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:02,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:02,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:02,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:02,450 INFO L124 PetriNetUnfolderBase]: 2142/3625 cut-off events. [2024-05-12 10:47:02,450 INFO L125 PetriNetUnfolderBase]: For 39158/39158 co-relation queries the response was YES. [2024-05-12 10:47:02,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16711 conditions, 3625 events. 2142/3625 cut-off events. For 39158/39158 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23057 event pairs, 539 based on Foata normal form. 1/3615 useless extension candidates. Maximal degree in co-relation 16661. Up to 3057 conditions per place. [2024-05-12 10:47:02,475 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 113 selfloop transitions, 37 changer transitions 0/165 dead transitions. [2024-05-12 10:47:02,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 165 transitions, 1580 flow [2024-05-12 10:47:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-05-12 10:47:02,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-05-12 10:47:02,476 INFO L175 Difference]: Start difference. First operand has 119 places, 133 transitions, 1069 flow. Second operand 6 states and 185 transitions. [2024-05-12 10:47:02,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 165 transitions, 1580 flow [2024-05-12 10:47:02,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 165 transitions, 1532 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-05-12 10:47:02,541 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1164 flow [2024-05-12 10:47:02,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1164, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-05-12 10:47:02,542 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 72 predicate places. [2024-05-12 10:47:02,542 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1164 flow [2024-05-12 10:47:02,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:02,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:02,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:02,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:47:02,543 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:02,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:02,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1867417311, now seen corresponding path program 1 times [2024-05-12 10:47:02,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:02,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519600144] [2024-05-12 10:47:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:02,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:02,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:02,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519600144] [2024-05-12 10:47:02,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519600144] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:02,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:02,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:02,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345252044] [2024-05-12 10:47:02,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:02,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:02,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:02,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:02,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:02,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:47:02,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1164 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:02,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:02,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:47:02,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:03,326 INFO L124 PetriNetUnfolderBase]: 2052/3558 cut-off events. [2024-05-12 10:47:03,327 INFO L125 PetriNetUnfolderBase]: For 41955/41955 co-relation queries the response was YES. [2024-05-12 10:47:03,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16282 conditions, 3558 events. 2052/3558 cut-off events. For 41955/41955 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 23236 event pairs, 604 based on Foata normal form. 2/3533 useless extension candidates. Maximal degree in co-relation 16229. Up to 2864 conditions per place. [2024-05-12 10:47:03,353 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 112 selfloop transitions, 27 changer transitions 0/170 dead transitions. [2024-05-12 10:47:03,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 170 transitions, 1602 flow [2024-05-12 10:47:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-05-12 10:47:03,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-05-12 10:47:03,355 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1164 flow. Second operand 6 states and 188 transitions. [2024-05-12 10:47:03,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 170 transitions, 1602 flow [2024-05-12 10:47:03,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 170 transitions, 1547 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 10:47:03,431 INFO L231 Difference]: Finished difference. Result has 129 places, 145 transitions, 1232 flow [2024-05-12 10:47:03,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1232, PETRI_PLACES=129, PETRI_TRANSITIONS=145} [2024-05-12 10:47:03,432 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 76 predicate places. [2024-05-12 10:47:03,432 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 145 transitions, 1232 flow [2024-05-12 10:47:03,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:03,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:03,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:03,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:47:03,433 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:03,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash -992110751, now seen corresponding path program 3 times [2024-05-12 10:47:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:03,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433626008] [2024-05-12 10:47:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:03,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433626008] [2024-05-12 10:47:03,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433626008] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:03,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:03,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:03,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199958050] [2024-05-12 10:47:03,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:03,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:03,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:03,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:03,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:03,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 145 transitions, 1232 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:03,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:03,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:03,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:04,224 INFO L124 PetriNetUnfolderBase]: 2161/3649 cut-off events. [2024-05-12 10:47:04,224 INFO L125 PetriNetUnfolderBase]: For 44625/44625 co-relation queries the response was YES. [2024-05-12 10:47:04,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17264 conditions, 3649 events. 2161/3649 cut-off events. For 44625/44625 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23296 event pairs, 537 based on Foata normal form. 1/3641 useless extension candidates. Maximal degree in co-relation 17210. Up to 3084 conditions per place. [2024-05-12 10:47:04,253 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 119 selfloop transitions, 39 changer transitions 0/173 dead transitions. [2024-05-12 10:47:04,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 173 transitions, 1730 flow [2024-05-12 10:47:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-05-12 10:47:04,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-05-12 10:47:04,254 INFO L175 Difference]: Start difference. First operand has 129 places, 145 transitions, 1232 flow. Second operand 6 states and 185 transitions. [2024-05-12 10:47:04,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 173 transitions, 1730 flow [2024-05-12 10:47:04,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 173 transitions, 1679 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-05-12 10:47:04,312 INFO L231 Difference]: Finished difference. Result has 133 places, 147 transitions, 1291 flow [2024-05-12 10:47:04,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1291, PETRI_PLACES=133, PETRI_TRANSITIONS=147} [2024-05-12 10:47:04,312 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 80 predicate places. [2024-05-12 10:47:04,313 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 147 transitions, 1291 flow [2024-05-12 10:47:04,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:04,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:04,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:04,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:47:04,313 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:04,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:04,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1204919403, now seen corresponding path program 4 times [2024-05-12 10:47:04,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:04,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951476667] [2024-05-12 10:47:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:04,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:04,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:04,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951476667] [2024-05-12 10:47:04,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951476667] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:04,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:04,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:04,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111356059] [2024-05-12 10:47:04,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:04,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:04,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:04,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:04,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:04,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:04,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 147 transitions, 1291 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:04,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:04,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:04,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:05,112 INFO L124 PetriNetUnfolderBase]: 2172/3780 cut-off events. [2024-05-12 10:47:05,112 INFO L125 PetriNetUnfolderBase]: For 47911/47911 co-relation queries the response was YES. [2024-05-12 10:47:05,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17667 conditions, 3780 events. 2172/3780 cut-off events. For 47911/47911 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24643 event pairs, 608 based on Foata normal form. 1/3769 useless extension candidates. Maximal degree in co-relation 17611. Up to 3096 conditions per place. [2024-05-12 10:47:05,142 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 115 selfloop transitions, 43 changer transitions 0/173 dead transitions. [2024-05-12 10:47:05,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 173 transitions, 1754 flow [2024-05-12 10:47:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-05-12 10:47:05,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-05-12 10:47:05,144 INFO L175 Difference]: Start difference. First operand has 133 places, 147 transitions, 1291 flow. Second operand 6 states and 181 transitions. [2024-05-12 10:47:05,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 173 transitions, 1754 flow [2024-05-12 10:47:05,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 173 transitions, 1704 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-05-12 10:47:05,226 INFO L231 Difference]: Finished difference. Result has 138 places, 151 transitions, 1380 flow [2024-05-12 10:47:05,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1380, PETRI_PLACES=138, PETRI_TRANSITIONS=151} [2024-05-12 10:47:05,227 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 85 predicate places. [2024-05-12 10:47:05,227 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 151 transitions, 1380 flow [2024-05-12 10:47:05,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:05,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:05,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:05,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:47:05,228 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:05,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:05,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2012087137, now seen corresponding path program 5 times [2024-05-12 10:47:05,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:05,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818132215] [2024-05-12 10:47:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:05,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:05,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:05,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818132215] [2024-05-12 10:47:05,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818132215] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:05,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:05,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:05,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281380984] [2024-05-12 10:47:05,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:05,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:05,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:05,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:05,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:05,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:05,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 151 transitions, 1380 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:05,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:05,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:05,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:05,990 INFO L124 PetriNetUnfolderBase]: 2169/3693 cut-off events. [2024-05-12 10:47:05,991 INFO L125 PetriNetUnfolderBase]: For 50651/50651 co-relation queries the response was YES. [2024-05-12 10:47:06,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17659 conditions, 3693 events. 2169/3693 cut-off events. For 50651/50651 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23820 event pairs, 559 based on Foata normal form. 1/3679 useless extension candidates. Maximal degree in co-relation 17601. Up to 3093 conditions per place. [2024-05-12 10:47:06,023 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 112 selfloop transitions, 43 changer transitions 0/170 dead transitions. [2024-05-12 10:47:06,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 170 transitions, 1784 flow [2024-05-12 10:47:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:06,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 10:47:06,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-05-12 10:47:06,025 INFO L175 Difference]: Start difference. First operand has 138 places, 151 transitions, 1380 flow. Second operand 6 states and 178 transitions. [2024-05-12 10:47:06,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 170 transitions, 1784 flow [2024-05-12 10:47:06,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 170 transitions, 1720 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 10:47:06,114 INFO L231 Difference]: Finished difference. Result has 142 places, 151 transitions, 1408 flow [2024-05-12 10:47:06,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1408, PETRI_PLACES=142, PETRI_TRANSITIONS=151} [2024-05-12 10:47:06,115 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 89 predicate places. [2024-05-12 10:47:06,115 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 151 transitions, 1408 flow [2024-05-12 10:47:06,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:06,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:06,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:06,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:47:06,115 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:06,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1112957823, now seen corresponding path program 6 times [2024-05-12 10:47:06,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:06,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832892748] [2024-05-12 10:47:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:06,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:06,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:06,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832892748] [2024-05-12 10:47:06,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832892748] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:06,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:06,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:06,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672779792] [2024-05-12 10:47:06,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:06,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:06,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:06,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:06,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:06,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 151 transitions, 1408 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:06,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:06,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:06,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:06,896 INFO L124 PetriNetUnfolderBase]: 2166/3659 cut-off events. [2024-05-12 10:47:06,897 INFO L125 PetriNetUnfolderBase]: For 52813/52813 co-relation queries the response was YES. [2024-05-12 10:47:06,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17696 conditions, 3659 events. 2166/3659 cut-off events. For 52813/52813 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23430 event pairs, 546 based on Foata normal form. 1/3647 useless extension candidates. Maximal degree in co-relation 17637. Up to 3090 conditions per place. [2024-05-12 10:47:06,924 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 111 selfloop transitions, 43 changer transitions 0/169 dead transitions. [2024-05-12 10:47:06,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 169 transitions, 1756 flow [2024-05-12 10:47:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:47:06,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-05-12 10:47:06,925 INFO L175 Difference]: Start difference. First operand has 142 places, 151 transitions, 1408 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:47:06,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 169 transitions, 1756 flow [2024-05-12 10:47:06,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 169 transitions, 1658 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 10:47:06,986 INFO L231 Difference]: Finished difference. Result has 144 places, 151 transitions, 1402 flow [2024-05-12 10:47:06,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1402, PETRI_PLACES=144, PETRI_TRANSITIONS=151} [2024-05-12 10:47:06,987 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 91 predicate places. [2024-05-12 10:47:06,987 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 151 transitions, 1402 flow [2024-05-12 10:47:06,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:06,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:06,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:06,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:47:06,988 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:06,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash -800420843, now seen corresponding path program 2 times [2024-05-12 10:47:06,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:06,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623979555] [2024-05-12 10:47:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:06,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:07,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:07,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623979555] [2024-05-12 10:47:07,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623979555] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:07,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:07,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:07,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086321756] [2024-05-12 10:47:07,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:07,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:07,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:07,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:07,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:47:07,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 151 transitions, 1402 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:07,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:07,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:47:07,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:07,788 INFO L124 PetriNetUnfolderBase]: 2065/3644 cut-off events. [2024-05-12 10:47:07,788 INFO L125 PetriNetUnfolderBase]: For 57052/57056 co-relation queries the response was YES. [2024-05-12 10:47:07,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17316 conditions, 3644 events. 2065/3644 cut-off events. For 57052/57056 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24383 event pairs, 832 based on Foata normal form. 6/3600 useless extension candidates. Maximal degree in co-relation 17257. Up to 2886 conditions per place. [2024-05-12 10:47:07,815 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 109 selfloop transitions, 30 changer transitions 0/173 dead transitions. [2024-05-12 10:47:07,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 173 transitions, 1810 flow [2024-05-12 10:47:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-05-12 10:47:07,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 10:47:07,817 INFO L175 Difference]: Start difference. First operand has 144 places, 151 transitions, 1402 flow. Second operand 6 states and 182 transitions. [2024-05-12 10:47:07,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 173 transitions, 1810 flow [2024-05-12 10:47:07,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 173 transitions, 1764 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:47:07,890 INFO L231 Difference]: Finished difference. Result has 148 places, 154 transitions, 1455 flow [2024-05-12 10:47:07,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1455, PETRI_PLACES=148, PETRI_TRANSITIONS=154} [2024-05-12 10:47:07,891 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 95 predicate places. [2024-05-12 10:47:07,891 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 154 transitions, 1455 flow [2024-05-12 10:47:07,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:07,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:07,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:07,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:47:07,891 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:07,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:07,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1128203871, now seen corresponding path program 3 times [2024-05-12 10:47:07,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:07,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772442049] [2024-05-12 10:47:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:07,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:08,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:08,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772442049] [2024-05-12 10:47:08,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772442049] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:08,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:08,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:08,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23281072] [2024-05-12 10:47:08,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:08,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:08,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:08,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:08,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:08,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:47:08,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 1455 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:08,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:08,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:47:08,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:08,714 INFO L124 PetriNetUnfolderBase]: 2063/3566 cut-off events. [2024-05-12 10:47:08,715 INFO L125 PetriNetUnfolderBase]: For 57987/57987 co-relation queries the response was YES. [2024-05-12 10:47:08,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17258 conditions, 3566 events. 2063/3566 cut-off events. For 57987/57987 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23225 event pairs, 511 based on Foata normal form. 2/3551 useless extension candidates. Maximal degree in co-relation 17198. Up to 2938 conditions per place. [2024-05-12 10:47:08,745 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 125 selfloop transitions, 13 changer transitions 0/172 dead transitions. [2024-05-12 10:47:08,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 172 transitions, 1771 flow [2024-05-12 10:47:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:47:08,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-05-12 10:47:08,750 INFO L175 Difference]: Start difference. First operand has 148 places, 154 transitions, 1455 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:47:08,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 172 transitions, 1771 flow [2024-05-12 10:47:08,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 172 transitions, 1673 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-05-12 10:47:08,818 INFO L231 Difference]: Finished difference. Result has 150 places, 154 transitions, 1389 flow [2024-05-12 10:47:08,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1389, PETRI_PLACES=150, PETRI_TRANSITIONS=154} [2024-05-12 10:47:08,818 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 97 predicate places. [2024-05-12 10:47:08,819 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 154 transitions, 1389 flow [2024-05-12 10:47:08,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:08,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:08,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:08,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:47:08,820 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:08,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:08,820 INFO L85 PathProgramCache]: Analyzing trace with hash -996417953, now seen corresponding path program 1 times [2024-05-12 10:47:08,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:08,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287358351] [2024-05-12 10:47:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:08,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:09,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:09,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287358351] [2024-05-12 10:47:09,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287358351] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:09,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:09,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:09,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305699251] [2024-05-12 10:47:09,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:09,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:09,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:09,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:09,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:09,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:47:09,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 154 transitions, 1389 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:09,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:09,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:47:09,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:09,634 INFO L124 PetriNetUnfolderBase]: 2044/3675 cut-off events. [2024-05-12 10:47:09,634 INFO L125 PetriNetUnfolderBase]: For 51825/51931 co-relation queries the response was YES. [2024-05-12 10:47:09,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17007 conditions, 3675 events. 2044/3675 cut-off events. For 51825/51931 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 24746 event pairs, 748 based on Foata normal form. 1/3590 useless extension candidates. Maximal degree in co-relation 16946. Up to 2951 conditions per place. [2024-05-12 10:47:09,660 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 139 selfloop transitions, 13 changer transitions 0/181 dead transitions. [2024-05-12 10:47:09,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 181 transitions, 1779 flow [2024-05-12 10:47:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-05-12 10:47:09,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-05-12 10:47:09,661 INFO L175 Difference]: Start difference. First operand has 150 places, 154 transitions, 1389 flow. Second operand 6 states and 183 transitions. [2024-05-12 10:47:09,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 181 transitions, 1779 flow [2024-05-12 10:47:09,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 181 transitions, 1718 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 10:47:09,746 INFO L231 Difference]: Finished difference. Result has 149 places, 157 transitions, 1396 flow [2024-05-12 10:47:09,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1396, PETRI_PLACES=149, PETRI_TRANSITIONS=157} [2024-05-12 10:47:09,747 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 96 predicate places. [2024-05-12 10:47:09,747 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 157 transitions, 1396 flow [2024-05-12 10:47:09,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:09,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:09,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:09,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:47:09,748 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:09,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash -991656353, now seen corresponding path program 2 times [2024-05-12 10:47:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15513070] [2024-05-12 10:47:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:10,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:10,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15513070] [2024-05-12 10:47:10,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15513070] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:10,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:10,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:10,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613290113] [2024-05-12 10:47:10,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:10,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:10,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:10,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:10,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:10,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:47:10,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 157 transitions, 1396 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:10,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:10,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:47:10,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:10,597 INFO L124 PetriNetUnfolderBase]: 2074/3702 cut-off events. [2024-05-12 10:47:10,597 INFO L125 PetriNetUnfolderBase]: For 55179/55341 co-relation queries the response was YES. [2024-05-12 10:47:10,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17608 conditions, 3702 events. 2074/3702 cut-off events. For 55179/55341 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24819 event pairs, 712 based on Foata normal form. 3/3629 useless extension candidates. Maximal degree in co-relation 17548. Up to 2937 conditions per place. [2024-05-12 10:47:10,625 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 126 selfloop transitions, 30 changer transitions 0/185 dead transitions. [2024-05-12 10:47:10,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 185 transitions, 1892 flow [2024-05-12 10:47:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-05-12 10:47:10,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-05-12 10:47:10,627 INFO L175 Difference]: Start difference. First operand has 149 places, 157 transitions, 1396 flow. Second operand 6 states and 185 transitions. [2024-05-12 10:47:10,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 185 transitions, 1892 flow [2024-05-12 10:47:10,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 185 transitions, 1846 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 10:47:10,714 INFO L231 Difference]: Finished difference. Result has 151 places, 163 transitions, 1495 flow [2024-05-12 10:47:10,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1495, PETRI_PLACES=151, PETRI_TRANSITIONS=163} [2024-05-12 10:47:10,714 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 98 predicate places. [2024-05-12 10:47:10,714 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 163 transitions, 1495 flow [2024-05-12 10:47:10,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:10,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:10,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:10,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:47:10,715 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:10,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:10,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1659170239, now seen corresponding path program 3 times [2024-05-12 10:47:10,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:10,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048925736] [2024-05-12 10:47:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:10,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:11,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048925736] [2024-05-12 10:47:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048925736] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:11,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:11,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:11,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587401323] [2024-05-12 10:47:11,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:11,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:11,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:11,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:11,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:47:11,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 163 transitions, 1495 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:11,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:11,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:47:11,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:11,514 INFO L124 PetriNetUnfolderBase]: 2057/3689 cut-off events. [2024-05-12 10:47:11,514 INFO L125 PetriNetUnfolderBase]: For 59089/59265 co-relation queries the response was YES. [2024-05-12 10:47:11,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17871 conditions, 3689 events. 2057/3689 cut-off events. For 59089/59265 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24926 event pairs, 746 based on Foata normal form. 4/3608 useless extension candidates. Maximal degree in co-relation 17810. Up to 2923 conditions per place. [2024-05-12 10:47:11,638 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 122 selfloop transitions, 30 changer transitions 0/181 dead transitions. [2024-05-12 10:47:11,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 181 transitions, 1839 flow [2024-05-12 10:47:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-05-12 10:47:11,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-05-12 10:47:11,639 INFO L175 Difference]: Start difference. First operand has 151 places, 163 transitions, 1495 flow. Second operand 6 states and 181 transitions. [2024-05-12 10:47:11,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 181 transitions, 1839 flow [2024-05-12 10:47:11,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 181 transitions, 1773 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-05-12 10:47:11,736 INFO L231 Difference]: Finished difference. Result has 155 places, 163 transitions, 1496 flow [2024-05-12 10:47:11,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1496, PETRI_PLACES=155, PETRI_TRANSITIONS=163} [2024-05-12 10:47:11,737 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 102 predicate places. [2024-05-12 10:47:11,737 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 163 transitions, 1496 flow [2024-05-12 10:47:11,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:11,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:11,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:11,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:47:11,738 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:11,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1128221727, now seen corresponding path program 1 times [2024-05-12 10:47:11,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:11,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176269142] [2024-05-12 10:47:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:11,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:12,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:12,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176269142] [2024-05-12 10:47:12,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176269142] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:12,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:12,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:47:12,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851469461] [2024-05-12 10:47:12,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:12,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:47:12,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:12,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:47:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:47:12,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:47:12,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 163 transitions, 1496 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:12,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:12,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:47:12,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:12,557 INFO L124 PetriNetUnfolderBase]: 2096/3630 cut-off events. [2024-05-12 10:47:12,557 INFO L125 PetriNetUnfolderBase]: For 69694/69694 co-relation queries the response was YES. [2024-05-12 10:47:12,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18292 conditions, 3630 events. 2096/3630 cut-off events. For 69694/69694 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23768 event pairs, 514 based on Foata normal form. 2/3614 useless extension candidates. Maximal degree in co-relation 18229. Up to 2976 conditions per place. [2024-05-12 10:47:12,587 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 138 selfloop transitions, 12 changer transitions 0/184 dead transitions. [2024-05-12 10:47:12,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 184 transitions, 1868 flow [2024-05-12 10:47:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:47:12,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-05-12 10:47:12,589 INFO L175 Difference]: Start difference. First operand has 155 places, 163 transitions, 1496 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:47:12,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 184 transitions, 1868 flow [2024-05-12 10:47:12,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 184 transitions, 1787 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 10:47:12,671 INFO L231 Difference]: Finished difference. Result has 156 places, 165 transitions, 1478 flow [2024-05-12 10:47:12,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1478, PETRI_PLACES=156, PETRI_TRANSITIONS=165} [2024-05-12 10:47:12,672 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 103 predicate places. [2024-05-12 10:47:12,672 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 165 transitions, 1478 flow [2024-05-12 10:47:12,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:12,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:12,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:12,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:47:12,672 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:12,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1835476490, now seen corresponding path program 1 times [2024-05-12 10:47:12,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:12,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264582465] [2024-05-12 10:47:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:12,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:13,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:13,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264582465] [2024-05-12 10:47:13,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264582465] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:13,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:13,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:13,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715679611] [2024-05-12 10:47:13,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:13,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:13,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:13,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:13,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:13,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 165 transitions, 1478 flow. Second operand has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:13,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:13,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:13,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:13,697 INFO L124 PetriNetUnfolderBase]: 2416/4119 cut-off events. [2024-05-12 10:47:13,698 INFO L125 PetriNetUnfolderBase]: For 79637/79637 co-relation queries the response was YES. [2024-05-12 10:47:13,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20661 conditions, 4119 events. 2416/4119 cut-off events. For 79637/79637 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 27063 event pairs, 573 based on Foata normal form. 12/4106 useless extension candidates. Maximal degree in co-relation 20597. Up to 3002 conditions per place. [2024-05-12 10:47:13,736 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 182 selfloop transitions, 47 changer transitions 0/244 dead transitions. [2024-05-12 10:47:13,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 244 transitions, 2236 flow [2024-05-12 10:47:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:47:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:47:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 338 transitions. [2024-05-12 10:47:13,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62708719851577 [2024-05-12 10:47:13,738 INFO L175 Difference]: Start difference. First operand has 156 places, 165 transitions, 1478 flow. Second operand 11 states and 338 transitions. [2024-05-12 10:47:13,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 244 transitions, 2236 flow [2024-05-12 10:47:13,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 244 transitions, 2189 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 10:47:13,868 INFO L231 Difference]: Finished difference. Result has 165 places, 173 transitions, 1651 flow [2024-05-12 10:47:13,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1651, PETRI_PLACES=165, PETRI_TRANSITIONS=173} [2024-05-12 10:47:13,869 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 112 predicate places. [2024-05-12 10:47:13,869 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 173 transitions, 1651 flow [2024-05-12 10:47:13,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:13,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:13,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:13,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 10:47:13,869 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:13,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:13,870 INFO L85 PathProgramCache]: Analyzing trace with hash 237666064, now seen corresponding path program 2 times [2024-05-12 10:47:13,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:13,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002561204] [2024-05-12 10:47:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:13,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:14,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002561204] [2024-05-12 10:47:14,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002561204] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:14,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:14,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:14,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165493353] [2024-05-12 10:47:14,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:14,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:14,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:14,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 173 transitions, 1651 flow. Second operand has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:14,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:14,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:14,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:14,914 INFO L124 PetriNetUnfolderBase]: 2594/4514 cut-off events. [2024-05-12 10:47:14,915 INFO L125 PetriNetUnfolderBase]: For 88822/88822 co-relation queries the response was YES. [2024-05-12 10:47:14,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22921 conditions, 4514 events. 2594/4514 cut-off events. For 88822/88822 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30495 event pairs, 621 based on Foata normal form. 12/4519 useless extension candidates. Maximal degree in co-relation 22854. Up to 3411 conditions per place. [2024-05-12 10:47:14,953 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 188 selfloop transitions, 49 changer transitions 0/252 dead transitions. [2024-05-12 10:47:14,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 252 transitions, 2408 flow [2024-05-12 10:47:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:47:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:47:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 363 transitions. [2024-05-12 10:47:14,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6173469387755102 [2024-05-12 10:47:14,955 INFO L175 Difference]: Start difference. First operand has 165 places, 173 transitions, 1651 flow. Second operand 12 states and 363 transitions. [2024-05-12 10:47:14,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 252 transitions, 2408 flow [2024-05-12 10:47:15,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 252 transitions, 2260 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-05-12 10:47:15,137 INFO L231 Difference]: Finished difference. Result has 171 places, 179 transitions, 1706 flow [2024-05-12 10:47:15,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1706, PETRI_PLACES=171, PETRI_TRANSITIONS=179} [2024-05-12 10:47:15,138 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 118 predicate places. [2024-05-12 10:47:15,138 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 179 transitions, 1706 flow [2024-05-12 10:47:15,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:15,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:15,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:15,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 10:47:15,139 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:15,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash 981575178, now seen corresponding path program 3 times [2024-05-12 10:47:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:15,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864781542] [2024-05-12 10:47:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:15,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:15,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:15,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864781542] [2024-05-12 10:47:15,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864781542] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:15,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:15,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:15,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686145891] [2024-05-12 10:47:15,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:15,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:15,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:15,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:15,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:15,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:15,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 179 transitions, 1706 flow. Second operand has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:15,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:15,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:15,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:16,236 INFO L124 PetriNetUnfolderBase]: 2728/4666 cut-off events. [2024-05-12 10:47:16,237 INFO L125 PetriNetUnfolderBase]: For 94682/94682 co-relation queries the response was YES. [2024-05-12 10:47:16,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24126 conditions, 4666 events. 2728/4666 cut-off events. For 94682/94682 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 31452 event pairs, 583 based on Foata normal form. 12/4673 useless extension candidates. Maximal degree in co-relation 24056. Up to 3629 conditions per place. [2024-05-12 10:47:16,280 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 188 selfloop transitions, 53 changer transitions 0/256 dead transitions. [2024-05-12 10:47:16,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 256 transitions, 2458 flow [2024-05-12 10:47:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:47:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:47:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 360 transitions. [2024-05-12 10:47:16,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-05-12 10:47:16,283 INFO L175 Difference]: Start difference. First operand has 171 places, 179 transitions, 1706 flow. Second operand 12 states and 360 transitions. [2024-05-12 10:47:16,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 256 transitions, 2458 flow [2024-05-12 10:47:16,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 256 transitions, 2334 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-05-12 10:47:16,453 INFO L231 Difference]: Finished difference. Result has 176 places, 183 transitions, 1772 flow [2024-05-12 10:47:16,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1772, PETRI_PLACES=176, PETRI_TRANSITIONS=183} [2024-05-12 10:47:16,453 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 123 predicate places. [2024-05-12 10:47:16,454 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 183 transitions, 1772 flow [2024-05-12 10:47:16,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:16,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:16,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:16,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 10:47:16,454 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:16,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1836351990, now seen corresponding path program 4 times [2024-05-12 10:47:16,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:16,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607695098] [2024-05-12 10:47:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:16,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:16,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:16,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607695098] [2024-05-12 10:47:16,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607695098] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:16,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:16,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:16,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193879689] [2024-05-12 10:47:16,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:16,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:16,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:16,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:16,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:16,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:16,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 183 transitions, 1772 flow. Second operand has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:16,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:16,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:16,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:17,585 INFO L124 PetriNetUnfolderBase]: 2708/4618 cut-off events. [2024-05-12 10:47:17,585 INFO L125 PetriNetUnfolderBase]: For 92506/92506 co-relation queries the response was YES. [2024-05-12 10:47:17,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23576 conditions, 4618 events. 2708/4618 cut-off events. For 92506/92506 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 31034 event pairs, 502 based on Foata normal form. 12/4625 useless extension candidates. Maximal degree in co-relation 23504. Up to 2793 conditions per place. [2024-05-12 10:47:17,628 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 172 selfloop transitions, 63 changer transitions 0/250 dead transitions. [2024-05-12 10:47:17,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 250 transitions, 2392 flow [2024-05-12 10:47:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:47:17,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:47:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 332 transitions. [2024-05-12 10:47:17,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159554730983302 [2024-05-12 10:47:17,630 INFO L175 Difference]: Start difference. First operand has 176 places, 183 transitions, 1772 flow. Second operand 11 states and 332 transitions. [2024-05-12 10:47:17,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 250 transitions, 2392 flow [2024-05-12 10:47:17,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 250 transitions, 2281 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-05-12 10:47:17,831 INFO L231 Difference]: Finished difference. Result has 179 places, 182 transitions, 1751 flow [2024-05-12 10:47:17,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1751, PETRI_PLACES=179, PETRI_TRANSITIONS=182} [2024-05-12 10:47:17,832 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 126 predicate places. [2024-05-12 10:47:17,832 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 182 transitions, 1751 flow [2024-05-12 10:47:17,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:17,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:17,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:17,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 10:47:17,833 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:17,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:17,833 INFO L85 PathProgramCache]: Analyzing trace with hash -415779330, now seen corresponding path program 1 times [2024-05-12 10:47:17,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:17,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046667593] [2024-05-12 10:47:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:17,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:17,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:17,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046667593] [2024-05-12 10:47:17,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046667593] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:17,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:17,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:47:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561644568] [2024-05-12 10:47:17,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:17,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:47:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:17,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:47:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:47:17,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 49 [2024-05-12 10:47:17,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 182 transitions, 1751 flow. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:17,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:17,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 49 [2024-05-12 10:47:17,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:18,320 INFO L124 PetriNetUnfolderBase]: 1761/3853 cut-off events. [2024-05-12 10:47:18,321 INFO L125 PetriNetUnfolderBase]: For 39556/40029 co-relation queries the response was YES. [2024-05-12 10:47:18,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14866 conditions, 3853 events. 1761/3853 cut-off events. For 39556/40029 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 31519 event pairs, 314 based on Foata normal form. 160/3716 useless extension candidates. Maximal degree in co-relation 14793. Up to 1615 conditions per place. [2024-05-12 10:47:18,356 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 32 selfloop transitions, 38 changer transitions 0/199 dead transitions. [2024-05-12 10:47:18,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 199 transitions, 1993 flow [2024-05-12 10:47:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:47:18,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:47:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-05-12 10:47:18,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-05-12 10:47:18,358 INFO L175 Difference]: Start difference. First operand has 179 places, 182 transitions, 1751 flow. Second operand 4 states and 147 transitions. [2024-05-12 10:47:18,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 199 transitions, 1993 flow [2024-05-12 10:47:18,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 199 transitions, 1824 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-05-12 10:47:18,430 INFO L231 Difference]: Finished difference. Result has 174 places, 186 transitions, 1784 flow [2024-05-12 10:47:18,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1784, PETRI_PLACES=174, PETRI_TRANSITIONS=186} [2024-05-12 10:47:18,431 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 121 predicate places. [2024-05-12 10:47:18,431 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 186 transitions, 1784 flow [2024-05-12 10:47:18,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:18,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:18,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:18,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 10:47:18,432 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:18,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:18,432 INFO L85 PathProgramCache]: Analyzing trace with hash 717835584, now seen corresponding path program 1 times [2024-05-12 10:47:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:18,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574899354] [2024-05-12 10:47:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:18,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:18,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574899354] [2024-05-12 10:47:18,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574899354] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:18,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:18,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:47:18,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484525472] [2024-05-12 10:47:18,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:18,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:47:18,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:18,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:47:18,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:47:19,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:19,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 186 transitions, 1784 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:19,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:19,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:19,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:19,641 INFO L124 PetriNetUnfolderBase]: 2687/4773 cut-off events. [2024-05-12 10:47:19,641 INFO L125 PetriNetUnfolderBase]: For 93134/93140 co-relation queries the response was YES. [2024-05-12 10:47:19,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24711 conditions, 4773 events. 2687/4773 cut-off events. For 93134/93140 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33205 event pairs, 985 based on Foata normal form. 1/4638 useless extension candidates. Maximal degree in co-relation 24637. Up to 4069 conditions per place. [2024-05-12 10:47:19,681 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 157 selfloop transitions, 40 changer transitions 0/213 dead transitions. [2024-05-12 10:47:19,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 213 transitions, 2378 flow [2024-05-12 10:47:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 10:47:19,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-05-12 10:47:19,683 INFO L175 Difference]: Start difference. First operand has 174 places, 186 transitions, 1784 flow. Second operand 6 states and 179 transitions. [2024-05-12 10:47:19,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 213 transitions, 2378 flow [2024-05-12 10:47:19,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 213 transitions, 2376 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:47:19,870 INFO L231 Difference]: Finished difference. Result has 180 places, 193 transitions, 1975 flow [2024-05-12 10:47:19,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1975, PETRI_PLACES=180, PETRI_TRANSITIONS=193} [2024-05-12 10:47:19,870 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 127 predicate places. [2024-05-12 10:47:19,871 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 193 transitions, 1975 flow [2024-05-12 10:47:19,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:19,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:19,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:19,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 10:47:19,871 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:19,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:19,872 INFO L85 PathProgramCache]: Analyzing trace with hash 126479512, now seen corresponding path program 2 times [2024-05-12 10:47:19,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:19,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794321463] [2024-05-12 10:47:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:19,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:20,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:20,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794321463] [2024-05-12 10:47:20,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794321463] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:20,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:20,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:20,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108903586] [2024-05-12 10:47:20,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:20,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:20,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:20,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:20,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:20,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:20,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 193 transitions, 1975 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:20,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:20,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:20,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:20,986 INFO L124 PetriNetUnfolderBase]: 2693/4783 cut-off events. [2024-05-12 10:47:20,986 INFO L125 PetriNetUnfolderBase]: For 98107/98113 co-relation queries the response was YES. [2024-05-12 10:47:21,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25313 conditions, 4783 events. 2693/4783 cut-off events. For 98107/98113 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33255 event pairs, 985 based on Foata normal form. 1/4647 useless extension candidates. Maximal degree in co-relation 25236. Up to 4076 conditions per place. [2024-05-12 10:47:21,026 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 157 selfloop transitions, 45 changer transitions 0/218 dead transitions. [2024-05-12 10:47:21,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 218 transitions, 2554 flow [2024-05-12 10:47:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:47:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:47:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-05-12 10:47:21,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790816326530612 [2024-05-12 10:47:21,030 INFO L175 Difference]: Start difference. First operand has 180 places, 193 transitions, 1975 flow. Second operand 8 states and 227 transitions. [2024-05-12 10:47:21,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 218 transitions, 2554 flow [2024-05-12 10:47:21,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 218 transitions, 2481 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-05-12 10:47:21,202 INFO L231 Difference]: Finished difference. Result has 185 places, 196 transitions, 2047 flow [2024-05-12 10:47:21,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2047, PETRI_PLACES=185, PETRI_TRANSITIONS=196} [2024-05-12 10:47:21,202 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 132 predicate places. [2024-05-12 10:47:21,202 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 196 transitions, 2047 flow [2024-05-12 10:47:21,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:21,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:21,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:21,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 10:47:21,203 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:21,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:21,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1454878210, now seen corresponding path program 1 times [2024-05-12 10:47:21,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:21,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077812351] [2024-05-12 10:47:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:21,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:21,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077812351] [2024-05-12 10:47:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077812351] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:21,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:21,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:47:21,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093841542] [2024-05-12 10:47:21,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:21,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:47:21,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:21,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:47:21,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:47:21,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:21,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 196 transitions, 2047 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:21,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:21,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:21,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:22,200 INFO L124 PetriNetUnfolderBase]: 2714/4819 cut-off events. [2024-05-12 10:47:22,200 INFO L125 PetriNetUnfolderBase]: For 99193/99199 co-relation queries the response was YES. [2024-05-12 10:47:22,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25555 conditions, 4819 events. 2714/4819 cut-off events. For 99193/99199 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 33534 event pairs, 738 based on Foata normal form. 2/4686 useless extension candidates. Maximal degree in co-relation 25477. Up to 4065 conditions per place. [2024-05-12 10:47:22,378 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 185 selfloop transitions, 25 changer transitions 0/226 dead transitions. [2024-05-12 10:47:22,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 226 transitions, 2663 flow [2024-05-12 10:47:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-05-12 10:47:22,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-05-12 10:47:22,379 INFO L175 Difference]: Start difference. First operand has 185 places, 196 transitions, 2047 flow. Second operand 6 states and 181 transitions. [2024-05-12 10:47:22,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 226 transitions, 2663 flow [2024-05-12 10:47:22,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 226 transitions, 2557 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 10:47:22,590 INFO L231 Difference]: Finished difference. Result has 184 places, 200 transitions, 2050 flow [2024-05-12 10:47:22,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2050, PETRI_PLACES=184, PETRI_TRANSITIONS=200} [2024-05-12 10:47:22,590 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 131 predicate places. [2024-05-12 10:47:22,590 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 200 transitions, 2050 flow [2024-05-12 10:47:22,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:22,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:22,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:22,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 10:47:22,591 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:22,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:22,591 INFO L85 PathProgramCache]: Analyzing trace with hash 126476536, now seen corresponding path program 2 times [2024-05-12 10:47:22,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:22,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803863159] [2024-05-12 10:47:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:22,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:23,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:23,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803863159] [2024-05-12 10:47:23,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803863159] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:23,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:23,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:47:23,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996303898] [2024-05-12 10:47:23,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:23,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:47:23,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:23,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:47:23,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:47:23,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:23,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 200 transitions, 2050 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:23,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:23,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:23,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:23,609 INFO L124 PetriNetUnfolderBase]: 2735/4855 cut-off events. [2024-05-12 10:47:23,609 INFO L125 PetriNetUnfolderBase]: For 100299/100305 co-relation queries the response was YES. [2024-05-12 10:47:23,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25908 conditions, 4855 events. 2735/4855 cut-off events. For 100299/100305 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33799 event pairs, 987 based on Foata normal form. 2/4716 useless extension candidates. Maximal degree in co-relation 25830. Up to 4161 conditions per place. [2024-05-12 10:47:23,649 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 182 selfloop transitions, 23 changer transitions 0/221 dead transitions. [2024-05-12 10:47:23,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 221 transitions, 2538 flow [2024-05-12 10:47:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 10:47:23,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-05-12 10:47:23,651 INFO L175 Difference]: Start difference. First operand has 184 places, 200 transitions, 2050 flow. Second operand 6 states and 175 transitions. [2024-05-12 10:47:23,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 221 transitions, 2538 flow [2024-05-12 10:47:23,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 221 transitions, 2477 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-05-12 10:47:23,851 INFO L231 Difference]: Finished difference. Result has 188 places, 202 transitions, 2072 flow [2024-05-12 10:47:23,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2072, PETRI_PLACES=188, PETRI_TRANSITIONS=202} [2024-05-12 10:47:23,852 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 135 predicate places. [2024-05-12 10:47:23,852 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 202 transitions, 2072 flow [2024-05-12 10:47:23,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:23,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:23,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:23,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 10:47:23,853 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:23,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1359879796, now seen corresponding path program 3 times [2024-05-12 10:47:23,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:23,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129593487] [2024-05-12 10:47:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:23,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:24,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129593487] [2024-05-12 10:47:24,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129593487] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:24,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:24,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:24,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104618402] [2024-05-12 10:47:24,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:24,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:24,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:24,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:24,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:24,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 202 transitions, 2072 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:24,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:24,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:24,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:24,911 INFO L124 PetriNetUnfolderBase]: 2750/4879 cut-off events. [2024-05-12 10:47:24,911 INFO L125 PetriNetUnfolderBase]: For 103718/103724 co-relation queries the response was YES. [2024-05-12 10:47:24,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26098 conditions, 4879 events. 2750/4879 cut-off events. For 103718/103724 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33987 event pairs, 993 based on Foata normal form. 1/4734 useless extension candidates. Maximal degree in co-relation 26018. Up to 4086 conditions per place. [2024-05-12 10:47:24,955 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 157 selfloop transitions, 75 changer transitions 0/248 dead transitions. [2024-05-12 10:47:24,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 248 transitions, 2994 flow [2024-05-12 10:47:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:47:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:47:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2024-05-12 10:47:24,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009070294784581 [2024-05-12 10:47:24,956 INFO L175 Difference]: Start difference. First operand has 188 places, 202 transitions, 2072 flow. Second operand 9 states and 265 transitions. [2024-05-12 10:47:24,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 248 transitions, 2994 flow [2024-05-12 10:47:25,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 248 transitions, 2941 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:47:25,200 INFO L231 Difference]: Finished difference. Result has 193 places, 211 transitions, 2307 flow [2024-05-12 10:47:25,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2307, PETRI_PLACES=193, PETRI_TRANSITIONS=211} [2024-05-12 10:47:25,201 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 140 predicate places. [2024-05-12 10:47:25,201 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 211 transitions, 2307 flow [2024-05-12 10:47:25,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:25,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:25,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:25,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 10:47:25,201 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:25,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1466846750, now seen corresponding path program 4 times [2024-05-12 10:47:25,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:25,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159241177] [2024-05-12 10:47:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:25,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159241177] [2024-05-12 10:47:25,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159241177] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:25,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:25,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:47:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831575831] [2024-05-12 10:47:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:25,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:47:25,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:47:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:47:25,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:25,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 211 transitions, 2307 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:25,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:25,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:25,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:26,283 INFO L124 PetriNetUnfolderBase]: 2756/4889 cut-off events. [2024-05-12 10:47:26,283 INFO L125 PetriNetUnfolderBase]: For 109149/109155 co-relation queries the response was YES. [2024-05-12 10:47:26,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26624 conditions, 4889 events. 2756/4889 cut-off events. For 109149/109155 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34145 event pairs, 993 based on Foata normal form. 1/4743 useless extension candidates. Maximal degree in co-relation 26543. Up to 4093 conditions per place. [2024-05-12 10:47:26,326 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 152 selfloop transitions, 80 changer transitions 0/248 dead transitions. [2024-05-12 10:47:26,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 248 transitions, 3067 flow [2024-05-12 10:47:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:47:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:47:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 283 transitions. [2024-05-12 10:47:26,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775510204081633 [2024-05-12 10:47:26,348 INFO L175 Difference]: Start difference. First operand has 193 places, 211 transitions, 2307 flow. Second operand 10 states and 283 transitions. [2024-05-12 10:47:26,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 248 transitions, 3067 flow [2024-05-12 10:47:26,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 248 transitions, 2849 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-05-12 10:47:26,557 INFO L231 Difference]: Finished difference. Result has 198 places, 214 transitions, 2303 flow [2024-05-12 10:47:26,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2303, PETRI_PLACES=198, PETRI_TRANSITIONS=214} [2024-05-12 10:47:26,558 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 145 predicate places. [2024-05-12 10:47:26,558 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 214 transitions, 2303 flow [2024-05-12 10:47:26,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:26,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:26,558 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] [2024-05-12 10:47:26,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 10:47:26,559 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:26,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:26,559 INFO L85 PathProgramCache]: Analyzing trace with hash 951629214, now seen corresponding path program 5 times [2024-05-12 10:47:26,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:26,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409511273] [2024-05-12 10:47:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:26,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:26,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:26,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409511273] [2024-05-12 10:47:26,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409511273] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:26,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:26,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:26,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108680207] [2024-05-12 10:47:26,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:26,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:26,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:26,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:27,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:27,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 214 transitions, 2303 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:27,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:27,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:27,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:27,625 INFO L124 PetriNetUnfolderBase]: 2771/4913 cut-off events. [2024-05-12 10:47:27,625 INFO L125 PetriNetUnfolderBase]: For 111533/111539 co-relation queries the response was YES. [2024-05-12 10:47:27,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26447 conditions, 4913 events. 2771/4913 cut-off events. For 111533/111539 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34218 event pairs, 993 based on Foata normal form. 1/4765 useless extension candidates. Maximal degree in co-relation 26366. Up to 4110 conditions per place. [2024-05-12 10:47:27,671 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 146 selfloop transitions, 86 changer transitions 0/248 dead transitions. [2024-05-12 10:47:27,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 248 transitions, 3077 flow [2024-05-12 10:47:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:47:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:47:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-05-12 10:47:27,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653061224489796 [2024-05-12 10:47:27,673 INFO L175 Difference]: Start difference. First operand has 198 places, 214 transitions, 2303 flow. Second operand 10 states and 277 transitions. [2024-05-12 10:47:27,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 248 transitions, 3077 flow [2024-05-12 10:47:27,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 248 transitions, 2933 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 10:47:27,954 INFO L231 Difference]: Finished difference. Result has 202 places, 220 transitions, 2411 flow [2024-05-12 10:47:27,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2411, PETRI_PLACES=202, PETRI_TRANSITIONS=220} [2024-05-12 10:47:27,954 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 149 predicate places. [2024-05-12 10:47:27,955 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 220 transitions, 2411 flow [2024-05-12 10:47:27,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:27,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:27,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:27,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 10:47:27,955 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:27,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1159830816, now seen corresponding path program 1 times [2024-05-12 10:47:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:27,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12789887] [2024-05-12 10:47:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:27,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:28,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:28,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12789887] [2024-05-12 10:47:28,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12789887] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:28,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:28,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:28,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444283773] [2024-05-12 10:47:28,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:28,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:28,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:28,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:28,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:28,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 220 transitions, 2411 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:28,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:28,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:28,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:29,085 INFO L124 PetriNetUnfolderBase]: 2777/4920 cut-off events. [2024-05-12 10:47:29,086 INFO L125 PetriNetUnfolderBase]: For 115641/115658 co-relation queries the response was YES. [2024-05-12 10:47:29,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26610 conditions, 4920 events. 2777/4920 cut-off events. For 115641/115658 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34313 event pairs, 993 based on Foata normal form. 10/4783 useless extension candidates. Maximal degree in co-relation 26528. Up to 4197 conditions per place. [2024-05-12 10:47:29,133 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 202 selfloop transitions, 28 changer transitions 0/246 dead transitions. [2024-05-12 10:47:29,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 246 transitions, 2971 flow [2024-05-12 10:47:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:47:29,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889212827988338 [2024-05-12 10:47:29,134 INFO L175 Difference]: Start difference. First operand has 202 places, 220 transitions, 2411 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:47:29,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 246 transitions, 2971 flow [2024-05-12 10:47:29,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 246 transitions, 2838 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 10:47:29,412 INFO L231 Difference]: Finished difference. Result has 203 places, 223 transitions, 2388 flow [2024-05-12 10:47:29,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2388, PETRI_PLACES=203, PETRI_TRANSITIONS=223} [2024-05-12 10:47:29,413 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 150 predicate places. [2024-05-12 10:47:29,413 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 223 transitions, 2388 flow [2024-05-12 10:47:29,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:29,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:29,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:29,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 10:47:29,414 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:29,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:29,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1466853694, now seen corresponding path program 2 times [2024-05-12 10:47:29,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:29,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311199395] [2024-05-12 10:47:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:29,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:29,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:29,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311199395] [2024-05-12 10:47:29,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311199395] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:29,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:29,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:29,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277194905] [2024-05-12 10:47:29,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:29,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:29,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:29,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:29,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:29,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:29,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 223 transitions, 2388 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:29,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:29,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:29,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:30,504 INFO L124 PetriNetUnfolderBase]: 2792/4947 cut-off events. [2024-05-12 10:47:30,504 INFO L125 PetriNetUnfolderBase]: For 121024/121032 co-relation queries the response was YES. [2024-05-12 10:47:30,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27017 conditions, 4947 events. 2792/4947 cut-off events. For 121024/121032 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34556 event pairs, 999 based on Foata normal form. 3/4798 useless extension candidates. Maximal degree in co-relation 26934. Up to 4148 conditions per place. [2024-05-12 10:47:30,551 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 184 selfloop transitions, 61 changer transitions 0/261 dead transitions. [2024-05-12 10:47:30,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 261 transitions, 3306 flow [2024-05-12 10:47:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-05-12 10:47:30,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005830903790087 [2024-05-12 10:47:30,552 INFO L175 Difference]: Start difference. First operand has 203 places, 223 transitions, 2388 flow. Second operand 7 states and 206 transitions. [2024-05-12 10:47:30,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 261 transitions, 3306 flow [2024-05-12 10:47:30,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 261 transitions, 3222 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 10:47:30,781 INFO L231 Difference]: Finished difference. Result has 206 places, 239 transitions, 2666 flow [2024-05-12 10:47:30,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2304, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2666, PETRI_PLACES=206, PETRI_TRANSITIONS=239} [2024-05-12 10:47:30,781 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 153 predicate places. [2024-05-12 10:47:30,782 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 239 transitions, 2666 flow [2024-05-12 10:47:30,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:30,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:30,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:30,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 10:47:30,782 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:30,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:30,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1159646242, now seen corresponding path program 1 times [2024-05-12 10:47:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:30,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365543273] [2024-05-12 10:47:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:30,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:31,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:31,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365543273] [2024-05-12 10:47:31,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365543273] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:31,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:31,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:31,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822423214] [2024-05-12 10:47:31,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:31,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:31,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:31,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:31,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 239 transitions, 2666 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:31,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:31,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:31,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:31,777 INFO L124 PetriNetUnfolderBase]: 2807/4973 cut-off events. [2024-05-12 10:47:31,778 INFO L125 PetriNetUnfolderBase]: For 127712/127720 co-relation queries the response was YES. [2024-05-12 10:47:31,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27632 conditions, 4973 events. 2807/4973 cut-off events. For 127712/127720 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34713 event pairs, 994 based on Foata normal form. 3/4823 useless extension candidates. Maximal degree in co-relation 27547. Up to 4196 conditions per place. [2024-05-12 10:47:31,824 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 204 selfloop transitions, 56 changer transitions 0/276 dead transitions. [2024-05-12 10:47:31,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 276 transitions, 3600 flow [2024-05-12 10:47:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-05-12 10:47:31,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.597667638483965 [2024-05-12 10:47:31,825 INFO L175 Difference]: Start difference. First operand has 206 places, 239 transitions, 2666 flow. Second operand 7 states and 205 transitions. [2024-05-12 10:47:31,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 276 transitions, 3600 flow [2024-05-12 10:47:32,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 276 transitions, 3540 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-05-12 10:47:32,137 INFO L231 Difference]: Finished difference. Result has 213 places, 254 transitions, 2953 flow [2024-05-12 10:47:32,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2953, PETRI_PLACES=213, PETRI_TRANSITIONS=254} [2024-05-12 10:47:32,138 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 160 predicate places. [2024-05-12 10:47:32,138 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 254 transitions, 2953 flow [2024-05-12 10:47:32,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:32,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:32,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:32,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 10:47:32,139 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:32,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash 951636158, now seen corresponding path program 3 times [2024-05-12 10:47:32,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:32,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601003850] [2024-05-12 10:47:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:32,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:32,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:32,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601003850] [2024-05-12 10:47:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601003850] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:32,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:32,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:32,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863299815] [2024-05-12 10:47:32,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:32,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:32,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:32,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:32,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:32,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 254 transitions, 2953 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:32,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:32,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:32,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:33,141 INFO L124 PetriNetUnfolderBase]: 2822/4995 cut-off events. [2024-05-12 10:47:33,141 INFO L125 PetriNetUnfolderBase]: For 135249/135261 co-relation queries the response was YES. [2024-05-12 10:47:33,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28375 conditions, 4995 events. 2822/4995 cut-off events. For 135249/135261 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34854 event pairs, 998 based on Foata normal form. 7/4847 useless extension candidates. Maximal degree in co-relation 28286. Up to 4185 conditions per place. [2024-05-12 10:47:33,189 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 194 selfloop transitions, 69 changer transitions 0/279 dead transitions. [2024-05-12 10:47:33,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 279 transitions, 3805 flow [2024-05-12 10:47:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:47:33,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889212827988338 [2024-05-12 10:47:33,190 INFO L175 Difference]: Start difference. First operand has 213 places, 254 transitions, 2953 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:47:33,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 279 transitions, 3805 flow [2024-05-12 10:47:33,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 279 transitions, 3724 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-05-12 10:47:33,644 INFO L231 Difference]: Finished difference. Result has 218 places, 260 transitions, 3112 flow [2024-05-12 10:47:33,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3112, PETRI_PLACES=218, PETRI_TRANSITIONS=260} [2024-05-12 10:47:33,645 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 165 predicate places. [2024-05-12 10:47:33,645 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 260 transitions, 3112 flow [2024-05-12 10:47:33,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:33,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:33,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:33,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 10:47:33,645 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:33,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:33,646 INFO L85 PathProgramCache]: Analyzing trace with hash 951643102, now seen corresponding path program 2 times [2024-05-12 10:47:33,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:33,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497072943] [2024-05-12 10:47:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:33,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:34,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497072943] [2024-05-12 10:47:34,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497072943] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:34,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:34,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:34,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065668256] [2024-05-12 10:47:34,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:34,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:34,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:34,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:34,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:34,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 260 transitions, 3112 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:34,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:34,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:34,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:34,687 INFO L124 PetriNetUnfolderBase]: 2846/5035 cut-off events. [2024-05-12 10:47:34,687 INFO L125 PetriNetUnfolderBase]: For 142348/142358 co-relation queries the response was YES. [2024-05-12 10:47:34,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28920 conditions, 5035 events. 2846/5035 cut-off events. For 142348/142358 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 35135 event pairs, 994 based on Foata normal form. 5/4882 useless extension candidates. Maximal degree in co-relation 28829. Up to 4243 conditions per place. [2024-05-12 10:47:34,735 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 210 selfloop transitions, 63 changer transitions 0/289 dead transitions. [2024-05-12 10:47:34,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 289 transitions, 4109 flow [2024-05-12 10:47:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:47:34,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947521865889213 [2024-05-12 10:47:34,737 INFO L175 Difference]: Start difference. First operand has 218 places, 260 transitions, 3112 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:47:34,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 289 transitions, 4109 flow [2024-05-12 10:47:35,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 289 transitions, 3999 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 10:47:35,259 INFO L231 Difference]: Finished difference. Result has 222 places, 269 transitions, 3255 flow [2024-05-12 10:47:35,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3255, PETRI_PLACES=222, PETRI_TRANSITIONS=269} [2024-05-12 10:47:35,260 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 169 predicate places. [2024-05-12 10:47:35,260 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 269 transitions, 3255 flow [2024-05-12 10:47:35,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:35,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:35,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:35,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 10:47:35,261 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:35,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:35,262 INFO L85 PathProgramCache]: Analyzing trace with hash 960213982, now seen corresponding path program 3 times [2024-05-12 10:47:35,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:35,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037654037] [2024-05-12 10:47:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:35,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:35,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:35,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037654037] [2024-05-12 10:47:35,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037654037] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:35,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:35,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:35,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644318295] [2024-05-12 10:47:35,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:35,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:35,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:35,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:35,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 269 transitions, 3255 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:35,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:35,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:35,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:36,372 INFO L124 PetriNetUnfolderBase]: 2843/5031 cut-off events. [2024-05-12 10:47:36,372 INFO L125 PetriNetUnfolderBase]: For 145961/145971 co-relation queries the response was YES. [2024-05-12 10:47:36,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28922 conditions, 5031 events. 2843/5031 cut-off events. For 145961/145971 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 35146 event pairs, 994 based on Foata normal form. 5/4878 useless extension candidates. Maximal degree in co-relation 28830. Up to 4240 conditions per place. [2024-05-12 10:47:36,443 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 207 selfloop transitions, 65 changer transitions 0/288 dead transitions. [2024-05-12 10:47:36,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 288 transitions, 4037 flow [2024-05-12 10:47:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:47:36,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889212827988338 [2024-05-12 10:47:36,445 INFO L175 Difference]: Start difference. First operand has 222 places, 269 transitions, 3255 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:47:36,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 288 transitions, 4037 flow [2024-05-12 10:47:37,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 288 transitions, 3931 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-05-12 10:47:37,197 INFO L231 Difference]: Finished difference. Result has 227 places, 269 transitions, 3285 flow [2024-05-12 10:47:37,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3285, PETRI_PLACES=227, PETRI_TRANSITIONS=269} [2024-05-12 10:47:37,198 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 174 predicate places. [2024-05-12 10:47:37,198 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 269 transitions, 3285 flow [2024-05-12 10:47:37,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:37,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:37,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:37,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 10:47:37,199 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:37,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash 960224894, now seen corresponding path program 1 times [2024-05-12 10:47:37,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:37,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491215267] [2024-05-12 10:47:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:37,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:37,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:37,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491215267] [2024-05-12 10:47:37,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491215267] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:37,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:37,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:37,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501487602] [2024-05-12 10:47:37,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:37,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:37,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:37,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:37,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:37,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:47:37,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 269 transitions, 3285 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:37,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:37,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:47:37,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:38,415 INFO L124 PetriNetUnfolderBase]: 2780/5020 cut-off events. [2024-05-12 10:47:38,416 INFO L125 PetriNetUnfolderBase]: For 162167/162185 co-relation queries the response was YES. [2024-05-12 10:47:38,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28819 conditions, 5020 events. 2780/5020 cut-off events. For 162167/162185 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35724 event pairs, 962 based on Foata normal form. 22/4859 useless extension candidates. Maximal degree in co-relation 28726. Up to 4017 conditions per place. [2024-05-12 10:47:38,461 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 209 selfloop transitions, 37 changer transitions 0/293 dead transitions. [2024-05-12 10:47:38,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 293 transitions, 3877 flow [2024-05-12 10:47:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-05-12 10:47:38,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005830903790087 [2024-05-12 10:47:38,462 INFO L175 Difference]: Start difference. First operand has 227 places, 269 transitions, 3285 flow. Second operand 7 states and 206 transitions. [2024-05-12 10:47:38,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 293 transitions, 3877 flow [2024-05-12 10:47:38,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 293 transitions, 3742 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 10:47:38,847 INFO L231 Difference]: Finished difference. Result has 229 places, 270 transitions, 3250 flow [2024-05-12 10:47:38,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3250, PETRI_PLACES=229, PETRI_TRANSITIONS=270} [2024-05-12 10:47:38,847 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 176 predicate places. [2024-05-12 10:47:38,847 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 270 transitions, 3250 flow [2024-05-12 10:47:38,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:38,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:38,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:38,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 10:47:38,848 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:38,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1329552850, now seen corresponding path program 6 times [2024-05-12 10:47:38,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:38,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506580838] [2024-05-12 10:47:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:38,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:39,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:39,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506580838] [2024-05-12 10:47:39,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506580838] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:39,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:39,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:39,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350996508] [2024-05-12 10:47:39,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:39,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:39,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:39,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:39,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:39,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:39,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 270 transitions, 3250 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:39,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:39,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:39,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:39,997 INFO L124 PetriNetUnfolderBase]: 2944/5197 cut-off events. [2024-05-12 10:47:39,998 INFO L125 PetriNetUnfolderBase]: For 158475/158484 co-relation queries the response was YES. [2024-05-12 10:47:40,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30159 conditions, 5197 events. 2944/5197 cut-off events. For 158475/158484 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36468 event pairs, 1018 based on Foata normal form. 1/5029 useless extension candidates. Maximal degree in co-relation 30065. Up to 4358 conditions per place. [2024-05-12 10:47:40,056 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 203 selfloop transitions, 87 changer transitions 0/306 dead transitions. [2024-05-12 10:47:40,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 306 transitions, 4149 flow [2024-05-12 10:47:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:47:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:47:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-05-12 10:47:40,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5895691609977324 [2024-05-12 10:47:40,057 INFO L175 Difference]: Start difference. First operand has 229 places, 270 transitions, 3250 flow. Second operand 9 states and 260 transitions. [2024-05-12 10:47:40,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 306 transitions, 4149 flow [2024-05-12 10:47:40,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 306 transitions, 4071 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 10:47:40,369 INFO L231 Difference]: Finished difference. Result has 233 places, 273 transitions, 3389 flow [2024-05-12 10:47:40,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3172, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3389, PETRI_PLACES=233, PETRI_TRANSITIONS=273} [2024-05-12 10:47:40,370 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 180 predicate places. [2024-05-12 10:47:40,370 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 273 transitions, 3389 flow [2024-05-12 10:47:40,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:40,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:40,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:40,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 10:47:40,370 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:40,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:40,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1340980690, now seen corresponding path program 7 times [2024-05-12 10:47:40,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:40,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588068232] [2024-05-12 10:47:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:40,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:40,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:40,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588068232] [2024-05-12 10:47:40,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588068232] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:40,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:40,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:40,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693859268] [2024-05-12 10:47:40,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:40,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:40,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:40,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:40,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:40,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:40,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 273 transitions, 3389 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:40,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:40,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:40,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:41,557 INFO L124 PetriNetUnfolderBase]: 2941/5193 cut-off events. [2024-05-12 10:47:41,557 INFO L125 PetriNetUnfolderBase]: For 161189/161198 co-relation queries the response was YES. [2024-05-12 10:47:41,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30097 conditions, 5193 events. 2941/5193 cut-off events. For 161189/161198 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36462 event pairs, 1018 based on Foata normal form. 1/5025 useless extension candidates. Maximal degree in co-relation 30002. Up to 4355 conditions per place. [2024-05-12 10:47:41,609 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 204 selfloop transitions, 88 changer transitions 0/308 dead transitions. [2024-05-12 10:47:41,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 308 transitions, 4263 flow [2024-05-12 10:47:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:47:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:47:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 306 transitions. [2024-05-12 10:47:41,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677179962894249 [2024-05-12 10:47:41,611 INFO L175 Difference]: Start difference. First operand has 233 places, 273 transitions, 3389 flow. Second operand 11 states and 306 transitions. [2024-05-12 10:47:41,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 308 transitions, 4263 flow [2024-05-12 10:47:41,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 308 transitions, 4008 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-05-12 10:47:41,921 INFO L231 Difference]: Finished difference. Result has 237 places, 273 transitions, 3316 flow [2024-05-12 10:47:41,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3316, PETRI_PLACES=237, PETRI_TRANSITIONS=273} [2024-05-12 10:47:41,921 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 184 predicate places. [2024-05-12 10:47:41,921 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 273 transitions, 3316 flow [2024-05-12 10:47:41,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:41,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:41,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:41,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 10:47:41,922 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:41,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash 492447134, now seen corresponding path program 8 times [2024-05-12 10:47:41,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:41,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548338849] [2024-05-12 10:47:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:41,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:42,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:42,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548338849] [2024-05-12 10:47:42,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548338849] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:42,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:42,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:42,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277183239] [2024-05-12 10:47:42,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:42,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:42,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:42,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:42,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:42,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:42,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 273 transitions, 3316 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:42,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:42,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:42,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:43,090 INFO L124 PetriNetUnfolderBase]: 2947/5203 cut-off events. [2024-05-12 10:47:43,091 INFO L125 PetriNetUnfolderBase]: For 165654/165663 co-relation queries the response was YES. [2024-05-12 10:47:43,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30085 conditions, 5203 events. 2947/5203 cut-off events. For 165654/165663 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36528 event pairs, 1018 based on Foata normal form. 1/5034 useless extension candidates. Maximal degree in co-relation 29990. Up to 4362 conditions per place. [2024-05-12 10:47:43,145 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 194 selfloop transitions, 93 changer transitions 0/303 dead transitions. [2024-05-12 10:47:43,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 303 transitions, 4093 flow [2024-05-12 10:47:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:47:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:47:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 275 transitions. [2024-05-12 10:47:43,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-05-12 10:47:43,147 INFO L175 Difference]: Start difference. First operand has 237 places, 273 transitions, 3316 flow. Second operand 10 states and 275 transitions. [2024-05-12 10:47:43,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 303 transitions, 4093 flow [2024-05-12 10:47:43,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 303 transitions, 3915 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:47:43,517 INFO L231 Difference]: Finished difference. Result has 239 places, 276 transitions, 3363 flow [2024-05-12 10:47:43,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3363, PETRI_PLACES=239, PETRI_TRANSITIONS=276} [2024-05-12 10:47:43,518 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 186 predicate places. [2024-05-12 10:47:43,518 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 276 transitions, 3363 flow [2024-05-12 10:47:43,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:43,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:43,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:43,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 10:47:43,519 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:43,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1145407744, now seen corresponding path program 9 times [2024-05-12 10:47:43,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:43,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640353476] [2024-05-12 10:47:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:43,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:43,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:43,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640353476] [2024-05-12 10:47:43,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640353476] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:43,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:43,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:43,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236961949] [2024-05-12 10:47:43,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:43,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:43,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:43,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:43,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:43,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:43,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 276 transitions, 3363 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:43,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:43,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:43,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:44,660 INFO L124 PetriNetUnfolderBase]: 2944/5196 cut-off events. [2024-05-12 10:47:44,660 INFO L125 PetriNetUnfolderBase]: For 169412/169421 co-relation queries the response was YES. [2024-05-12 10:47:44,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30114 conditions, 5196 events. 2944/5196 cut-off events. For 169412/169421 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36531 event pairs, 1027 based on Foata normal form. 1/5025 useless extension candidates. Maximal degree in co-relation 30018. Up to 4359 conditions per place. [2024-05-12 10:47:44,710 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 191 selfloop transitions, 92 changer transitions 0/299 dead transitions. [2024-05-12 10:47:44,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 299 transitions, 4195 flow [2024-05-12 10:47:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:47:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:47:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2024-05-12 10:47:44,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-05-12 10:47:44,712 INFO L175 Difference]: Start difference. First operand has 239 places, 276 transitions, 3363 flow. Second operand 11 states and 294 transitions. [2024-05-12 10:47:44,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 299 transitions, 4195 flow [2024-05-12 10:47:45,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 299 transitions, 4033 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 10:47:45,138 INFO L231 Difference]: Finished difference. Result has 243 places, 276 transitions, 3391 flow [2024-05-12 10:47:45,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3201, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3391, PETRI_PLACES=243, PETRI_TRANSITIONS=276} [2024-05-12 10:47:45,139 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 190 predicate places. [2024-05-12 10:47:45,139 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 276 transitions, 3391 flow [2024-05-12 10:47:45,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:45,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:45,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:45,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 10:47:45,140 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:45,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash 100892062, now seen corresponding path program 10 times [2024-05-12 10:47:45,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:45,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013115001] [2024-05-12 10:47:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:45,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:45,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:45,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013115001] [2024-05-12 10:47:45,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013115001] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:45,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:45,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:45,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980304217] [2024-05-12 10:47:45,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:45,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:45,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:45,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:45,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:45,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:45,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 276 transitions, 3391 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:45,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:45,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:45,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:46,356 INFO L124 PetriNetUnfolderBase]: 2941/5190 cut-off events. [2024-05-12 10:47:46,356 INFO L125 PetriNetUnfolderBase]: For 172740/172755 co-relation queries the response was YES. [2024-05-12 10:47:46,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30135 conditions, 5190 events. 2941/5190 cut-off events. For 172740/172755 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36520 event pairs, 1022 based on Foata normal form. 7/5029 useless extension candidates. Maximal degree in co-relation 30038. Up to 4462 conditions per place. [2024-05-12 10:47:46,400 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 243 selfloop transitions, 27 changer transitions 0/286 dead transitions. [2024-05-12 10:47:46,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 286 transitions, 3955 flow [2024-05-12 10:47:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-05-12 10:47:46,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-05-12 10:47:46,401 INFO L175 Difference]: Start difference. First operand has 243 places, 276 transitions, 3391 flow. Second operand 6 states and 169 transitions. [2024-05-12 10:47:46,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 286 transitions, 3955 flow [2024-05-12 10:47:46,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 286 transitions, 3711 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-05-12 10:47:46,804 INFO L231 Difference]: Finished difference. Result has 239 places, 276 transitions, 3211 flow [2024-05-12 10:47:46,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3211, PETRI_PLACES=239, PETRI_TRANSITIONS=276} [2024-05-12 10:47:46,805 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 186 predicate places. [2024-05-12 10:47:46,805 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 276 transitions, 3211 flow [2024-05-12 10:47:46,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:46,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:46,805 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] [2024-05-12 10:47:46,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 10:47:46,806 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:46,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:46,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2078024290, now seen corresponding path program 11 times [2024-05-12 10:47:46,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:46,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026376002] [2024-05-12 10:47:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:46,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:47,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:47,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026376002] [2024-05-12 10:47:47,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026376002] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:47,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:47,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:47,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144797703] [2024-05-12 10:47:47,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:47,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:47,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:47,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:47,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 276 transitions, 3211 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:47,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:47,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:47,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:47,993 INFO L124 PetriNetUnfolderBase]: 2938/5188 cut-off events. [2024-05-12 10:47:47,993 INFO L125 PetriNetUnfolderBase]: For 175053/175062 co-relation queries the response was YES. [2024-05-12 10:47:48,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29914 conditions, 5188 events. 2938/5188 cut-off events. For 175053/175062 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36454 event pairs, 1027 based on Foata normal form. 1/5017 useless extension candidates. Maximal degree in co-relation 29817. Up to 4353 conditions per place. [2024-05-12 10:47:48,044 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 187 selfloop transitions, 93 changer transitions 0/296 dead transitions. [2024-05-12 10:47:48,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 296 transitions, 3819 flow [2024-05-12 10:47:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:47:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:47:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-05-12 10:47:48,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5469387755102041 [2024-05-12 10:47:48,045 INFO L175 Difference]: Start difference. First operand has 239 places, 276 transitions, 3211 flow. Second operand 10 states and 268 transitions. [2024-05-12 10:47:48,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 296 transitions, 3819 flow [2024-05-12 10:47:48,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 296 transitions, 3755 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 10:47:48,602 INFO L231 Difference]: Finished difference. Result has 243 places, 276 transitions, 3339 flow [2024-05-12 10:47:48,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3339, PETRI_PLACES=243, PETRI_TRANSITIONS=276} [2024-05-12 10:47:48,604 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 190 predicate places. [2024-05-12 10:47:48,604 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 276 transitions, 3339 flow [2024-05-12 10:47:48,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:48,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:48,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:48,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 10:47:48,605 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:48,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:48,605 INFO L85 PathProgramCache]: Analyzing trace with hash -418586060, now seen corresponding path program 3 times [2024-05-12 10:47:48,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:48,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256776114] [2024-05-12 10:47:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:48,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:49,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:49,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256776114] [2024-05-12 10:47:49,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256776114] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:49,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:49,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:49,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990897943] [2024-05-12 10:47:49,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:49,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:49,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:49,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:49,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:49,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:49,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 276 transitions, 3339 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:49,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:49,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:49,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:49,881 INFO L124 PetriNetUnfolderBase]: 2933/5179 cut-off events. [2024-05-12 10:47:49,881 INFO L125 PetriNetUnfolderBase]: For 173995/174010 co-relation queries the response was YES. [2024-05-12 10:47:49,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29938 conditions, 5179 events. 2933/5179 cut-off events. For 173995/174010 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36384 event pairs, 1021 based on Foata normal form. 8/5019 useless extension candidates. Maximal degree in co-relation 29841. Up to 4443 conditions per place. [2024-05-12 10:47:49,931 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 250 selfloop transitions, 23 changer transitions 0/289 dead transitions. [2024-05-12 10:47:49,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 289 transitions, 3919 flow [2024-05-12 10:47:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 10:47:49,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-05-12 10:47:49,932 INFO L175 Difference]: Start difference. First operand has 243 places, 276 transitions, 3339 flow. Second operand 6 states and 170 transitions. [2024-05-12 10:47:49,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 289 transitions, 3919 flow [2024-05-12 10:47:50,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 289 transitions, 3730 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-05-12 10:47:50,379 INFO L231 Difference]: Finished difference. Result has 241 places, 276 transitions, 3201 flow [2024-05-12 10:47:50,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3201, PETRI_PLACES=241, PETRI_TRANSITIONS=276} [2024-05-12 10:47:50,380 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 188 predicate places. [2024-05-12 10:47:50,380 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 276 transitions, 3201 flow [2024-05-12 10:47:50,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:50,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:50,381 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] [2024-05-12 10:47:50,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 10:47:50,381 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:50,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:50,381 INFO L85 PathProgramCache]: Analyzing trace with hash 64179778, now seen corresponding path program 4 times [2024-05-12 10:47:50,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:50,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868238469] [2024-05-12 10:47:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:50,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:50,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:50,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868238469] [2024-05-12 10:47:50,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868238469] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:50,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:50,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:50,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971918085] [2024-05-12 10:47:50,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:50,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:50,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:50,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:50,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 276 transitions, 3201 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:50,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:50,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:50,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:51,477 INFO L124 PetriNetUnfolderBase]: 2939/5192 cut-off events. [2024-05-12 10:47:51,477 INFO L125 PetriNetUnfolderBase]: For 176565/176574 co-relation queries the response was YES. [2024-05-12 10:47:51,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29899 conditions, 5192 events. 2939/5192 cut-off events. For 176565/176574 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36502 event pairs, 1014 based on Foata normal form. 1/5024 useless extension candidates. Maximal degree in co-relation 29801. Up to 4431 conditions per place. [2024-05-12 10:47:51,528 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 255 selfloop transitions, 28 changer transitions 0/299 dead transitions. [2024-05-12 10:47:51,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 299 transitions, 3864 flow [2024-05-12 10:47:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:47:51,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801749271137027 [2024-05-12 10:47:51,529 INFO L175 Difference]: Start difference. First operand has 241 places, 276 transitions, 3201 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:47:51,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 299 transitions, 3864 flow [2024-05-12 10:47:52,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 299 transitions, 3806 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 10:47:52,072 INFO L231 Difference]: Finished difference. Result has 243 places, 279 transitions, 3258 flow [2024-05-12 10:47:52,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3143, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3258, PETRI_PLACES=243, PETRI_TRANSITIONS=279} [2024-05-12 10:47:52,072 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 190 predicate places. [2024-05-12 10:47:52,073 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 279 transitions, 3258 flow [2024-05-12 10:47:52,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:52,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:52,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:52,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 10:47:52,073 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:52,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:52,074 INFO L85 PathProgramCache]: Analyzing trace with hash 564842686, now seen corresponding path program 5 times [2024-05-12 10:47:52,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:52,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038812646] [2024-05-12 10:47:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038812646] [2024-05-12 10:47:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038812646] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:52,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:52,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:52,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839816779] [2024-05-12 10:47:52,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:52,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:52,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:52,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:52,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:52,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:52,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 279 transitions, 3258 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:52,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:52,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:52,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:53,233 INFO L124 PetriNetUnfolderBase]: 2945/5204 cut-off events. [2024-05-12 10:47:53,233 INFO L125 PetriNetUnfolderBase]: For 181947/181956 co-relation queries the response was YES. [2024-05-12 10:47:53,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30066 conditions, 5204 events. 2945/5204 cut-off events. For 181947/181956 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36572 event pairs, 1017 based on Foata normal form. 1/5033 useless extension candidates. Maximal degree in co-relation 29967. Up to 4365 conditions per place. [2024-05-12 10:47:53,289 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 212 selfloop transitions, 74 changer transitions 0/302 dead transitions. [2024-05-12 10:47:53,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 302 transitions, 4273 flow [2024-05-12 10:47:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:47:53,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-05-12 10:47:53,291 INFO L175 Difference]: Start difference. First operand has 243 places, 279 transitions, 3258 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:47:53,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 302 transitions, 4273 flow [2024-05-12 10:47:53,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 302 transitions, 4193 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 10:47:53,767 INFO L231 Difference]: Finished difference. Result has 245 places, 282 transitions, 3385 flow [2024-05-12 10:47:53,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3385, PETRI_PLACES=245, PETRI_TRANSITIONS=282} [2024-05-12 10:47:53,768 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 192 predicate places. [2024-05-12 10:47:53,768 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 282 transitions, 3385 flow [2024-05-12 10:47:53,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:53,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:53,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:53,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 10:47:53,769 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:53,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash 789769696, now seen corresponding path program 6 times [2024-05-12 10:47:53,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:53,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501967484] [2024-05-12 10:47:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:53,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:54,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:54,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501967484] [2024-05-12 10:47:54,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501967484] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:54,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:54,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:54,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398820642] [2024-05-12 10:47:54,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:54,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:54,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:54,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:54,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:54,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 282 transitions, 3385 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:54,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:54,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:54,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:54,939 INFO L124 PetriNetUnfolderBase]: 2951/5212 cut-off events. [2024-05-12 10:47:54,939 INFO L125 PetriNetUnfolderBase]: For 187627/187636 co-relation queries the response was YES. [2024-05-12 10:47:54,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30318 conditions, 5212 events. 2951/5212 cut-off events. For 187627/187636 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36650 event pairs, 1014 based on Foata normal form. 1/5042 useless extension candidates. Maximal degree in co-relation 30218. Up to 4434 conditions per place. [2024-05-12 10:47:54,998 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 252 selfloop transitions, 41 changer transitions 0/309 dead transitions. [2024-05-12 10:47:54,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 309 transitions, 4217 flow [2024-05-12 10:47:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:47:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:47:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-05-12 10:47:55,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-05-12 10:47:55,000 INFO L175 Difference]: Start difference. First operand has 245 places, 282 transitions, 3385 flow. Second operand 9 states and 246 transitions. [2024-05-12 10:47:55,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 309 transitions, 4217 flow [2024-05-12 10:47:55,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 309 transitions, 4000 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-05-12 10:47:55,585 INFO L231 Difference]: Finished difference. Result has 252 places, 286 transitions, 3354 flow [2024-05-12 10:47:55,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3183, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3354, PETRI_PLACES=252, PETRI_TRANSITIONS=286} [2024-05-12 10:47:55,586 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 199 predicate places. [2024-05-12 10:47:55,586 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 286 transitions, 3354 flow [2024-05-12 10:47:55,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:55,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:55,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:55,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 10:47:55,586 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:55,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash 220094654, now seen corresponding path program 7 times [2024-05-12 10:47:55,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:55,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253805324] [2024-05-12 10:47:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:55,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:55,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:55,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253805324] [2024-05-12 10:47:55,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253805324] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:55,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:55,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:55,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271627549] [2024-05-12 10:47:55,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:55,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:55,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:55,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:55,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:56,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:56,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 286 transitions, 3354 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:56,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:56,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:56,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:56,695 INFO L124 PetriNetUnfolderBase]: 2948/5208 cut-off events. [2024-05-12 10:47:56,696 INFO L125 PetriNetUnfolderBase]: For 190259/190268 co-relation queries the response was YES. [2024-05-12 10:47:56,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30198 conditions, 5208 events. 2948/5208 cut-off events. For 190259/190268 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36626 event pairs, 1014 based on Foata normal form. 1/5038 useless extension candidates. Maximal degree in co-relation 30095. Up to 4431 conditions per place. [2024-05-12 10:47:56,750 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 247 selfloop transitions, 40 changer transitions 0/303 dead transitions. [2024-05-12 10:47:56,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 303 transitions, 3970 flow [2024-05-12 10:47:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:47:56,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 10:47:56,751 INFO L175 Difference]: Start difference. First operand has 252 places, 286 transitions, 3354 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:47:56,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 303 transitions, 3970 flow [2024-05-12 10:47:57,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 303 transitions, 3850 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-05-12 10:47:57,256 INFO L231 Difference]: Finished difference. Result has 253 places, 286 transitions, 3320 flow [2024-05-12 10:47:57,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3320, PETRI_PLACES=253, PETRI_TRANSITIONS=286} [2024-05-12 10:47:57,257 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 200 predicate places. [2024-05-12 10:47:57,257 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 286 transitions, 3320 flow [2024-05-12 10:47:57,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:57,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:57,257 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] [2024-05-12 10:47:57,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 10:47:57,257 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:57,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:57,258 INFO L85 PathProgramCache]: Analyzing trace with hash 492454078, now seen corresponding path program 8 times [2024-05-12 10:47:57,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:57,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528756938] [2024-05-12 10:47:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:57,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:57,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:57,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528756938] [2024-05-12 10:47:57,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528756938] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:57,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:57,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564477748] [2024-05-12 10:47:57,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:57,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:57,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:57,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:57,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:57,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 286 transitions, 3320 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:57,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:57,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:57,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:58,346 INFO L124 PetriNetUnfolderBase]: 2963/5234 cut-off events. [2024-05-12 10:47:58,346 INFO L125 PetriNetUnfolderBase]: For 197696/197705 co-relation queries the response was YES. [2024-05-12 10:47:58,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30482 conditions, 5234 events. 2963/5234 cut-off events. For 197696/197705 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36805 event pairs, 1017 based on Foata normal form. 1/5060 useless extension candidates. Maximal degree in co-relation 30378. Up to 4386 conditions per place. [2024-05-12 10:47:58,396 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 208 selfloop transitions, 85 changer transitions 0/309 dead transitions. [2024-05-12 10:47:58,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 309 transitions, 4306 flow [2024-05-12 10:47:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:47:58,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801749271137027 [2024-05-12 10:47:58,397 INFO L175 Difference]: Start difference. First operand has 253 places, 286 transitions, 3320 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:47:58,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 309 transitions, 4306 flow [2024-05-12 10:47:58,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 309 transitions, 4222 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 10:47:58,920 INFO L231 Difference]: Finished difference. Result has 253 places, 293 transitions, 3534 flow [2024-05-12 10:47:58,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3534, PETRI_PLACES=253, PETRI_TRANSITIONS=293} [2024-05-12 10:47:58,921 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 200 predicate places. [2024-05-12 10:47:58,921 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 293 transitions, 3534 flow [2024-05-12 10:47:58,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:58,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:58,921 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] [2024-05-12 10:47:58,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 10:47:58,922 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:58,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:58,922 INFO L85 PathProgramCache]: Analyzing trace with hash 501024958, now seen corresponding path program 9 times [2024-05-12 10:47:58,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:58,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109088814] [2024-05-12 10:47:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:58,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:59,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:59,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109088814] [2024-05-12 10:47:59,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109088814] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:59,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:59,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:47:59,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705731042] [2024-05-12 10:47:59,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:59,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:47:59,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:59,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:47:59,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:47:59,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:47:59,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 293 transitions, 3534 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:59,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:59,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:47:59,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:00,104 INFO L124 PetriNetUnfolderBase]: 2960/5230 cut-off events. [2024-05-12 10:48:00,104 INFO L125 PetriNetUnfolderBase]: For 201638/201647 co-relation queries the response was YES. [2024-05-12 10:48:00,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30580 conditions, 5230 events. 2960/5230 cut-off events. For 201638/201647 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36782 event pairs, 1017 based on Foata normal form. 1/5056 useless extension candidates. Maximal degree in co-relation 30475. Up to 4383 conditions per place. [2024-05-12 10:48:00,165 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 206 selfloop transitions, 86 changer transitions 0/308 dead transitions. [2024-05-12 10:48:00,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 308 transitions, 4276 flow [2024-05-12 10:48:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-05-12 10:48:00,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577259475218659 [2024-05-12 10:48:00,166 INFO L175 Difference]: Start difference. First operand has 253 places, 293 transitions, 3534 flow. Second operand 7 states and 198 transitions. [2024-05-12 10:48:00,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 308 transitions, 4276 flow [2024-05-12 10:48:00,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 308 transitions, 4127 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-05-12 10:48:00,799 INFO L231 Difference]: Finished difference. Result has 258 places, 293 transitions, 3563 flow [2024-05-12 10:48:00,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3563, PETRI_PLACES=258, PETRI_TRANSITIONS=293} [2024-05-12 10:48:00,800 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 205 predicate places. [2024-05-12 10:48:00,800 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 293 transitions, 3563 flow [2024-05-12 10:48:00,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:00,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:00,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:00,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 10:48:00,801 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:00,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash 564849630, now seen corresponding path program 4 times [2024-05-12 10:48:00,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:00,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681134793] [2024-05-12 10:48:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:00,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:01,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:01,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681134793] [2024-05-12 10:48:01,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681134793] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:01,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:01,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:01,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776271463] [2024-05-12 10:48:01,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:01,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:01,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:01,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:01,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 293 transitions, 3563 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:01,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:01,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:01,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:01,922 INFO L124 PetriNetUnfolderBase]: 2957/5228 cut-off events. [2024-05-12 10:48:01,922 INFO L125 PetriNetUnfolderBase]: For 205511/205530 co-relation queries the response was YES. [2024-05-12 10:48:01,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30549 conditions, 5228 events. 2957/5228 cut-off events. For 205511/205530 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36810 event pairs, 1021 based on Foata normal form. 8/5063 useless extension candidates. Maximal degree in co-relation 30443. Up to 4411 conditions per place. [2024-05-12 10:48:01,976 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 231 selfloop transitions, 67 changer transitions 0/314 dead transitions. [2024-05-12 10:48:01,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 314 transitions, 4488 flow [2024-05-12 10:48:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:48:01,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889212827988338 [2024-05-12 10:48:01,977 INFO L175 Difference]: Start difference. First operand has 258 places, 293 transitions, 3563 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:48:01,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 314 transitions, 4488 flow [2024-05-12 10:48:02,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 314 transitions, 4270 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-05-12 10:48:02,419 INFO L231 Difference]: Finished difference. Result has 258 places, 295 transitions, 3520 flow [2024-05-12 10:48:02,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3353, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3520, PETRI_PLACES=258, PETRI_TRANSITIONS=295} [2024-05-12 10:48:02,420 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 205 predicate places. [2024-05-12 10:48:02,420 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 295 transitions, 3520 flow [2024-05-12 10:48:02,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:02,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:02,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:02,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 10:48:02,421 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:02,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:02,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1268605970, now seen corresponding path program 5 times [2024-05-12 10:48:02,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:02,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467663402] [2024-05-12 10:48:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:02,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:02,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:02,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467663402] [2024-05-12 10:48:02,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467663402] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:02,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:02,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:02,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690819205] [2024-05-12 10:48:02,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:02,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:02,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:02,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:02,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:02,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:02,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 295 transitions, 3520 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:02,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:02,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:02,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:03,483 INFO L124 PetriNetUnfolderBase]: 2972/5252 cut-off events. [2024-05-12 10:48:03,483 INFO L125 PetriNetUnfolderBase]: For 212770/212787 co-relation queries the response was YES. [2024-05-12 10:48:03,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30768 conditions, 5252 events. 2972/5252 cut-off events. For 212770/212787 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37033 event pairs, 1021 based on Foata normal form. 6/5083 useless extension candidates. Maximal degree in co-relation 30663. Up to 4428 conditions per place. [2024-05-12 10:48:03,632 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 229 selfloop transitions, 72 changer transitions 0/317 dead transitions. [2024-05-12 10:48:03,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 317 transitions, 4520 flow [2024-05-12 10:48:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:48:03,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5830903790087464 [2024-05-12 10:48:03,633 INFO L175 Difference]: Start difference. First operand has 258 places, 295 transitions, 3520 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:48:03,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 317 transitions, 4520 flow [2024-05-12 10:48:04,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 317 transitions, 4402 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 10:48:04,139 INFO L231 Difference]: Finished difference. Result has 262 places, 301 transitions, 3660 flow [2024-05-12 10:48:04,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3660, PETRI_PLACES=262, PETRI_TRANSITIONS=301} [2024-05-12 10:48:04,139 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 209 predicate places. [2024-05-12 10:48:04,139 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 301 transitions, 3660 flow [2024-05-12 10:48:04,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:04,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:04,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:04,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 10:48:04,140 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:04,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:04,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1639622354, now seen corresponding path program 6 times [2024-05-12 10:48:04,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:04,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297093731] [2024-05-12 10:48:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:04,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:04,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:04,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297093731] [2024-05-12 10:48:04,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297093731] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:04,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:04,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:04,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378824003] [2024-05-12 10:48:04,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:04,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:04,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:04,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:04,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:04,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:04,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 301 transitions, 3660 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:04,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:04,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:04,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:05,247 INFO L124 PetriNetUnfolderBase]: 2969/5249 cut-off events. [2024-05-12 10:48:05,248 INFO L125 PetriNetUnfolderBase]: For 216391/216404 co-relation queries the response was YES. [2024-05-12 10:48:05,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30747 conditions, 5249 events. 2969/5249 cut-off events. For 216391/216404 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36907 event pairs, 1009 based on Foata normal form. 5/5082 useless extension candidates. Maximal degree in co-relation 30640. Up to 4520 conditions per place. [2024-05-12 10:48:05,304 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 274 selfloop transitions, 25 changer transitions 0/315 dead transitions. [2024-05-12 10:48:05,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 315 transitions, 4292 flow [2024-05-12 10:48:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 10:48:05,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626822157434402 [2024-05-12 10:48:05,305 INFO L175 Difference]: Start difference. First operand has 262 places, 301 transitions, 3660 flow. Second operand 7 states and 193 transitions. [2024-05-12 10:48:05,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 315 transitions, 4292 flow [2024-05-12 10:48:05,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 315 transitions, 4158 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 10:48:05,841 INFO L231 Difference]: Finished difference. Result has 266 places, 301 transitions, 3582 flow [2024-05-12 10:48:05,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3582, PETRI_PLACES=266, PETRI_TRANSITIONS=301} [2024-05-12 10:48:05,842 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 213 predicate places. [2024-05-12 10:48:05,842 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 301 transitions, 3582 flow [2024-05-12 10:48:05,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:05,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:05,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:05,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 10:48:05,843 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:05,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:05,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1038263264, now seen corresponding path program 10 times [2024-05-12 10:48:05,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:05,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17873518] [2024-05-12 10:48:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:05,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17873518] [2024-05-12 10:48:06,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17873518] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:06,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17509906] [2024-05-12 10:48:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:06,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:06,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:06,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 301 transitions, 3582 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:06,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:06,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:06,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:07,543 INFO L124 PetriNetUnfolderBase]: 2975/5251 cut-off events. [2024-05-12 10:48:07,543 INFO L125 PetriNetUnfolderBase]: For 222624/222650 co-relation queries the response was YES. [2024-05-12 10:48:07,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30766 conditions, 5251 events. 2975/5251 cut-off events. For 222624/222650 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36984 event pairs, 1042 based on Foata normal form. 12/5084 useless extension candidates. Maximal degree in co-relation 30658. Up to 4402 conditions per place. [2024-05-12 10:48:07,616 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 214 selfloop transitions, 87 changer transitions 0/317 dead transitions. [2024-05-12 10:48:07,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 317 transitions, 4526 flow [2024-05-12 10:48:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:48:07,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5743440233236151 [2024-05-12 10:48:07,618 INFO L175 Difference]: Start difference. First operand has 266 places, 301 transitions, 3582 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:48:07,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 317 transitions, 4526 flow [2024-05-12 10:48:08,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 317 transitions, 4426 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 10:48:08,325 INFO L231 Difference]: Finished difference. Result has 266 places, 304 transitions, 3714 flow [2024-05-12 10:48:08,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3714, PETRI_PLACES=266, PETRI_TRANSITIONS=304} [2024-05-12 10:48:08,327 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 213 predicate places. [2024-05-12 10:48:08,327 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 304 transitions, 3714 flow [2024-05-12 10:48:08,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:08,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:08,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:08,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 10:48:08,328 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:08,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1476387326, now seen corresponding path program 11 times [2024-05-12 10:48:08,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:08,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850794140] [2024-05-12 10:48:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:08,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:08,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:08,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850794140] [2024-05-12 10:48:08,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850794140] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:08,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:08,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:08,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022589774] [2024-05-12 10:48:08,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:08,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:08,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:08,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:08,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 304 transitions, 3714 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:08,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:08,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:08,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:09,443 INFO L124 PetriNetUnfolderBase]: 2972/5247 cut-off events. [2024-05-12 10:48:09,444 INFO L125 PetriNetUnfolderBase]: For 226565/226585 co-relation queries the response was YES. [2024-05-12 10:48:09,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30892 conditions, 5247 events. 2972/5247 cut-off events. For 226565/226585 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37000 event pairs, 1042 based on Foata normal form. 8/5076 useless extension candidates. Maximal degree in co-relation 30783. Up to 4399 conditions per place. [2024-05-12 10:48:09,496 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 211 selfloop transitions, 89 changer transitions 0/316 dead transitions. [2024-05-12 10:48:09,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 316 transitions, 4474 flow [2024-05-12 10:48:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:48:09,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685131195335277 [2024-05-12 10:48:09,498 INFO L175 Difference]: Start difference. First operand has 266 places, 304 transitions, 3714 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:48:09,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 316 transitions, 4474 flow [2024-05-12 10:48:10,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 316 transitions, 4194 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:10,084 INFO L231 Difference]: Finished difference. Result has 268 places, 304 transitions, 3618 flow [2024-05-12 10:48:10,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3434, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3618, PETRI_PLACES=268, PETRI_TRANSITIONS=304} [2024-05-12 10:48:10,084 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 215 predicate places. [2024-05-12 10:48:10,084 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 304 transitions, 3618 flow [2024-05-12 10:48:10,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:10,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:10,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:10,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 10:48:10,085 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:10,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1239915296, now seen corresponding path program 12 times [2024-05-12 10:48:10,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:10,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966650383] [2024-05-12 10:48:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:10,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:10,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:10,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966650383] [2024-05-12 10:48:10,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966650383] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:10,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:10,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:10,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527515282] [2024-05-12 10:48:10,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:10,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:10,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:10,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:10,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:10,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 304 transitions, 3618 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:10,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:10,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:10,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:11,255 INFO L124 PetriNetUnfolderBase]: 2969/5243 cut-off events. [2024-05-12 10:48:11,255 INFO L125 PetriNetUnfolderBase]: For 228474/228494 co-relation queries the response was YES. [2024-05-12 10:48:11,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30793 conditions, 5243 events. 2969/5243 cut-off events. For 228474/228494 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37019 event pairs, 1042 based on Foata normal form. 8/5072 useless extension candidates. Maximal degree in co-relation 30683. Up to 4396 conditions per place. [2024-05-12 10:48:11,317 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 210 selfloop transitions, 89 changer transitions 0/315 dead transitions. [2024-05-12 10:48:11,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 315 transitions, 4242 flow [2024-05-12 10:48:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 10:48:11,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565597667638484 [2024-05-12 10:48:11,319 INFO L175 Difference]: Start difference. First operand has 268 places, 304 transitions, 3618 flow. Second operand 7 states and 194 transitions. [2024-05-12 10:48:11,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 315 transitions, 4242 flow [2024-05-12 10:48:11,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 315 transitions, 4026 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 10:48:11,930 INFO L231 Difference]: Finished difference. Result has 269 places, 304 transitions, 3586 flow [2024-05-12 10:48:11,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3586, PETRI_PLACES=269, PETRI_TRANSITIONS=304} [2024-05-12 10:48:11,930 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 216 predicate places. [2024-05-12 10:48:11,931 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 304 transitions, 3586 flow [2024-05-12 10:48:11,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:11,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:11,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:11,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 10:48:11,931 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:11,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:11,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2062773282, now seen corresponding path program 7 times [2024-05-12 10:48:11,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:11,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638509016] [2024-05-12 10:48:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:11,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:12,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638509016] [2024-05-12 10:48:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638509016] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:12,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:12,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946263432] [2024-05-12 10:48:12,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:12,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:12,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:12,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 304 transitions, 3586 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:12,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:12,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:12,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:13,132 INFO L124 PetriNetUnfolderBase]: 2981/5268 cut-off events. [2024-05-12 10:48:13,133 INFO L125 PetriNetUnfolderBase]: For 233395/233404 co-relation queries the response was YES. [2024-05-12 10:48:13,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30962 conditions, 5268 events. 2981/5268 cut-off events. For 233395/233404 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37068 event pairs, 1011 based on Foata normal form. 1/5092 useless extension candidates. Maximal degree in co-relation 30851. Up to 4535 conditions per place. [2024-05-12 10:48:13,194 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 277 selfloop transitions, 28 changer transitions 0/321 dead transitions. [2024-05-12 10:48:13,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 321 transitions, 4309 flow [2024-05-12 10:48:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 10:48:13,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539358600583091 [2024-05-12 10:48:13,196 INFO L175 Difference]: Start difference. First operand has 269 places, 304 transitions, 3586 flow. Second operand 7 states and 190 transitions. [2024-05-12 10:48:13,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 321 transitions, 4309 flow [2024-05-12 10:48:14,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 321 transitions, 4133 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:14,062 INFO L231 Difference]: Finished difference. Result has 271 places, 310 transitions, 3565 flow [2024-05-12 10:48:14,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3410, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3565, PETRI_PLACES=271, PETRI_TRANSITIONS=310} [2024-05-12 10:48:14,062 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 218 predicate places. [2024-05-12 10:48:14,063 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 310 transitions, 3565 flow [2024-05-12 10:48:14,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:14,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:14,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:14,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 10:48:14,063 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:14,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash 105667550, now seen corresponding path program 8 times [2024-05-12 10:48:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:14,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61145248] [2024-05-12 10:48:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:14,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:14,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61145248] [2024-05-12 10:48:14,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61145248] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:14,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:14,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:14,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891988435] [2024-05-12 10:48:14,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:14,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:14,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:14,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 310 transitions, 3565 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:14,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:14,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:14,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:15,182 INFO L124 PetriNetUnfolderBase]: 2987/5275 cut-off events. [2024-05-12 10:48:15,182 INFO L125 PetriNetUnfolderBase]: For 239067/239076 co-relation queries the response was YES. [2024-05-12 10:48:15,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30958 conditions, 5275 events. 2987/5275 cut-off events. For 239067/239076 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37175 event pairs, 1026 based on Foata normal form. 1/5093 useless extension candidates. Maximal degree in co-relation 30846. Up to 4444 conditions per place. [2024-05-12 10:48:15,240 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 229 selfloop transitions, 81 changer transitions 0/326 dead transitions. [2024-05-12 10:48:15,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 326 transitions, 4535 flow [2024-05-12 10:48:15,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:48:15,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 10:48:15,242 INFO L175 Difference]: Start difference. First operand has 271 places, 310 transitions, 3565 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:48:15,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 326 transitions, 4535 flow [2024-05-12 10:48:16,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 326 transitions, 4457 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 10:48:16,089 INFO L231 Difference]: Finished difference. Result has 274 places, 313 transitions, 3699 flow [2024-05-12 10:48:16,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3699, PETRI_PLACES=274, PETRI_TRANSITIONS=313} [2024-05-12 10:48:16,090 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 221 predicate places. [2024-05-12 10:48:16,090 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 313 transitions, 3699 flow [2024-05-12 10:48:16,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:16,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:16,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:16,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 10:48:16,091 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:16,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash 114238430, now seen corresponding path program 9 times [2024-05-12 10:48:16,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:16,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693683528] [2024-05-12 10:48:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:16,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:16,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:16,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693683528] [2024-05-12 10:48:16,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693683528] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:16,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:16,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:16,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737184795] [2024-05-12 10:48:16,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:16,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:16,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:16,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 313 transitions, 3699 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:16,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:16,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:16,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:17,277 INFO L124 PetriNetUnfolderBase]: 3002/5299 cut-off events. [2024-05-12 10:48:17,277 INFO L125 PetriNetUnfolderBase]: For 248368/248377 co-relation queries the response was YES. [2024-05-12 10:48:17,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31403 conditions, 5299 events. 3002/5299 cut-off events. For 248368/248377 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37356 event pairs, 1026 based on Foata normal form. 1/5115 useless extension candidates. Maximal degree in co-relation 31290. Up to 4461 conditions per place. [2024-05-12 10:48:17,340 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 228 selfloop transitions, 89 changer transitions 0/333 dead transitions. [2024-05-12 10:48:17,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 333 transitions, 4772 flow [2024-05-12 10:48:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:48:17,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 10:48:17,342 INFO L175 Difference]: Start difference. First operand has 274 places, 313 transitions, 3699 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:48:17,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 333 transitions, 4772 flow [2024-05-12 10:48:18,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 333 transitions, 4528 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:18,171 INFO L231 Difference]: Finished difference. Result has 276 places, 320 transitions, 3768 flow [2024-05-12 10:48:18,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3768, PETRI_PLACES=276, PETRI_TRANSITIONS=320} [2024-05-12 10:48:18,171 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 223 predicate places. [2024-05-12 10:48:18,171 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 320 transitions, 3768 flow [2024-05-12 10:48:18,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:18,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:18,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:18,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 10:48:18,172 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:18,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:18,173 INFO L85 PathProgramCache]: Analyzing trace with hash 278157440, now seen corresponding path program 10 times [2024-05-12 10:48:18,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:18,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271970083] [2024-05-12 10:48:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:18,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:18,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:18,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271970083] [2024-05-12 10:48:18,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271970083] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:18,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:18,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:18,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479584707] [2024-05-12 10:48:18,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:18,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:18,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:18,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:18,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 320 transitions, 3768 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:18,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:18,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:18,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:19,371 INFO L124 PetriNetUnfolderBase]: 2999/5295 cut-off events. [2024-05-12 10:48:19,371 INFO L125 PetriNetUnfolderBase]: For 251005/251014 co-relation queries the response was YES. [2024-05-12 10:48:19,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31330 conditions, 5295 events. 2999/5295 cut-off events. For 251005/251014 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37365 event pairs, 1026 based on Foata normal form. 1/5111 useless extension candidates. Maximal degree in co-relation 31216. Up to 4458 conditions per place. [2024-05-12 10:48:19,435 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 229 selfloop transitions, 88 changer transitions 0/333 dead transitions. [2024-05-12 10:48:19,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 333 transitions, 4716 flow [2024-05-12 10:48:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:19,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:48:19,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 10:48:19,437 INFO L175 Difference]: Start difference. First operand has 276 places, 320 transitions, 3768 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:48:19,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 333 transitions, 4716 flow [2024-05-12 10:48:20,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 333 transitions, 4540 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 10:48:20,464 INFO L231 Difference]: Finished difference. Result has 280 places, 320 transitions, 3774 flow [2024-05-12 10:48:20,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3774, PETRI_PLACES=280, PETRI_TRANSITIONS=320} [2024-05-12 10:48:20,465 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 227 predicate places. [2024-05-12 10:48:20,465 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 320 transitions, 3774 flow [2024-05-12 10:48:20,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:20,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:20,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:20,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 10:48:20,466 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:20,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:20,466 INFO L85 PathProgramCache]: Analyzing trace with hash -227645704, now seen corresponding path program 11 times [2024-05-12 10:48:20,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:20,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472459137] [2024-05-12 10:48:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:20,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:20,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:20,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472459137] [2024-05-12 10:48:20,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472459137] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:20,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:20,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:20,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734511176] [2024-05-12 10:48:20,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:20,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:20,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:20,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:20,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:20,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:20,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 320 transitions, 3774 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:20,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:20,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:20,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:21,800 INFO L124 PetriNetUnfolderBase]: 2996/5294 cut-off events. [2024-05-12 10:48:21,800 INFO L125 PetriNetUnfolderBase]: For 254237/254246 co-relation queries the response was YES. [2024-05-12 10:48:21,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31291 conditions, 5294 events. 2996/5294 cut-off events. For 254237/254246 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37308 event pairs, 1011 based on Foata normal form. 1/5115 useless extension candidates. Maximal degree in co-relation 31176. Up to 4542 conditions per place. [2024-05-12 10:48:21,880 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 276 selfloop transitions, 40 changer transitions 0/332 dead transitions. [2024-05-12 10:48:21,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 332 transitions, 4578 flow [2024-05-12 10:48:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:48:21,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568513119533528 [2024-05-12 10:48:21,881 INFO L175 Difference]: Start difference. First operand has 280 places, 320 transitions, 3774 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:48:21,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 332 transitions, 4578 flow [2024-05-12 10:48:22,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 332 transitions, 4368 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:22,835 INFO L231 Difference]: Finished difference. Result has 282 places, 320 transitions, 3650 flow [2024-05-12 10:48:22,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3650, PETRI_PLACES=282, PETRI_TRANSITIONS=320} [2024-05-12 10:48:22,836 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 229 predicate places. [2024-05-12 10:48:22,836 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 320 transitions, 3650 flow [2024-05-12 10:48:22,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:22,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:22,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:22,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 10:48:22,836 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:22,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1878875102, now seen corresponding path program 12 times [2024-05-12 10:48:22,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:22,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096572756] [2024-05-12 10:48:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:22,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:23,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:23,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096572756] [2024-05-12 10:48:23,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096572756] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:23,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:23,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:23,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433275234] [2024-05-12 10:48:23,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:23,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:23,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:23,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:23,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:23,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 320 transitions, 3650 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:23,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:23,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:23,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:23,975 INFO L124 PetriNetUnfolderBase]: 2993/5290 cut-off events. [2024-05-12 10:48:23,975 INFO L125 PetriNetUnfolderBase]: For 256867/256876 co-relation queries the response was YES. [2024-05-12 10:48:24,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31127 conditions, 5290 events. 2993/5290 cut-off events. For 256867/256876 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37200 event pairs, 1011 based on Foata normal form. 1/5111 useless extension candidates. Maximal degree in co-relation 31011. Up to 4539 conditions per place. [2024-05-12 10:48:24,034 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 276 selfloop transitions, 41 changer transitions 0/333 dead transitions. [2024-05-12 10:48:24,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 333 transitions, 4314 flow [2024-05-12 10:48:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:48:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:48:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-05-12 10:48:24,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351473922902494 [2024-05-12 10:48:24,036 INFO L175 Difference]: Start difference. First operand has 282 places, 320 transitions, 3650 flow. Second operand 9 states and 236 transitions. [2024-05-12 10:48:24,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 333 transitions, 4314 flow [2024-05-12 10:48:24,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 333 transitions, 4150 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-05-12 10:48:24,921 INFO L231 Difference]: Finished difference. Result has 284 places, 320 transitions, 3574 flow [2024-05-12 10:48:24,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3574, PETRI_PLACES=284, PETRI_TRANSITIONS=320} [2024-05-12 10:48:24,922 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 231 predicate places. [2024-05-12 10:48:24,922 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 320 transitions, 3574 flow [2024-05-12 10:48:24,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:24,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:24,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:24,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 10:48:24,923 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:24,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash 114249342, now seen corresponding path program 2 times [2024-05-12 10:48:24,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:24,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849714100] [2024-05-12 10:48:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:24,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:25,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:25,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849714100] [2024-05-12 10:48:25,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849714100] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:25,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:25,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:25,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848169230] [2024-05-12 10:48:25,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:25,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:25,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:25,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:25,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:25,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:48:25,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 320 transitions, 3574 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:25,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:25,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:48:25,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:26,087 INFO L124 PetriNetUnfolderBase]: 2906/5232 cut-off events. [2024-05-12 10:48:26,088 INFO L125 PetriNetUnfolderBase]: For 286527/286549 co-relation queries the response was YES. [2024-05-12 10:48:26,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30675 conditions, 5232 events. 2906/5232 cut-off events. For 286527/286549 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 37578 event pairs, 990 based on Foata normal form. 20/5037 useless extension candidates. Maximal degree in co-relation 30560. Up to 4183 conditions per place. [2024-05-12 10:48:26,148 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 239 selfloop transitions, 37 changer transitions 0/338 dead transitions. [2024-05-12 10:48:26,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 338 transitions, 4212 flow [2024-05-12 10:48:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:26,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:48:26,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5830903790087464 [2024-05-12 10:48:26,149 INFO L175 Difference]: Start difference. First operand has 284 places, 320 transitions, 3574 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:48:26,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 338 transitions, 4212 flow [2024-05-12 10:48:27,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 338 transitions, 4102 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-05-12 10:48:27,011 INFO L231 Difference]: Finished difference. Result has 283 places, 321 transitions, 3566 flow [2024-05-12 10:48:27,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3566, PETRI_PLACES=283, PETRI_TRANSITIONS=321} [2024-05-12 10:48:27,011 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 230 predicate places. [2024-05-12 10:48:27,012 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 321 transitions, 3566 flow [2024-05-12 10:48:27,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:27,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:27,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:27,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 10:48:27,012 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:27,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1888797024, now seen corresponding path program 3 times [2024-05-12 10:48:27,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:27,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897241976] [2024-05-12 10:48:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:27,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:27,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:27,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897241976] [2024-05-12 10:48:27,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897241976] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:27,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:27,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:27,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189368320] [2024-05-12 10:48:27,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:27,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:27,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:27,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:48:27,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 321 transitions, 3566 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:27,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:27,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:48:27,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:28,302 INFO L124 PetriNetUnfolderBase]: 2981/5399 cut-off events. [2024-05-12 10:48:28,303 INFO L125 PetriNetUnfolderBase]: For 296566/296586 co-relation queries the response was YES. [2024-05-12 10:48:28,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31809 conditions, 5399 events. 2981/5399 cut-off events. For 296566/296586 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 39140 event pairs, 1012 based on Foata normal form. 17/5198 useless extension candidates. Maximal degree in co-relation 31693. Up to 4344 conditions per place. [2024-05-12 10:48:28,369 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 261 selfloop transitions, 16 changer transitions 0/339 dead transitions. [2024-05-12 10:48:28,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 339 transitions, 4208 flow [2024-05-12 10:48:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:48:28,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 10:48:28,371 INFO L175 Difference]: Start difference. First operand has 283 places, 321 transitions, 3566 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:48:28,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 339 transitions, 4208 flow [2024-05-12 10:48:29,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 339 transitions, 4128 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:29,514 INFO L231 Difference]: Finished difference. Result has 285 places, 322 transitions, 3548 flow [2024-05-12 10:48:29,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3548, PETRI_PLACES=285, PETRI_TRANSITIONS=322} [2024-05-12 10:48:29,515 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 232 predicate places. [2024-05-12 10:48:29,515 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 322 transitions, 3548 flow [2024-05-12 10:48:29,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:29,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:29,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:29,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 10:48:29,516 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:29,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1369886388, now seen corresponding path program 4 times [2024-05-12 10:48:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:29,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128474609] [2024-05-12 10:48:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:29,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:29,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:29,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128474609] [2024-05-12 10:48:29,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128474609] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:29,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:29,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:29,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803149287] [2024-05-12 10:48:29,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:29,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:29,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:29,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:48:30,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 322 transitions, 3548 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:30,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:30,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:48:30,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:30,828 INFO L124 PetriNetUnfolderBase]: 3003/5448 cut-off events. [2024-05-12 10:48:30,828 INFO L125 PetriNetUnfolderBase]: For 286219/286239 co-relation queries the response was YES. [2024-05-12 10:48:30,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31622 conditions, 5448 events. 3003/5448 cut-off events. For 286219/286239 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 39580 event pairs, 1007 based on Foata normal form. 16/5250 useless extension candidates. Maximal degree in co-relation 31505. Up to 4307 conditions per place. [2024-05-12 10:48:30,894 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 265 selfloop transitions, 19 changer transitions 0/346 dead transitions. [2024-05-12 10:48:30,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 346 transitions, 4234 flow [2024-05-12 10:48:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:48:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:48:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-05-12 10:48:30,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 10:48:30,895 INFO L175 Difference]: Start difference. First operand has 285 places, 322 transitions, 3548 flow. Second operand 8 states and 224 transitions. [2024-05-12 10:48:30,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 346 transitions, 4234 flow [2024-05-12 10:48:32,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 346 transitions, 4194 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:32,280 INFO L231 Difference]: Finished difference. Result has 288 places, 323 transitions, 3576 flow [2024-05-12 10:48:32,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3576, PETRI_PLACES=288, PETRI_TRANSITIONS=323} [2024-05-12 10:48:32,280 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 235 predicate places. [2024-05-12 10:48:32,281 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 323 transitions, 3576 flow [2024-05-12 10:48:32,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:32,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:32,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:32,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 10:48:32,281 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:32,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:32,282 INFO L85 PathProgramCache]: Analyzing trace with hash 993393554, now seen corresponding path program 1 times [2024-05-12 10:48:32,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:32,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134769295] [2024-05-12 10:48:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:32,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:32,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:32,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134769295] [2024-05-12 10:48:32,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134769295] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:32,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:32,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:32,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115555220] [2024-05-12 10:48:32,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:32,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:32,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:32,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:48:32,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 323 transitions, 3576 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:32,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:32,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:48:32,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:33,588 INFO L124 PetriNetUnfolderBase]: 3219/5817 cut-off events. [2024-05-12 10:48:33,589 INFO L125 PetriNetUnfolderBase]: For 329326/329341 co-relation queries the response was YES. [2024-05-12 10:48:33,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34784 conditions, 5817 events. 3219/5817 cut-off events. For 329326/329341 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42860 event pairs, 990 based on Foata normal form. 8/5623 useless extension candidates. Maximal degree in co-relation 34666. Up to 4616 conditions per place. [2024-05-12 10:48:33,660 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 280 selfloop transitions, 19 changer transitions 0/358 dead transitions. [2024-05-12 10:48:33,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 358 transitions, 4486 flow [2024-05-12 10:48:33,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:48:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:48:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-05-12 10:48:33,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5969387755102041 [2024-05-12 10:48:33,661 INFO L175 Difference]: Start difference. First operand has 288 places, 323 transitions, 3576 flow. Second operand 8 states and 234 transitions. [2024-05-12 10:48:33,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 358 transitions, 4486 flow [2024-05-12 10:48:34,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 358 transitions, 4434 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 10:48:34,674 INFO L231 Difference]: Finished difference. Result has 290 places, 325 transitions, 3604 flow [2024-05-12 10:48:34,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3604, PETRI_PLACES=290, PETRI_TRANSITIONS=325} [2024-05-12 10:48:34,674 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 237 predicate places. [2024-05-12 10:48:34,674 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 325 transitions, 3604 flow [2024-05-12 10:48:34,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:34,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:34,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:34,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 10:48:34,675 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:34,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 217309056, now seen corresponding path program 2 times [2024-05-12 10:48:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:34,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240050951] [2024-05-12 10:48:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:34,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240050951] [2024-05-12 10:48:35,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240050951] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:35,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:35,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:35,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698801520] [2024-05-12 10:48:35,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:35,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:48:35,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 325 transitions, 3604 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:35,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:35,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:48:35,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:36,046 INFO L124 PetriNetUnfolderBase]: 3197/5768 cut-off events. [2024-05-12 10:48:36,047 INFO L125 PetriNetUnfolderBase]: For 310578/310593 co-relation queries the response was YES. [2024-05-12 10:48:36,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33694 conditions, 5768 events. 3197/5768 cut-off events. For 310578/310593 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 42385 event pairs, 1042 based on Foata normal form. 9/5574 useless extension candidates. Maximal degree in co-relation 33575. Up to 4696 conditions per place. [2024-05-12 10:48:36,126 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 273 selfloop transitions, 16 changer transitions 0/348 dead transitions. [2024-05-12 10:48:36,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 348 transitions, 4266 flow [2024-05-12 10:48:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:48:36,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889212827988338 [2024-05-12 10:48:36,128 INFO L175 Difference]: Start difference. First operand has 290 places, 325 transitions, 3604 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:48:36,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 348 transitions, 4266 flow [2024-05-12 10:48:37,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 348 transitions, 4236 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 10:48:37,413 INFO L231 Difference]: Finished difference. Result has 293 places, 325 transitions, 3612 flow [2024-05-12 10:48:37,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3612, PETRI_PLACES=293, PETRI_TRANSITIONS=325} [2024-05-12 10:48:37,413 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 240 predicate places. [2024-05-12 10:48:37,413 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 325 transitions, 3612 flow [2024-05-12 10:48:37,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:37,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:37,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:37,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 10:48:37,414 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:37,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:37,414 INFO L85 PathProgramCache]: Analyzing trace with hash 501035870, now seen corresponding path program 3 times [2024-05-12 10:48:37,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:37,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007409133] [2024-05-12 10:48:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:37,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:37,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:37,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007409133] [2024-05-12 10:48:37,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007409133] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:37,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:37,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:37,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315859870] [2024-05-12 10:48:37,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:37,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:37,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:37,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:48:37,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 325 transitions, 3612 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:37,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:37,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:48:37,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:38,678 INFO L124 PetriNetUnfolderBase]: 3285/5920 cut-off events. [2024-05-12 10:48:38,678 INFO L125 PetriNetUnfolderBase]: For 319085/319101 co-relation queries the response was YES. [2024-05-12 10:48:38,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34596 conditions, 5920 events. 3285/5920 cut-off events. For 319085/319101 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 43856 event pairs, 1076 based on Foata normal form. 10/5718 useless extension candidates. Maximal degree in co-relation 34475. Up to 4795 conditions per place. [2024-05-12 10:48:38,747 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 248 selfloop transitions, 39 changer transitions 0/346 dead transitions. [2024-05-12 10:48:38,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 346 transitions, 4282 flow [2024-05-12 10:48:38,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:48:38,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-05-12 10:48:38,748 INFO L175 Difference]: Start difference. First operand has 293 places, 325 transitions, 3612 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:48:38,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 346 transitions, 4282 flow [2024-05-12 10:48:39,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 346 transitions, 4245 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 10:48:39,451 INFO L231 Difference]: Finished difference. Result has 294 places, 326 transitions, 3681 flow [2024-05-12 10:48:39,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3681, PETRI_PLACES=294, PETRI_TRANSITIONS=326} [2024-05-12 10:48:39,452 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 241 predicate places. [2024-05-12 10:48:39,452 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 326 transitions, 3681 flow [2024-05-12 10:48:39,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:39,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:39,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:39,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 10:48:39,453 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:39,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:39,453 INFO L85 PathProgramCache]: Analyzing trace with hash 507715998, now seen corresponding path program 1 times [2024-05-12 10:48:39,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:39,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089588620] [2024-05-12 10:48:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:39,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:39,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:39,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089588620] [2024-05-12 10:48:39,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089588620] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:39,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:39,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:39,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568152165] [2024-05-12 10:48:39,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:39,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:39,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:39,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:39,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:39,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:39,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 326 transitions, 3681 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:39,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:39,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:39,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:40,746 INFO L124 PetriNetUnfolderBase]: 3490/6163 cut-off events. [2024-05-12 10:48:40,747 INFO L125 PetriNetUnfolderBase]: For 301746/301767 co-relation queries the response was YES. [2024-05-12 10:48:40,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36032 conditions, 6163 events. 3490/6163 cut-off events. For 301746/301767 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 44860 event pairs, 1171 based on Foata normal form. 11/5969 useless extension candidates. Maximal degree in co-relation 35910. Up to 5303 conditions per place. [2024-05-12 10:48:40,825 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 302 selfloop transitions, 27 changer transitions 0/345 dead transitions. [2024-05-12 10:48:40,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 345 transitions, 4419 flow [2024-05-12 10:48:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:48:40,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685131195335277 [2024-05-12 10:48:40,827 INFO L175 Difference]: Start difference. First operand has 294 places, 326 transitions, 3681 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:48:40,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 345 transitions, 4419 flow [2024-05-12 10:48:41,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 345 transitions, 4337 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:41,666 INFO L231 Difference]: Finished difference. Result has 296 places, 328 transitions, 3698 flow [2024-05-12 10:48:41,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3698, PETRI_PLACES=296, PETRI_TRANSITIONS=328} [2024-05-12 10:48:41,667 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 243 predicate places. [2024-05-12 10:48:41,667 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 328 transitions, 3698 flow [2024-05-12 10:48:41,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:41,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:41,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:41,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 10:48:41,668 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:41,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash -707313646, now seen corresponding path program 4 times [2024-05-12 10:48:41,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:41,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805686509] [2024-05-12 10:48:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:41,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:42,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:42,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805686509] [2024-05-12 10:48:42,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805686509] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:42,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:42,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:42,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278055542] [2024-05-12 10:48:42,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:42,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:42,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:42,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:42,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:42,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 10:48:42,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 328 transitions, 3698 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:42,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:42,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 10:48:42,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:42,934 INFO L124 PetriNetUnfolderBase]: 3349/6034 cut-off events. [2024-05-12 10:48:42,934 INFO L125 PetriNetUnfolderBase]: For 322803/322827 co-relation queries the response was YES. [2024-05-12 10:48:42,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35286 conditions, 6034 events. 3349/6034 cut-off events. For 322803/322827 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 44823 event pairs, 1101 based on Foata normal form. 19/5838 useless extension candidates. Maximal degree in co-relation 35163. Up to 4897 conditions per place. [2024-05-12 10:48:43,006 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 247 selfloop transitions, 40 changer transitions 0/346 dead transitions. [2024-05-12 10:48:43,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 346 transitions, 4364 flow [2024-05-12 10:48:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:48:43,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5830903790087464 [2024-05-12 10:48:43,008 INFO L175 Difference]: Start difference. First operand has 296 places, 328 transitions, 3698 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:48:43,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 346 transitions, 4364 flow [2024-05-12 10:48:44,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 346 transitions, 4281 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:44,071 INFO L231 Difference]: Finished difference. Result has 298 places, 329 transitions, 3727 flow [2024-05-12 10:48:44,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3727, PETRI_PLACES=298, PETRI_TRANSITIONS=329} [2024-05-12 10:48:44,071 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 245 predicate places. [2024-05-12 10:48:44,071 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 329 transitions, 3727 flow [2024-05-12 10:48:44,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:44,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:44,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:44,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 10:48:44,072 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:44,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1233224256, now seen corresponding path program 2 times [2024-05-12 10:48:44,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:44,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138501566] [2024-05-12 10:48:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:44,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:44,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:44,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138501566] [2024-05-12 10:48:44,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138501566] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:44,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:44,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:44,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587305121] [2024-05-12 10:48:44,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:44,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:44,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:44,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:44,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:44,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:44,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 329 transitions, 3727 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:44,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:44,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:44,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:45,364 INFO L124 PetriNetUnfolderBase]: 3554/6253 cut-off events. [2024-05-12 10:48:45,364 INFO L125 PetriNetUnfolderBase]: For 303531/303543 co-relation queries the response was YES. [2024-05-12 10:48:45,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36583 conditions, 6253 events. 3554/6253 cut-off events. For 303531/303543 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 45528 event pairs, 1200 based on Foata normal form. 2/6040 useless extension candidates. Maximal degree in co-relation 36459. Up to 5403 conditions per place. [2024-05-12 10:48:45,436 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 302 selfloop transitions, 27 changer transitions 0/345 dead transitions. [2024-05-12 10:48:45,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 345 transitions, 4463 flow [2024-05-12 10:48:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:45,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-05-12 10:48:45,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597667638483965 [2024-05-12 10:48:45,437 INFO L175 Difference]: Start difference. First operand has 298 places, 329 transitions, 3727 flow. Second operand 7 states and 192 transitions. [2024-05-12 10:48:45,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 345 transitions, 4463 flow [2024-05-12 10:48:46,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 345 transitions, 4375 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:46,491 INFO L231 Difference]: Finished difference. Result has 300 places, 331 transitions, 3744 flow [2024-05-12 10:48:46,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3639, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3744, PETRI_PLACES=300, PETRI_TRANSITIONS=331} [2024-05-12 10:48:46,492 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 247 predicate places. [2024-05-12 10:48:46,492 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 331 transitions, 3744 flow [2024-05-12 10:48:46,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:46,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:46,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:46,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 10:48:46,493 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:46,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:46,493 INFO L85 PathProgramCache]: Analyzing trace with hash -227390698, now seen corresponding path program 3 times [2024-05-12 10:48:46,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:46,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147664965] [2024-05-12 10:48:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:46,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:46,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:46,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147664965] [2024-05-12 10:48:46,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147664965] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:46,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:46,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:46,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002968138] [2024-05-12 10:48:46,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:46,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:46,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:46,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:46,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:46,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:46,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 331 transitions, 3744 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:46,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:46,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:46,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:47,885 INFO L124 PetriNetUnfolderBase]: 3575/6289 cut-off events. [2024-05-12 10:48:47,885 INFO L125 PetriNetUnfolderBase]: For 309817/309829 co-relation queries the response was YES. [2024-05-12 10:48:47,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36796 conditions, 6289 events. 3575/6289 cut-off events. For 309817/309829 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45873 event pairs, 1209 based on Foata normal form. 2/6074 useless extension candidates. Maximal degree in co-relation 36671. Up to 5434 conditions per place. [2024-05-12 10:48:47,961 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 303 selfloop transitions, 28 changer transitions 0/347 dead transitions. [2024-05-12 10:48:47,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 347 transitions, 4488 flow [2024-05-12 10:48:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:48:47,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568513119533528 [2024-05-12 10:48:47,962 INFO L175 Difference]: Start difference. First operand has 300 places, 331 transitions, 3744 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:48:47,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 347 transitions, 4488 flow [2024-05-12 10:48:48,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 347 transitions, 4399 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:48,798 INFO L231 Difference]: Finished difference. Result has 302 places, 333 transitions, 3766 flow [2024-05-12 10:48:48,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3766, PETRI_PLACES=302, PETRI_TRANSITIONS=333} [2024-05-12 10:48:48,798 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 249 predicate places. [2024-05-12 10:48:48,798 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 333 transitions, 3766 flow [2024-05-12 10:48:48,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:48,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:48,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:48,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 10:48:48,799 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:48,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1832768286, now seen corresponding path program 4 times [2024-05-12 10:48:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:48,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453529736] [2024-05-12 10:48:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:49,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:49,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453529736] [2024-05-12 10:48:49,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453529736] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:49,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:49,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:48:49,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265490163] [2024-05-12 10:48:49,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:49,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:48:49,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:48:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:48:49,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:49,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 333 transitions, 3766 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:49,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:49,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:49,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:50,122 INFO L124 PetriNetUnfolderBase]: 3570/6336 cut-off events. [2024-05-12 10:48:50,122 INFO L125 PetriNetUnfolderBase]: For 310134/310146 co-relation queries the response was YES. [2024-05-12 10:48:50,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36731 conditions, 6336 events. 3570/6336 cut-off events. For 310134/310146 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 46561 event pairs, 1153 based on Foata normal form. 2/6127 useless extension candidates. Maximal degree in co-relation 36605. Up to 5364 conditions per place. [2024-05-12 10:48:50,196 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 301 selfloop transitions, 35 changer transitions 0/352 dead transitions. [2024-05-12 10:48:50,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 352 transitions, 4534 flow [2024-05-12 10:48:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 10:48:50,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565597667638484 [2024-05-12 10:48:50,197 INFO L175 Difference]: Start difference. First operand has 302 places, 333 transitions, 3766 flow. Second operand 7 states and 194 transitions. [2024-05-12 10:48:50,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 352 transitions, 4534 flow [2024-05-12 10:48:51,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 352 transitions, 4439 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:51,433 INFO L231 Difference]: Finished difference. Result has 304 places, 335 transitions, 3800 flow [2024-05-12 10:48:51,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3671, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3800, PETRI_PLACES=304, PETRI_TRANSITIONS=335} [2024-05-12 10:48:51,434 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 251 predicate places. [2024-05-12 10:48:51,434 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 335 transitions, 3800 flow [2024-05-12 10:48:51,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:51,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:51,434 INFO 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] [2024-05-12 10:48:51,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 10:48:51,435 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:51,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2014759869, now seen corresponding path program 1 times [2024-05-12 10:48:51,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:51,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151513865] [2024-05-12 10:48:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:51,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:51,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:51,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151513865] [2024-05-12 10:48:51,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151513865] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:51,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:51,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:48:51,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802107526] [2024-05-12 10:48:51,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:51,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:48:51,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:51,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:48:51,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:48:51,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:51,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 335 transitions, 3800 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:51,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:51,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:51,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:52,973 INFO L124 PetriNetUnfolderBase]: 3643/6464 cut-off events. [2024-05-12 10:48:52,973 INFO L125 PetriNetUnfolderBase]: For 331588/331600 co-relation queries the response was YES. [2024-05-12 10:48:53,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38001 conditions, 6464 events. 3643/6464 cut-off events. For 331588/331600 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 47265 event pairs, 933 based on Foata normal form. 2/6250 useless extension candidates. Maximal degree in co-relation 37874. Up to 5248 conditions per place. [2024-05-12 10:48:53,055 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 310 selfloop transitions, 55 changer transitions 0/381 dead transitions. [2024-05-12 10:48:53,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 381 transitions, 5111 flow [2024-05-12 10:48:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:48:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:48:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-05-12 10:48:53,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-05-12 10:48:53,057 INFO L175 Difference]: Start difference. First operand has 304 places, 335 transitions, 3800 flow. Second operand 8 states and 240 transitions. [2024-05-12 10:48:53,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 381 transitions, 5111 flow [2024-05-12 10:48:54,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 381 transitions, 4998 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-05-12 10:48:54,227 INFO L231 Difference]: Finished difference. Result has 308 places, 342 transitions, 3935 flow [2024-05-12 10:48:54,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3935, PETRI_PLACES=308, PETRI_TRANSITIONS=342} [2024-05-12 10:48:54,227 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 255 predicate places. [2024-05-12 10:48:54,227 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 342 transitions, 3935 flow [2024-05-12 10:48:54,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:54,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:54,228 INFO 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] [2024-05-12 10:48:54,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 10:48:54,228 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:54,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:54,228 INFO L85 PathProgramCache]: Analyzing trace with hash -860445823, now seen corresponding path program 2 times [2024-05-12 10:48:54,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:54,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765364685] [2024-05-12 10:48:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:54,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:54,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:54,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765364685] [2024-05-12 10:48:54,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765364685] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:54,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:54,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:48:54,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622899584] [2024-05-12 10:48:54,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:54,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:48:54,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:54,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:48:54,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:48:54,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:54,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 342 transitions, 3935 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:54,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:54,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:54,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:55,843 INFO L124 PetriNetUnfolderBase]: 3690/6549 cut-off events. [2024-05-12 10:48:55,843 INFO L125 PetriNetUnfolderBase]: For 348680/348692 co-relation queries the response was YES. [2024-05-12 10:48:55,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39074 conditions, 6549 events. 3690/6549 cut-off events. For 348680/348692 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 48133 event pairs, 933 based on Foata normal form. 2/6333 useless extension candidates. Maximal degree in co-relation 38945. Up to 5292 conditions per place. [2024-05-12 10:48:55,921 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 308 selfloop transitions, 58 changer transitions 0/382 dead transitions. [2024-05-12 10:48:55,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 382 transitions, 5206 flow [2024-05-12 10:48:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:48:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:48:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-05-12 10:48:55,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045918367346939 [2024-05-12 10:48:55,922 INFO L175 Difference]: Start difference. First operand has 308 places, 342 transitions, 3935 flow. Second operand 8 states and 237 transitions. [2024-05-12 10:48:55,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 382 transitions, 5206 flow [2024-05-12 10:48:56,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 382 transitions, 5037 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-05-12 10:48:56,820 INFO L231 Difference]: Finished difference. Result has 314 places, 347 transitions, 4006 flow [2024-05-12 10:48:56,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3808, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4006, PETRI_PLACES=314, PETRI_TRANSITIONS=347} [2024-05-12 10:48:56,820 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 261 predicate places. [2024-05-12 10:48:56,821 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 347 transitions, 4006 flow [2024-05-12 10:48:56,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:56,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:56,821 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, 1, 1] [2024-05-12 10:48:56,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 10:48:56,821 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:56,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2072852319, now seen corresponding path program 3 times [2024-05-12 10:48:56,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:56,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240532511] [2024-05-12 10:48:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:56,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:57,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:57,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240532511] [2024-05-12 10:48:57,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240532511] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:57,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:57,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:48:57,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72444578] [2024-05-12 10:48:57,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:57,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:48:57,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:48:57,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:48:57,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:48:57,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 347 transitions, 4006 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:57,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:57,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:48:57,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:58,600 INFO L124 PetriNetUnfolderBase]: 3685/6506 cut-off events. [2024-05-12 10:48:58,601 INFO L125 PetriNetUnfolderBase]: For 344052/344064 co-relation queries the response was YES. [2024-05-12 10:48:58,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38543 conditions, 6506 events. 3685/6506 cut-off events. For 344052/344064 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 47942 event pairs, 1176 based on Foata normal form. 2/6282 useless extension candidates. Maximal degree in co-relation 38411. Up to 5487 conditions per place. [2024-05-12 10:48:58,690 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 315 selfloop transitions, 46 changer transitions 0/377 dead transitions. [2024-05-12 10:48:58,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 377 transitions, 4982 flow [2024-05-12 10:48:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:48:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:48:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 10:48:58,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60932944606414 [2024-05-12 10:48:58,692 INFO L175 Difference]: Start difference. First operand has 314 places, 347 transitions, 4006 flow. Second operand 7 states and 209 transitions. [2024-05-12 10:48:58,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 377 transitions, 4982 flow [2024-05-12 10:48:59,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 377 transitions, 4866 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 10:48:59,904 INFO L231 Difference]: Finished difference. Result has 317 places, 347 transitions, 3987 flow [2024-05-12 10:48:59,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3987, PETRI_PLACES=317, PETRI_TRANSITIONS=347} [2024-05-12 10:48:59,905 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 264 predicate places. [2024-05-12 10:48:59,905 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 347 transitions, 3987 flow [2024-05-12 10:48:59,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:59,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:59,906 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, 1] [2024-05-12 10:48:59,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 10:48:59,906 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:59,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash -970341153, now seen corresponding path program 4 times [2024-05-12 10:48:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:59,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479122106] [2024-05-12 10:48:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:59,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:00,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:00,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479122106] [2024-05-12 10:49:00,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479122106] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:00,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:00,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:49:00,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789033700] [2024-05-12 10:49:00,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:00,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:49:00,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:49:00,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:49:00,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:00,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 347 transitions, 3987 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:00,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:00,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:00,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:01,413 INFO L124 PetriNetUnfolderBase]: 3706/6524 cut-off events. [2024-05-12 10:49:01,413 INFO L125 PetriNetUnfolderBase]: For 351154/351166 co-relation queries the response was YES. [2024-05-12 10:49:01,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38604 conditions, 6524 events. 3706/6524 cut-off events. For 351154/351166 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 48064 event pairs, 1197 based on Foata normal form. 2/6300 useless extension candidates. Maximal degree in co-relation 38471. Up to 5574 conditions per place. [2024-05-12 10:49:01,496 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 311 selfloop transitions, 45 changer transitions 0/372 dead transitions. [2024-05-12 10:49:01,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 372 transitions, 4787 flow [2024-05-12 10:49:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:49:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:49:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:49:01,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-05-12 10:49:01,498 INFO L175 Difference]: Start difference. First operand has 317 places, 347 transitions, 3987 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:49:01,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 372 transitions, 4787 flow [2024-05-12 10:49:02,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 372 transitions, 4668 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 10:49:02,877 INFO L231 Difference]: Finished difference. Result has 318 places, 349 transitions, 3995 flow [2024-05-12 10:49:02,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3874, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3995, PETRI_PLACES=318, PETRI_TRANSITIONS=349} [2024-05-12 10:49:02,878 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 265 predicate places. [2024-05-12 10:49:02,878 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 349 transitions, 3995 flow [2024-05-12 10:49:02,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:02,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:02,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:49:02,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 10:49:02,878 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:02,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:02,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1711620129, now seen corresponding path program 5 times [2024-05-12 10:49:02,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:02,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747046237] [2024-05-12 10:49:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:02,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:03,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747046237] [2024-05-12 10:49:03,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747046237] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:03,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:03,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:03,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753757180] [2024-05-12 10:49:03,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:03,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:03,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:03,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:03,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:03,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 349 transitions, 3995 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:03,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:03,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:03,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:04,579 INFO L124 PetriNetUnfolderBase]: 3727/6560 cut-off events. [2024-05-12 10:49:04,579 INFO L125 PetriNetUnfolderBase]: For 357918/357930 co-relation queries the response was YES. [2024-05-12 10:49:04,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38790 conditions, 6560 events. 3727/6560 cut-off events. For 357918/357930 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 48307 event pairs, 1199 based on Foata normal form. 2/6334 useless extension candidates. Maximal degree in co-relation 38656. Up to 5605 conditions per place. [2024-05-12 10:49:04,661 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 313 selfloop transitions, 47 changer transitions 0/376 dead transitions. [2024-05-12 10:49:04,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 376 transitions, 4805 flow [2024-05-12 10:49:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:49:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:49:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-05-12 10:49:04,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691609977324263 [2024-05-12 10:49:04,662 INFO L175 Difference]: Start difference. First operand has 318 places, 349 transitions, 3995 flow. Second operand 9 states and 251 transitions. [2024-05-12 10:49:04,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 376 transitions, 4805 flow [2024-05-12 10:49:06,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 376 transitions, 4708 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:49:06,167 INFO L231 Difference]: Finished difference. Result has 322 places, 351 transitions, 4027 flow [2024-05-12 10:49:06,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4027, PETRI_PLACES=322, PETRI_TRANSITIONS=351} [2024-05-12 10:49:06,167 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 269 predicate places. [2024-05-12 10:49:06,168 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 351 transitions, 4027 flow [2024-05-12 10:49:06,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:06,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:06,168 INFO 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] [2024-05-12 10:49:06,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 10:49:06,168 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:06,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1215628349, now seen corresponding path program 6 times [2024-05-12 10:49:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:06,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133111843] [2024-05-12 10:49:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:06,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:06,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:06,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133111843] [2024-05-12 10:49:06,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133111843] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:06,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:06,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:06,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286428353] [2024-05-12 10:49:06,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:06,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:06,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:06,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:06,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:06,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 351 transitions, 4027 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:06,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:06,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:06,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:07,936 INFO L124 PetriNetUnfolderBase]: 3748/6605 cut-off events. [2024-05-12 10:49:07,936 INFO L125 PetriNetUnfolderBase]: For 365083/365095 co-relation queries the response was YES. [2024-05-12 10:49:08,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39074 conditions, 6605 events. 3748/6605 cut-off events. For 365083/365095 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 48858 event pairs, 1199 based on Foata normal form. 2/6379 useless extension candidates. Maximal degree in co-relation 38939. Up to 5587 conditions per place. [2024-05-12 10:49:08,028 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 312 selfloop transitions, 53 changer transitions 0/381 dead transitions. [2024-05-12 10:49:08,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 381 transitions, 4855 flow [2024-05-12 10:49:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:49:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:49:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-05-12 10:49:08,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736961451247166 [2024-05-12 10:49:08,029 INFO L175 Difference]: Start difference. First operand has 322 places, 351 transitions, 4027 flow. Second operand 9 states and 253 transitions. [2024-05-12 10:49:08,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 381 transitions, 4855 flow [2024-05-12 10:49:09,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 381 transitions, 4750 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-05-12 10:49:09,814 INFO L231 Difference]: Finished difference. Result has 324 places, 353 transitions, 4061 flow [2024-05-12 10:49:09,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3922, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4061, PETRI_PLACES=324, PETRI_TRANSITIONS=353} [2024-05-12 10:49:09,815 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 271 predicate places. [2024-05-12 10:49:09,815 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 353 transitions, 4061 flow [2024-05-12 10:49:09,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:09,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:09,815 INFO 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] [2024-05-12 10:49:09,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 10:49:09,816 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:09,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:09,816 INFO L85 PathProgramCache]: Analyzing trace with hash 470097693, now seen corresponding path program 1 times [2024-05-12 10:49:09,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:09,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730590236] [2024-05-12 10:49:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:09,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:10,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:10,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730590236] [2024-05-12 10:49:10,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730590236] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:10,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:10,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:10,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38527732] [2024-05-12 10:49:10,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:10,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:10,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:10,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:10,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:10,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 353 transitions, 4061 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:10,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:10,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:10,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:11,521 INFO L124 PetriNetUnfolderBase]: 3755/6611 cut-off events. [2024-05-12 10:49:11,521 INFO L125 PetriNetUnfolderBase]: For 368347/368359 co-relation queries the response was YES. [2024-05-12 10:49:11,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39286 conditions, 6611 events. 3755/6611 cut-off events. For 368347/368359 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48875 event pairs, 1206 based on Foata normal form. 1/6381 useless extension candidates. Maximal degree in co-relation 39150. Up to 5670 conditions per place. [2024-05-12 10:49:11,618 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 336 selfloop transitions, 27 changer transitions 0/379 dead transitions. [2024-05-12 10:49:11,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 379 transitions, 4901 flow [2024-05-12 10:49:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:49:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:49:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:49:11,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889212827988338 [2024-05-12 10:49:11,620 INFO L175 Difference]: Start difference. First operand has 324 places, 353 transitions, 4061 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:49:11,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 379 transitions, 4901 flow [2024-05-12 10:49:13,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 379 transitions, 4788 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 10:49:13,743 INFO L231 Difference]: Finished difference. Result has 324 places, 356 transitions, 4074 flow [2024-05-12 10:49:13,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3948, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4074, PETRI_PLACES=324, PETRI_TRANSITIONS=356} [2024-05-12 10:49:13,744 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 271 predicate places. [2024-05-12 10:49:13,744 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 356 transitions, 4074 flow [2024-05-12 10:49:13,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:13,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:13,745 INFO 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] [2024-05-12 10:49:13,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 10:49:13,745 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:13,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:13,745 INFO L85 PathProgramCache]: Analyzing trace with hash 474859293, now seen corresponding path program 2 times [2024-05-12 10:49:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:13,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376088580] [2024-05-12 10:49:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:13,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:14,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:14,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376088580] [2024-05-12 10:49:14,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376088580] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:14,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:14,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:14,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60978592] [2024-05-12 10:49:14,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:14,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:14,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:14,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:14,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:14,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:14,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 356 transitions, 4074 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:14,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:14,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:14,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:15,493 INFO L124 PetriNetUnfolderBase]: 3772/6638 cut-off events. [2024-05-12 10:49:15,493 INFO L125 PetriNetUnfolderBase]: For 380213/380225 co-relation queries the response was YES. [2024-05-12 10:49:15,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39696 conditions, 6638 events. 3772/6638 cut-off events. For 380213/380225 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49034 event pairs, 1207 based on Foata normal form. 1/6403 useless extension candidates. Maximal degree in co-relation 39559. Up to 5639 conditions per place. [2024-05-12 10:49:15,578 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 303 selfloop transitions, 64 changer transitions 0/383 dead transitions. [2024-05-12 10:49:15,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 383 transitions, 5168 flow [2024-05-12 10:49:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:49:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:49:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-05-12 10:49:15,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.597667638483965 [2024-05-12 10:49:15,580 INFO L175 Difference]: Start difference. First operand has 324 places, 356 transitions, 4074 flow. Second operand 7 states and 205 transitions. [2024-05-12 10:49:15,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 383 transitions, 5168 flow [2024-05-12 10:49:17,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 383 transitions, 5088 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-05-12 10:49:17,119 INFO L231 Difference]: Finished difference. Result has 327 places, 362 transitions, 4262 flow [2024-05-12 10:49:17,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3994, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4262, PETRI_PLACES=327, PETRI_TRANSITIONS=362} [2024-05-12 10:49:17,119 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 274 predicate places. [2024-05-12 10:49:17,119 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 362 transitions, 4262 flow [2024-05-12 10:49:17,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:17,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:17,120 INFO 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] [2024-05-12 10:49:17,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-05-12 10:49:17,121 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:17,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash -999758011, now seen corresponding path program 3 times [2024-05-12 10:49:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:17,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355621154] [2024-05-12 10:49:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:17,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:17,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:17,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355621154] [2024-05-12 10:49:17,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355621154] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:17,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:17,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:49:17,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547704785] [2024-05-12 10:49:17,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:17,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:49:17,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:49:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:49:17,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:17,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 362 transitions, 4262 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:17,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:17,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:17,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:18,745 INFO L124 PetriNetUnfolderBase]: 3779/6649 cut-off events. [2024-05-12 10:49:18,746 INFO L125 PetriNetUnfolderBase]: For 389272/389284 co-relation queries the response was YES. [2024-05-12 10:49:18,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40079 conditions, 6649 events. 3779/6649 cut-off events. For 389272/389284 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49122 event pairs, 1207 based on Foata normal form. 1/6412 useless extension candidates. Maximal degree in co-relation 39941. Up to 5647 conditions per place. [2024-05-12 10:49:18,842 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 303 selfloop transitions, 69 changer transitions 0/388 dead transitions. [2024-05-12 10:49:18,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 388 transitions, 5316 flow [2024-05-12 10:49:18,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:49:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:49:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-05-12 10:49:18,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736961451247166 [2024-05-12 10:49:18,843 INFO L175 Difference]: Start difference. First operand has 327 places, 362 transitions, 4262 flow. Second operand 9 states and 253 transitions. [2024-05-12 10:49:18,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 388 transitions, 5316 flow [2024-05-12 10:49:20,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 388 transitions, 5207 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-05-12 10:49:20,727 INFO L231 Difference]: Finished difference. Result has 332 places, 365 transitions, 4371 flow [2024-05-12 10:49:20,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4371, PETRI_PLACES=332, PETRI_TRANSITIONS=365} [2024-05-12 10:49:20,728 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 279 predicate places. [2024-05-12 10:49:20,728 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 365 transitions, 4371 flow [2024-05-12 10:49:20,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:20,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:20,728 INFO 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] [2024-05-12 10:49:20,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-05-12 10:49:20,729 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:20,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:20,736 INFO L85 PathProgramCache]: Analyzing trace with hash -970329249, now seen corresponding path program 1 times [2024-05-12 10:49:20,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:20,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825727178] [2024-05-12 10:49:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:20,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:21,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:21,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825727178] [2024-05-12 10:49:21,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825727178] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:21,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:21,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:21,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216723552] [2024-05-12 10:49:21,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:21,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:21,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:21,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:21,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:21,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 365 transitions, 4371 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:21,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:21,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:21,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:22,395 INFO L124 PetriNetUnfolderBase]: 3796/6676 cut-off events. [2024-05-12 10:49:22,396 INFO L125 PetriNetUnfolderBase]: For 394213/394234 co-relation queries the response was YES. [2024-05-12 10:49:22,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40504 conditions, 6676 events. 3796/6676 cut-off events. For 394213/394234 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49339 event pairs, 1207 based on Foata normal form. 10/6446 useless extension candidates. Maximal degree in co-relation 40365. Up to 5654 conditions per place. [2024-05-12 10:49:22,499 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 300 selfloop transitions, 76 changer transitions 0/392 dead transitions. [2024-05-12 10:49:22,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 392 transitions, 5489 flow [2024-05-12 10:49:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:49:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:49:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-05-12 10:49:22,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005830903790087 [2024-05-12 10:49:22,500 INFO L175 Difference]: Start difference. First operand has 332 places, 365 transitions, 4371 flow. Second operand 7 states and 206 transitions. [2024-05-12 10:49:22,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 392 transitions, 5489 flow [2024-05-12 10:49:24,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 392 transitions, 5305 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-05-12 10:49:24,634 INFO L231 Difference]: Finished difference. Result has 331 places, 371 transitions, 4485 flow [2024-05-12 10:49:24,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4189, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4485, PETRI_PLACES=331, PETRI_TRANSITIONS=371} [2024-05-12 10:49:24,635 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 278 predicate places. [2024-05-12 10:49:24,635 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 371 transitions, 4485 flow [2024-05-12 10:49:24,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:24,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:24,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:49:24,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-05-12 10:49:24,635 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:24,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1700537505, now seen corresponding path program 2 times [2024-05-12 10:49:24,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:24,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928290862] [2024-05-12 10:49:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:24,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:25,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:25,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928290862] [2024-05-12 10:49:25,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928290862] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:25,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:25,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:25,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399918378] [2024-05-12 10:49:25,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:25,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:25,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:25,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:25,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:25,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:25,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 371 transitions, 4485 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:25,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:25,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:25,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:26,455 INFO L124 PetriNetUnfolderBase]: 3813/6702 cut-off events. [2024-05-12 10:49:26,456 INFO L125 PetriNetUnfolderBase]: For 400207/400228 co-relation queries the response was YES. [2024-05-12 10:49:26,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40951 conditions, 6702 events. 3813/6702 cut-off events. For 400207/400228 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49518 event pairs, 1207 based on Foata normal form. 10/6468 useless extension candidates. Maximal degree in co-relation 40812. Up to 5673 conditions per place. [2024-05-12 10:49:26,529 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 301 selfloop transitions, 84 changer transitions 0/401 dead transitions. [2024-05-12 10:49:26,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 401 transitions, 5825 flow [2024-05-12 10:49:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:49:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:49:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2024-05-12 10:49:26,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-05-12 10:49:26,530 INFO L175 Difference]: Start difference. First operand has 331 places, 371 transitions, 4485 flow. Second operand 9 states and 258 transitions. [2024-05-12 10:49:26,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 401 transitions, 5825 flow [2024-05-12 10:49:28,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 401 transitions, 5678 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-05-12 10:49:28,725 INFO L231 Difference]: Finished difference. Result has 336 places, 377 transitions, 4660 flow [2024-05-12 10:49:28,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4374, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4660, PETRI_PLACES=336, PETRI_TRANSITIONS=377} [2024-05-12 10:49:28,725 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 283 predicate places. [2024-05-12 10:49:28,726 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 377 transitions, 4660 flow [2024-05-12 10:49:28,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:28,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:28,726 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] [2024-05-12 10:49:28,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-05-12 10:49:28,726 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:28,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:28,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1296353975, now seen corresponding path program 3 times [2024-05-12 10:49:28,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:28,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471168312] [2024-05-12 10:49:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:28,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:29,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:29,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471168312] [2024-05-12 10:49:29,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471168312] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:29,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:29,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:29,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280391474] [2024-05-12 10:49:29,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:29,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:29,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:29,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:29,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 377 transitions, 4660 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:29,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:29,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:29,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:30,377 INFO L124 PetriNetUnfolderBase]: 3810/6698 cut-off events. [2024-05-12 10:49:30,377 INFO L125 PetriNetUnfolderBase]: For 395582/395603 co-relation queries the response was YES. [2024-05-12 10:49:30,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40914 conditions, 6698 events. 3810/6698 cut-off events. For 395582/395603 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49438 event pairs, 1207 based on Foata normal form. 10/6464 useless extension candidates. Maximal degree in co-relation 40774. Up to 5670 conditions per place. [2024-05-12 10:49:30,469 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 297 selfloop transitions, 88 changer transitions 0/401 dead transitions. [2024-05-12 10:49:30,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 401 transitions, 5674 flow [2024-05-12 10:49:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:49:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:49:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2024-05-12 10:49:30,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673469387755102 [2024-05-12 10:49:30,471 INFO L175 Difference]: Start difference. First operand has 336 places, 377 transitions, 4660 flow. Second operand 10 states and 278 transitions. [2024-05-12 10:49:30,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 401 transitions, 5674 flow [2024-05-12 10:49:32,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 401 transitions, 5452 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-05-12 10:49:32,109 INFO L231 Difference]: Finished difference. Result has 339 places, 377 transitions, 4626 flow [2024-05-12 10:49:32,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4626, PETRI_PLACES=339, PETRI_TRANSITIONS=377} [2024-05-12 10:49:32,112 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 286 predicate places. [2024-05-12 10:49:32,112 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 377 transitions, 4626 flow [2024-05-12 10:49:32,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:32,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:32,112 INFO 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] [2024-05-12 10:49:32,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-05-12 10:49:32,113 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:32,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:32,113 INFO L85 PathProgramCache]: Analyzing trace with hash 653776669, now seen corresponding path program 1 times [2024-05-12 10:49:32,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:32,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8606959] [2024-05-12 10:49:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:32,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:32,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:32,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8606959] [2024-05-12 10:49:32,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8606959] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:32,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:32,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:32,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829474660] [2024-05-12 10:49:32,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:32,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:32,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:32,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 377 transitions, 4626 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:32,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:32,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:32,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:33,826 INFO L124 PetriNetUnfolderBase]: 3863/6924 cut-off events. [2024-05-12 10:49:33,826 INFO L125 PetriNetUnfolderBase]: For 419304/419322 co-relation queries the response was YES. [2024-05-12 10:49:33,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41611 conditions, 6924 events. 3863/6924 cut-off events. For 419304/419322 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 51498 event pairs, 1043 based on Foata normal form. 15/6697 useless extension candidates. Maximal degree in co-relation 41471. Up to 5276 conditions per place. [2024-05-12 10:49:33,923 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 355 selfloop transitions, 43 changer transitions 0/414 dead transitions. [2024-05-12 10:49:33,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 414 transitions, 5782 flow [2024-05-12 10:49:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:49:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:49:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-05-12 10:49:33,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209912536443148 [2024-05-12 10:49:33,924 INFO L175 Difference]: Start difference. First operand has 339 places, 377 transitions, 4626 flow. Second operand 7 states and 213 transitions. [2024-05-12 10:49:33,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 414 transitions, 5782 flow [2024-05-12 10:49:35,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 414 transitions, 5580 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-05-12 10:49:35,618 INFO L231 Difference]: Finished difference. Result has 336 places, 378 transitions, 4542 flow [2024-05-12 10:49:35,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4426, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4542, PETRI_PLACES=336, PETRI_TRANSITIONS=378} [2024-05-12 10:49:35,619 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 283 predicate places. [2024-05-12 10:49:35,619 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 378 transitions, 4542 flow [2024-05-12 10:49:35,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:35,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:35,620 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, 1] [2024-05-12 10:49:35,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-05-12 10:49:35,620 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:35,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2015244289, now seen corresponding path program 2 times [2024-05-12 10:49:35,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:35,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996968197] [2024-05-12 10:49:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:35,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:36,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:36,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996968197] [2024-05-12 10:49:36,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996968197] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:36,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:36,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:36,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520876351] [2024-05-12 10:49:36,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:36,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:36,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:36,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:36,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 378 transitions, 4542 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:36,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:36,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:36,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:37,194 INFO L124 PetriNetUnfolderBase]: 3916/6895 cut-off events. [2024-05-12 10:49:37,194 INFO L125 PetriNetUnfolderBase]: For 422714/422732 co-relation queries the response was YES. [2024-05-12 10:49:37,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42271 conditions, 6895 events. 3916/6895 cut-off events. For 422714/422732 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 51268 event pairs, 1231 based on Foata normal form. 15/6668 useless extension candidates. Maximal degree in co-relation 42131. Up to 5726 conditions per place. [2024-05-12 10:49:37,295 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 354 selfloop transitions, 38 changer transitions 0/408 dead transitions. [2024-05-12 10:49:37,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 408 transitions, 5482 flow [2024-05-12 10:49:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:49:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:49:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-05-12 10:49:37,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064139941690962 [2024-05-12 10:49:37,296 INFO L175 Difference]: Start difference. First operand has 336 places, 378 transitions, 4542 flow. Second operand 7 states and 208 transitions. [2024-05-12 10:49:37,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 408 transitions, 5482 flow [2024-05-12 10:49:39,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 408 transitions, 5397 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 10:49:39,063 INFO L231 Difference]: Finished difference. Result has 339 places, 379 transitions, 4567 flow [2024-05-12 10:49:39,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4567, PETRI_PLACES=339, PETRI_TRANSITIONS=379} [2024-05-12 10:49:39,063 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 286 predicate places. [2024-05-12 10:49:39,063 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 379 transitions, 4567 flow [2024-05-12 10:49:39,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:39,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:39,064 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, 1, 1] [2024-05-12 10:49:39,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-05-12 10:49:39,064 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:39,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:39,065 INFO L85 PathProgramCache]: Analyzing trace with hash -143586371, now seen corresponding path program 7 times [2024-05-12 10:49:39,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:39,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498843468] [2024-05-12 10:49:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:39,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:39,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:39,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498843468] [2024-05-12 10:49:39,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498843468] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:39,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:39,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:39,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046092046] [2024-05-12 10:49:39,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:39,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:39,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:39,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:39,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 379 transitions, 4567 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:39,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:39,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:39,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:40,825 INFO L124 PetriNetUnfolderBase]: 3963/6985 cut-off events. [2024-05-12 10:49:40,825 INFO L125 PetriNetUnfolderBase]: For 422628/422640 co-relation queries the response was YES. [2024-05-12 10:49:40,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42779 conditions, 6985 events. 3963/6985 cut-off events. For 422628/422640 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 52146 event pairs, 1259 based on Foata normal form. 2/6730 useless extension candidates. Maximal degree in co-relation 42638. Up to 5817 conditions per place. [2024-05-12 10:49:40,935 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 319 selfloop transitions, 94 changer transitions 0/429 dead transitions. [2024-05-12 10:49:40,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 429 transitions, 5807 flow [2024-05-12 10:49:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:49:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:49:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 294 transitions. [2024-05-12 10:49:40,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 10:49:40,937 INFO L175 Difference]: Start difference. First operand has 339 places, 379 transitions, 4567 flow. Second operand 10 states and 294 transitions. [2024-05-12 10:49:40,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 429 transitions, 5807 flow [2024-05-12 10:49:43,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 429 transitions, 5713 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 10:49:43,620 INFO L231 Difference]: Finished difference. Result has 345 places, 384 transitions, 4788 flow [2024-05-12 10:49:43,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4788, PETRI_PLACES=345, PETRI_TRANSITIONS=384} [2024-05-12 10:49:43,621 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 292 predicate places. [2024-05-12 10:49:43,621 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 384 transitions, 4788 flow [2024-05-12 10:49:43,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:43,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:43,621 INFO 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] [2024-05-12 10:49:43,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-05-12 10:49:43,622 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:43,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash -134063171, now seen corresponding path program 8 times [2024-05-12 10:49:43,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:43,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844406059] [2024-05-12 10:49:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:43,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:44,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844406059] [2024-05-12 10:49:44,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844406059] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:44,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:44,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873110337] [2024-05-12 10:49:44,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:44,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:44,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:44,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:44,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 384 transitions, 4788 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:44,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:44,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:44,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:45,534 INFO L124 PetriNetUnfolderBase]: 3984/7003 cut-off events. [2024-05-12 10:49:45,534 INFO L125 PetriNetUnfolderBase]: For 432803/432815 co-relation queries the response was YES. [2024-05-12 10:49:45,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43304 conditions, 7003 events. 3984/7003 cut-off events. For 432803/432815 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 52238 event pairs, 1280 based on Foata normal form. 2/6748 useless extension candidates. Maximal degree in co-relation 43161. Up to 5907 conditions per place. [2024-05-12 10:49:45,623 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 316 selfloop transitions, 92 changer transitions 0/424 dead transitions. [2024-05-12 10:49:45,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 424 transitions, 5754 flow [2024-05-12 10:49:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:49:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:49:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 287 transitions. [2024-05-12 10:49:45,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-05-12 10:49:45,625 INFO L175 Difference]: Start difference. First operand has 345 places, 384 transitions, 4788 flow. Second operand 10 states and 287 transitions. [2024-05-12 10:49:45,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 424 transitions, 5754 flow [2024-05-12 10:49:48,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 424 transitions, 5535 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-05-12 10:49:48,700 INFO L231 Difference]: Finished difference. Result has 349 places, 386 transitions, 4814 flow [2024-05-12 10:49:48,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4599, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4814, PETRI_PLACES=349, PETRI_TRANSITIONS=386} [2024-05-12 10:49:48,701 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 296 predicate places. [2024-05-12 10:49:48,701 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 386 transitions, 4814 flow [2024-05-12 10:49:48,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:48,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:48,702 INFO 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] [2024-05-12 10:49:48,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-05-12 10:49:48,703 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:48,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:48,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2036810819, now seen corresponding path program 9 times [2024-05-12 10:49:48,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:48,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621864605] [2024-05-12 10:49:48,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:48,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:49,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:49,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621864605] [2024-05-12 10:49:49,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621864605] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:49,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:49,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:49,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496596090] [2024-05-12 10:49:49,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:49,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:49,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:49,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 386 transitions, 4814 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:49,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:49,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:49,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:50,392 INFO L124 PetriNetUnfolderBase]: 4005/7039 cut-off events. [2024-05-12 10:49:50,392 INFO L125 PetriNetUnfolderBase]: For 436031/436043 co-relation queries the response was YES. [2024-05-12 10:49:50,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43144 conditions, 7039 events. 4005/7039 cut-off events. For 436031/436043 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 52552 event pairs, 1282 based on Foata normal form. 2/6782 useless extension candidates. Maximal degree in co-relation 42999. Up to 5938 conditions per place. [2024-05-12 10:49:50,487 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 314 selfloop transitions, 94 changer transitions 0/424 dead transitions. [2024-05-12 10:49:50,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 424 transitions, 5748 flow [2024-05-12 10:49:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:49:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:49:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 306 transitions. [2024-05-12 10:49:50,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677179962894249 [2024-05-12 10:49:50,488 INFO L175 Difference]: Start difference. First operand has 349 places, 386 transitions, 4814 flow. Second operand 11 states and 306 transitions. [2024-05-12 10:49:50,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 424 transitions, 5748 flow [2024-05-12 10:49:53,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 424 transitions, 5555 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 10:49:53,836 INFO L231 Difference]: Finished difference. Result has 352 places, 388 transitions, 4844 flow [2024-05-12 10:49:53,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4621, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4844, PETRI_PLACES=352, PETRI_TRANSITIONS=388} [2024-05-12 10:49:53,837 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 299 predicate places. [2024-05-12 10:49:53,837 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 388 transitions, 4844 flow [2024-05-12 10:49:53,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:53,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:53,837 INFO 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] [2024-05-12 10:49:53,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-05-12 10:49:53,837 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:53,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1679973315, now seen corresponding path program 10 times [2024-05-12 10:49:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:53,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484302829] [2024-05-12 10:49:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:54,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:54,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484302829] [2024-05-12 10:49:54,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484302829] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:54,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:54,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:49:54,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042927324] [2024-05-12 10:49:54,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:54,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:49:54,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:54,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:49:54,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:49:54,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:54,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 388 transitions, 4844 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:54,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:54,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:54,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:49:55,544 INFO L124 PetriNetUnfolderBase]: 4026/7075 cut-off events. [2024-05-12 10:49:55,544 INFO L125 PetriNetUnfolderBase]: For 444345/444357 co-relation queries the response was YES. [2024-05-12 10:49:55,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43444 conditions, 7075 events. 4026/7075 cut-off events. For 444345/444357 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 52897 event pairs, 1284 based on Foata normal form. 2/6816 useless extension candidates. Maximal degree in co-relation 43298. Up to 5969 conditions per place. [2024-05-12 10:49:55,643 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 310 selfloop transitions, 94 changer transitions 0/420 dead transitions. [2024-05-12 10:49:55,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 420 transitions, 5758 flow [2024-05-12 10:49:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:49:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:49:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 300 transitions. [2024-05-12 10:49:55,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565862708719852 [2024-05-12 10:49:55,644 INFO L175 Difference]: Start difference. First operand has 352 places, 388 transitions, 4844 flow. Second operand 11 states and 300 transitions. [2024-05-12 10:49:55,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 420 transitions, 5758 flow [2024-05-12 10:49:58,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 420 transitions, 5557 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-05-12 10:49:58,963 INFO L231 Difference]: Finished difference. Result has 354 places, 390 transitions, 4870 flow [2024-05-12 10:49:58,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4870, PETRI_PLACES=354, PETRI_TRANSITIONS=390} [2024-05-12 10:49:58,964 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 301 predicate places. [2024-05-12 10:49:58,964 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 390 transitions, 4870 flow [2024-05-12 10:49:58,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:58,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:49:58,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:49:58,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-05-12 10:49:58,965 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:49:58,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:49:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1506478179, now seen corresponding path program 4 times [2024-05-12 10:49:58,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:49:58,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716719254] [2024-05-12 10:49:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:49:58,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:49:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:49:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:49:59,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:49:59,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716719254] [2024-05-12 10:49:59,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716719254] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:49:59,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:49:59,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:49:59,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752747459] [2024-05-12 10:49:59,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:49:59,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:49:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:49:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:49:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:49:59,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:49:59,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 390 transitions, 4870 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:49:59,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:49:59,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:49:59,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:01,059 INFO L124 PetriNetUnfolderBase]: 4046/7106 cut-off events. [2024-05-12 10:50:01,060 INFO L125 PetriNetUnfolderBase]: For 448116/448137 co-relation queries the response was YES. [2024-05-12 10:50:01,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43726 conditions, 7106 events. 4046/7106 cut-off events. For 448116/448137 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 53040 event pairs, 1285 based on Foata normal form. 10/6854 useless extension candidates. Maximal degree in co-relation 43579. Up to 5995 conditions per place. [2024-05-12 10:50:01,140 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 366 selfloop transitions, 52 changer transitions 0/434 dead transitions. [2024-05-12 10:50:01,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 434 transitions, 5908 flow [2024-05-12 10:50:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:50:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:50:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 288 transitions. [2024-05-12 10:50:01,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877551020408164 [2024-05-12 10:50:01,141 INFO L175 Difference]: Start difference. First operand has 354 places, 390 transitions, 4870 flow. Second operand 10 states and 288 transitions. [2024-05-12 10:50:01,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 434 transitions, 5908 flow [2024-05-12 10:50:05,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 434 transitions, 5703 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-05-12 10:50:05,128 INFO L231 Difference]: Finished difference. Result has 355 places, 396 transitions, 4887 flow [2024-05-12 10:50:05,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4887, PETRI_PLACES=355, PETRI_TRANSITIONS=396} [2024-05-12 10:50:05,128 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 302 predicate places. [2024-05-12 10:50:05,128 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 396 transitions, 4887 flow [2024-05-12 10:50:05,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:05,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:50:05,129 INFO 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] [2024-05-12 10:50:05,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-05-12 10:50:05,129 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:50:05,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:50:05,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1501716579, now seen corresponding path program 5 times [2024-05-12 10:50:05,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:50:05,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483906715] [2024-05-12 10:50:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:50:05,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:50:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:50:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:50:05,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:50:05,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483906715] [2024-05-12 10:50:05,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483906715] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:50:05,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:50:05,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:50:05,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957980628] [2024-05-12 10:50:05,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:50:05,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:50:05,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:50:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:50:05,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:50:05,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:50:05,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 396 transitions, 4887 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:05,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:50:05,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:50:05,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:06,941 INFO L124 PetriNetUnfolderBase]: 4073/7150 cut-off events. [2024-05-12 10:50:06,942 INFO L125 PetriNetUnfolderBase]: For 467978/467996 co-relation queries the response was YES. [2024-05-12 10:50:07,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44448 conditions, 7150 events. 4073/7150 cut-off events. For 467978/467996 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 53407 event pairs, 1291 based on Foata normal form. 7/6887 useless extension candidates. Maximal degree in co-relation 44300. Up to 5845 conditions per place. [2024-05-12 10:50:07,056 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 273 selfloop transitions, 158 changer transitions 0/447 dead transitions. [2024-05-12 10:50:07,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 447 transitions, 6949 flow [2024-05-12 10:50:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:50:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:50:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 296 transitions. [2024-05-12 10:50:07,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-05-12 10:50:07,057 INFO L175 Difference]: Start difference. First operand has 355 places, 396 transitions, 4887 flow. Second operand 10 states and 296 transitions. [2024-05-12 10:50:07,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 447 transitions, 6949 flow [2024-05-12 10:50:11,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 447 transitions, 6799 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-05-12 10:50:11,296 INFO L231 Difference]: Finished difference. Result has 359 places, 408 transitions, 5377 flow [2024-05-12 10:50:11,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5377, PETRI_PLACES=359, PETRI_TRANSITIONS=408} [2024-05-12 10:50:11,309 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 306 predicate places. [2024-05-12 10:50:11,310 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 408 transitions, 5377 flow [2024-05-12 10:50:11,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:11,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:50:11,310 INFO 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] [2024-05-12 10:50:11,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-05-12 10:50:11,310 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:50:11,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:50:11,311 INFO L85 PathProgramCache]: Analyzing trace with hash 604811165, now seen corresponding path program 6 times [2024-05-12 10:50:11,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:50:11,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926808907] [2024-05-12 10:50:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:50:11,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:50:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:50:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:50:11,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:50:11,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926808907] [2024-05-12 10:50:11,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926808907] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:50:11,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:50:11,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:50:11,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996084866] [2024-05-12 10:50:11,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:50:11,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:50:11,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:50:11,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:50:11,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:50:11,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:50:11,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 408 transitions, 5377 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:11,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:50:11,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:50:11,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:13,066 INFO L124 PetriNetUnfolderBase]: 4080/7158 cut-off events. [2024-05-12 10:50:13,066 INFO L125 PetriNetUnfolderBase]: For 478867/478888 co-relation queries the response was YES. [2024-05-12 10:50:13,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44986 conditions, 7158 events. 4080/7158 cut-off events. For 478867/478888 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 53473 event pairs, 1285 based on Foata normal form. 10/6898 useless extension candidates. Maximal degree in co-relation 44837. Up to 6026 conditions per place. [2024-05-12 10:50:13,175 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 374 selfloop transitions, 66 changer transitions 0/456 dead transitions. [2024-05-12 10:50:13,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 456 transitions, 6653 flow [2024-05-12 10:50:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:50:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:50:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 359 transitions. [2024-05-12 10:50:13,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5635792778649922 [2024-05-12 10:50:13,176 INFO L175 Difference]: Start difference. First operand has 359 places, 408 transitions, 5377 flow. Second operand 13 states and 359 transitions. [2024-05-12 10:50:13,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 456 transitions, 6653 flow [2024-05-12 10:50:16,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 456 transitions, 6355 flow, removed 101 selfloop flow, removed 3 redundant places. [2024-05-12 10:50:16,784 INFO L231 Difference]: Finished difference. Result has 370 places, 411 transitions, 5311 flow [2024-05-12 10:50:16,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5311, PETRI_PLACES=370, PETRI_TRANSITIONS=411} [2024-05-12 10:50:16,785 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 317 predicate places. [2024-05-12 10:50:16,785 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 411 transitions, 5311 flow [2024-05-12 10:50:16,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:16,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:50:16,785 INFO 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] [2024-05-12 10:50:16,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-05-12 10:50:16,786 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:50:16,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:50:16,786 INFO L85 PathProgramCache]: Analyzing trace with hash 616239005, now seen corresponding path program 7 times [2024-05-12 10:50:16,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:50:16,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329082120] [2024-05-12 10:50:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:50:16,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:50:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:50:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:50:17,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:50:17,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329082120] [2024-05-12 10:50:17,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329082120] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:50:17,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:50:17,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:50:17,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929144731] [2024-05-12 10:50:17,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:50:17,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:50:17,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:50:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:50:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:50:17,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:50:17,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 411 transitions, 5311 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:17,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:50:17,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:50:17,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:18,968 INFO L124 PetriNetUnfolderBase]: 4077/7154 cut-off events. [2024-05-12 10:50:18,968 INFO L125 PetriNetUnfolderBase]: For 479853/479874 co-relation queries the response was YES. [2024-05-12 10:50:19,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44885 conditions, 7154 events. 4077/7154 cut-off events. For 479853/479874 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 53458 event pairs, 1285 based on Foata normal form. 10/6894 useless extension candidates. Maximal degree in co-relation 44733. Up to 6023 conditions per place. [2024-05-12 10:50:19,065 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 368 selfloop transitions, 66 changer transitions 0/450 dead transitions. [2024-05-12 10:50:19,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 450 transitions, 6277 flow [2024-05-12 10:50:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:50:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:50:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 309 transitions. [2024-05-12 10:50:19,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732838589981447 [2024-05-12 10:50:19,067 INFO L175 Difference]: Start difference. First operand has 370 places, 411 transitions, 5311 flow. Second operand 11 states and 309 transitions. [2024-05-12 10:50:19,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 450 transitions, 6277 flow [2024-05-12 10:50:22,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 450 transitions, 6093 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-05-12 10:50:22,503 INFO L231 Difference]: Finished difference. Result has 371 places, 411 transitions, 5265 flow [2024-05-12 10:50:22,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5265, PETRI_PLACES=371, PETRI_TRANSITIONS=411} [2024-05-12 10:50:22,504 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 318 predicate places. [2024-05-12 10:50:22,504 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 411 transitions, 5265 flow [2024-05-12 10:50:22,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:22,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:50:22,504 INFO 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] [2024-05-12 10:50:22,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-05-12 10:50:22,505 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:50:22,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:50:22,505 INFO L85 PathProgramCache]: Analyzing trace with hash -728272269, now seen corresponding path program 8 times [2024-05-12 10:50:22,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:50:22,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153619265] [2024-05-12 10:50:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:50:22,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:50:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:50:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:50:22,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:50:22,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153619265] [2024-05-12 10:50:22,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153619265] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:50:22,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:50:22,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:50:22,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874386599] [2024-05-12 10:50:22,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:50:22,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:50:22,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:50:22,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:50:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:50:23,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:50:23,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 411 transitions, 5265 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:23,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:50:23,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:50:23,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:24,252 INFO L124 PetriNetUnfolderBase]: 4094/7183 cut-off events. [2024-05-12 10:50:24,253 INFO L125 PetriNetUnfolderBase]: For 493976/493994 co-relation queries the response was YES. [2024-05-12 10:50:24,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45247 conditions, 7183 events. 4094/7183 cut-off events. For 493976/493994 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 53615 event pairs, 1291 based on Foata normal form. 7/6914 useless extension candidates. Maximal degree in co-relation 45094. Up to 5869 conditions per place. [2024-05-12 10:50:24,356 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 266 selfloop transitions, 171 changer transitions 0/453 dead transitions. [2024-05-12 10:50:24,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 453 transitions, 6963 flow [2024-05-12 10:50:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:50:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:50:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 315 transitions. [2024-05-12 10:50:24,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-05-12 10:50:24,358 INFO L175 Difference]: Start difference. First operand has 371 places, 411 transitions, 5265 flow. Second operand 11 states and 315 transitions. [2024-05-12 10:50:24,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 453 transitions, 6963 flow [2024-05-12 10:50:28,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 453 transitions, 6839 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 10:50:28,045 INFO L231 Difference]: Finished difference. Result has 373 places, 417 transitions, 5613 flow [2024-05-12 10:50:28,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5613, PETRI_PLACES=373, PETRI_TRANSITIONS=417} [2024-05-12 10:50:28,046 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 320 predicate places. [2024-05-12 10:50:28,046 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 417 transitions, 5613 flow [2024-05-12 10:50:28,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:28,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:50:28,047 INFO 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] [2024-05-12 10:50:28,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-05-12 10:50:28,048 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:50:28,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:50:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2030139619, now seen corresponding path program 9 times [2024-05-12 10:50:28,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:50:28,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105258612] [2024-05-12 10:50:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:50:28,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:50:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:50:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:50:28,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:50:28,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105258612] [2024-05-12 10:50:28,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105258612] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:50:28,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:50:28,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:50:28,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995814841] [2024-05-12 10:50:28,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:50:28,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:50:28,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:50:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:50:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:50:28,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:50:28,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 417 transitions, 5613 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:28,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:50:28,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:50:28,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:29,782 INFO L124 PetriNetUnfolderBase]: 4091/7179 cut-off events. [2024-05-12 10:50:29,783 INFO L125 PetriNetUnfolderBase]: For 498595/498613 co-relation queries the response was YES. [2024-05-12 10:50:29,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45462 conditions, 7179 events. 4091/7179 cut-off events. For 498595/498613 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 53656 event pairs, 1291 based on Foata normal form. 7/6910 useless extension candidates. Maximal degree in co-relation 45308. Up to 5866 conditions per place. [2024-05-12 10:50:29,893 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 263 selfloop transitions, 174 changer transitions 0/453 dead transitions. [2024-05-12 10:50:29,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 453 transitions, 6987 flow [2024-05-12 10:50:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:50:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:50:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 336 transitions. [2024-05-12 10:50:29,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 10:50:29,895 INFO L175 Difference]: Start difference. First operand has 373 places, 417 transitions, 5613 flow. Second operand 12 states and 336 transitions. [2024-05-12 10:50:29,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 453 transitions, 6987 flow [2024-05-12 10:50:33,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 453 transitions, 6642 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-05-12 10:50:33,491 INFO L231 Difference]: Finished difference. Result has 379 places, 417 transitions, 5622 flow [2024-05-12 10:50:33,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5622, PETRI_PLACES=379, PETRI_TRANSITIONS=417} [2024-05-12 10:50:33,491 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 326 predicate places. [2024-05-12 10:50:33,491 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 417 transitions, 5622 flow [2024-05-12 10:50:33,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:33,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:50:33,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:50:33,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-05-12 10:50:33,492 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:50:33,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:50:33,492 INFO L85 PathProgramCache]: Analyzing trace with hash -134051267, now seen corresponding path program 4 times [2024-05-12 10:50:33,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:50:33,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313997722] [2024-05-12 10:50:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:50:33,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:50:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:50:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:50:33,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:50:33,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313997722] [2024-05-12 10:50:33,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313997722] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:50:33,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:50:33,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:50:33,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856627837] [2024-05-12 10:50:33,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:50:33,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:50:33,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:50:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:50:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:50:33,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:50:33,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 417 transitions, 5622 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:33,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:50:33,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:50:33,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:35,301 INFO L124 PetriNetUnfolderBase]: 4108/7207 cut-off events. [2024-05-12 10:50:35,302 INFO L125 PetriNetUnfolderBase]: For 513514/513537 co-relation queries the response was YES. [2024-05-12 10:50:35,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45861 conditions, 7207 events. 4108/7207 cut-off events. For 513514/513537 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 53852 event pairs, 1288 based on Foata normal form. 8/6937 useless extension candidates. Maximal degree in co-relation 45706. Up to 5958 conditions per place. [2024-05-12 10:50:35,392 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 295 selfloop transitions, 153 changer transitions 0/464 dead transitions. [2024-05-12 10:50:35,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 464 transitions, 7464 flow [2024-05-12 10:50:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:50:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:50:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 294 transitions. [2024-05-12 10:50:35,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 10:50:35,394 INFO L175 Difference]: Start difference. First operand has 379 places, 417 transitions, 5622 flow. Second operand 10 states and 294 transitions. [2024-05-12 10:50:35,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 464 transitions, 7464 flow [2024-05-12 10:50:39,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 464 transitions, 7132 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-05-12 10:50:39,074 INFO L231 Difference]: Finished difference. Result has 379 places, 426 transitions, 5836 flow [2024-05-12 10:50:39,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5836, PETRI_PLACES=379, PETRI_TRANSITIONS=426} [2024-05-12 10:50:39,074 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 326 predicate places. [2024-05-12 10:50:39,074 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 426 transitions, 5836 flow [2024-05-12 10:50:39,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:39,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:50:39,075 INFO 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] [2024-05-12 10:50:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-05-12 10:50:39,075 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:50:39,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:50:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2036798915, now seen corresponding path program 5 times [2024-05-12 10:50:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:50:39,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795213078] [2024-05-12 10:50:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:50:39,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:50:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:50:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:50:39,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:50:39,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795213078] [2024-05-12 10:50:39,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795213078] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:50:39,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:50:39,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:50:39,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153064366] [2024-05-12 10:50:39,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:50:39,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:50:39,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:50:39,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:50:39,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:50:39,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:50:39,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 426 transitions, 5836 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:39,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:50:39,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:50:39,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:40,770 INFO L124 PetriNetUnfolderBase]: 4125/7233 cut-off events. [2024-05-12 10:50:40,770 INFO L125 PetriNetUnfolderBase]: For 529428/529448 co-relation queries the response was YES. [2024-05-12 10:50:40,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46343 conditions, 7233 events. 4125/7233 cut-off events. For 529428/529448 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 53974 event pairs, 1288 based on Foata normal form. 6/6957 useless extension candidates. Maximal degree in co-relation 46188. Up to 5977 conditions per place. [2024-05-12 10:50:40,872 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 291 selfloop transitions, 161 changer transitions 0/468 dead transitions. [2024-05-12 10:50:40,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 468 transitions, 7622 flow [2024-05-12 10:50:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:50:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:50:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 315 transitions. [2024-05-12 10:50:40,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-05-12 10:50:40,874 INFO L175 Difference]: Start difference. First operand has 379 places, 426 transitions, 5836 flow. Second operand 11 states and 315 transitions. [2024-05-12 10:50:40,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 468 transitions, 7622 flow [2024-05-12 10:50:44,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 468 transitions, 7264 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-05-12 10:50:44,473 INFO L231 Difference]: Finished difference. Result has 385 places, 432 transitions, 5970 flow [2024-05-12 10:50:44,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5542, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5970, PETRI_PLACES=385, PETRI_TRANSITIONS=432} [2024-05-12 10:50:44,474 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 332 predicate places. [2024-05-12 10:50:44,474 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 432 transitions, 5970 flow [2024-05-12 10:50:44,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:44,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:50:44,474 INFO 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] [2024-05-12 10:50:44,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-05-12 10:50:44,475 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:50:44,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:50:44,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2023466435, now seen corresponding path program 6 times [2024-05-12 10:50:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:50:44,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428144102] [2024-05-12 10:50:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:50:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:50:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:50:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:50:44,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:50:44,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428144102] [2024-05-12 10:50:44,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428144102] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:50:44,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:50:44,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:50:44,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952101361] [2024-05-12 10:50:44,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:50:44,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:50:44,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:50:44,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:50:44,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:50:44,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:50:44,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 432 transitions, 5970 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:44,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:50:44,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:50:44,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:46,250 INFO L124 PetriNetUnfolderBase]: 4122/7229 cut-off events. [2024-05-12 10:50:46,251 INFO L125 PetriNetUnfolderBase]: For 531404/531424 co-relation queries the response was YES. [2024-05-12 10:50:46,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46299 conditions, 7229 events. 4122/7229 cut-off events. For 531404/531424 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 53996 event pairs, 1288 based on Foata normal form. 6/6953 useless extension candidates. Maximal degree in co-relation 46143. Up to 5974 conditions per place. [2024-05-12 10:50:46,367 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 288 selfloop transitions, 164 changer transitions 0/468 dead transitions. [2024-05-12 10:50:46,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 468 transitions, 7386 flow [2024-05-12 10:50:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:50:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:50:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 334 transitions. [2024-05-12 10:50:46,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-05-12 10:50:46,369 INFO L175 Difference]: Start difference. First operand has 385 places, 432 transitions, 5970 flow. Second operand 12 states and 334 transitions. [2024-05-12 10:50:46,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 468 transitions, 7386 flow [2024-05-12 10:50:50,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 468 transitions, 7076 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-05-12 10:50:50,248 INFO L231 Difference]: Finished difference. Result has 391 places, 432 transitions, 5994 flow [2024-05-12 10:50:50,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5994, PETRI_PLACES=391, PETRI_TRANSITIONS=432} [2024-05-12 10:50:50,248 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 338 predicate places. [2024-05-12 10:50:50,248 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 432 transitions, 5994 flow [2024-05-12 10:50:50,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:50,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:50:50,249 INFO 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] [2024-05-12 10:50:50,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-05-12 10:50:50,249 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:50:50,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:50:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash 517221183, now seen corresponding path program 10 times [2024-05-12 10:50:50,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:50:50,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450383685] [2024-05-12 10:50:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:50:50,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:50:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:50:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:50:50,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:50:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450383685] [2024-05-12 10:50:50,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450383685] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:50:50,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:50:50,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:50:50,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449030091] [2024-05-12 10:50:50,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:50:50,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:50:50,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:50:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:50:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:50:50,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:50:50,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 432 transitions, 5994 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:50,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:50:50,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:50:50,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:52,098 INFO L124 PetriNetUnfolderBase]: 4149/7268 cut-off events. [2024-05-12 10:50:52,098 INFO L125 PetriNetUnfolderBase]: For 553051/553069 co-relation queries the response was YES. [2024-05-12 10:50:52,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46949 conditions, 7268 events. 4149/7268 cut-off events. For 553051/553069 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 54324 event pairs, 1291 based on Foata normal form. 7/6985 useless extension candidates. Maximal degree in co-relation 46792. Up to 5936 conditions per place. [2024-05-12 10:50:52,204 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 271 selfloop transitions, 184 changer transitions 0/471 dead transitions. [2024-05-12 10:50:52,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 471 transitions, 7810 flow [2024-05-12 10:50:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:50:52,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:50:52,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 309 transitions. [2024-05-12 10:50:52,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732838589981447 [2024-05-12 10:50:52,206 INFO L175 Difference]: Start difference. First operand has 391 places, 432 transitions, 5994 flow. Second operand 11 states and 309 transitions. [2024-05-12 10:50:52,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 471 transitions, 7810 flow [2024-05-12 10:50:57,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 471 transitions, 7482 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-05-12 10:50:57,040 INFO L231 Difference]: Finished difference. Result has 392 places, 441 transitions, 6232 flow [2024-05-12 10:50:57,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5666, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6232, PETRI_PLACES=392, PETRI_TRANSITIONS=441} [2024-05-12 10:50:57,040 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 339 predicate places. [2024-05-12 10:50:57,040 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 441 transitions, 6232 flow [2024-05-12 10:50:57,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:57,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:50:57,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:50:57,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-05-12 10:50:57,041 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:50:57,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:50:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash 523887423, now seen corresponding path program 11 times [2024-05-12 10:50:57,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:50:57,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591462675] [2024-05-12 10:50:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:50:57,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:50:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:50:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:50:57,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:50:57,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591462675] [2024-05-12 10:50:57,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591462675] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:50:57,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:50:57,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:50:57,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957009282] [2024-05-12 10:50:57,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:50:57,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:50:57,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:50:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:50:57,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:50:57,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:50:57,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 441 transitions, 6232 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:50:57,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:50:57,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:50:57,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:50:58,808 INFO L124 PetriNetUnfolderBase]: 4146/7264 cut-off events. [2024-05-12 10:50:58,808 INFO L125 PetriNetUnfolderBase]: For 556996/557014 co-relation queries the response was YES. [2024-05-12 10:50:58,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46984 conditions, 7264 events. 4146/7264 cut-off events. For 556996/557014 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 54238 event pairs, 1291 based on Foata normal form. 7/6981 useless extension candidates. Maximal degree in co-relation 46826. Up to 5933 conditions per place. [2024-05-12 10:50:58,912 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 269 selfloop transitions, 186 changer transitions 0/471 dead transitions. [2024-05-12 10:50:58,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 471 transitions, 7646 flow [2024-05-12 10:50:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:50:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:50:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 328 transitions. [2024-05-12 10:50:58,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-05-12 10:50:58,914 INFO L175 Difference]: Start difference. First operand has 392 places, 441 transitions, 6232 flow. Second operand 12 states and 328 transitions. [2024-05-12 10:50:58,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 471 transitions, 7646 flow [2024-05-12 10:51:04,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 471 transitions, 7341 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-05-12 10:51:04,062 INFO L231 Difference]: Finished difference. Result has 399 places, 441 transitions, 6305 flow [2024-05-12 10:51:04,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5927, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6305, PETRI_PLACES=399, PETRI_TRANSITIONS=441} [2024-05-12 10:51:04,063 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 346 predicate places. [2024-05-12 10:51:04,063 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 441 transitions, 6305 flow [2024-05-12 10:51:04,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:04,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:51:04,063 INFO 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] [2024-05-12 10:51:04,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-05-12 10:51:04,063 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:51:04,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:51:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash 530560607, now seen corresponding path program 7 times [2024-05-12 10:51:04,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:51:04,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170411436] [2024-05-12 10:51:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:51:04,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:51:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:51:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:51:04,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:51:04,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170411436] [2024-05-12 10:51:04,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170411436] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:51:04,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:51:04,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:51:04,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858964757] [2024-05-12 10:51:04,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:51:04,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:51:04,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:51:04,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:51:04,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:51:04,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:51:04,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 441 transitions, 6305 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:04,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:51:04,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:51:04,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:51:05,797 INFO L124 PetriNetUnfolderBase]: 4183/7322 cut-off events. [2024-05-12 10:51:05,797 INFO L125 PetriNetUnfolderBase]: For 586102/586122 co-relation queries the response was YES. [2024-05-12 10:51:05,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47844 conditions, 7322 events. 4183/7322 cut-off events. For 586102/586122 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54819 event pairs, 1288 based on Foata normal form. 6/7032 useless extension candidates. Maximal degree in co-relation 47685. Up to 6046 conditions per place. [2024-05-12 10:51:05,911 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 298 selfloop transitions, 171 changer transitions 0/485 dead transitions. [2024-05-12 10:51:05,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 485 transitions, 8418 flow [2024-05-12 10:51:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:51:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:51:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 332 transitions. [2024-05-12 10:51:05,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-05-12 10:51:05,912 INFO L175 Difference]: Start difference. First operand has 399 places, 441 transitions, 6305 flow. Second operand 12 states and 332 transitions. [2024-05-12 10:51:05,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 485 transitions, 8418 flow [2024-05-12 10:51:10,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 485 transitions, 8044 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-05-12 10:51:10,072 INFO L231 Difference]: Finished difference. Result has 401 places, 453 transitions, 6506 flow [2024-05-12 10:51:10,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6506, PETRI_PLACES=401, PETRI_TRANSITIONS=453} [2024-05-12 10:51:10,072 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 348 predicate places. [2024-05-12 10:51:10,072 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 453 transitions, 6506 flow [2024-05-12 10:51:10,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:10,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:51:10,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:51:10,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-05-12 10:51:10,073 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:51:10,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:51:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash -312303043, now seen corresponding path program 8 times [2024-05-12 10:51:10,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:51:10,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842212529] [2024-05-12 10:51:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:51:10,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:51:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:51:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:51:10,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:51:10,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842212529] [2024-05-12 10:51:10,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842212529] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:51:10,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:51:10,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:51:10,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993681853] [2024-05-12 10:51:10,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:51:10,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:51:10,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:51:10,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:51:10,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:51:10,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:51:10,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 453 transitions, 6506 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:10,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:51:10,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:51:10,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:51:11,861 INFO L124 PetriNetUnfolderBase]: 4180/7318 cut-off events. [2024-05-12 10:51:11,862 INFO L125 PetriNetUnfolderBase]: For 588891/588911 co-relation queries the response was YES. [2024-05-12 10:51:11,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47723 conditions, 7318 events. 4180/7318 cut-off events. For 588891/588911 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 54631 event pairs, 1288 based on Foata normal form. 6/7028 useless extension candidates. Maximal degree in co-relation 47563. Up to 6043 conditions per place. [2024-05-12 10:51:11,967 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 298 selfloop transitions, 169 changer transitions 0/483 dead transitions. [2024-05-12 10:51:11,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 483 transitions, 8172 flow [2024-05-12 10:51:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:51:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:51:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 309 transitions. [2024-05-12 10:51:11,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732838589981447 [2024-05-12 10:51:11,969 INFO L175 Difference]: Start difference. First operand has 401 places, 453 transitions, 6506 flow. Second operand 11 states and 309 transitions. [2024-05-12 10:51:11,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 483 transitions, 8172 flow [2024-05-12 10:51:16,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 483 transitions, 7882 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-05-12 10:51:16,264 INFO L231 Difference]: Finished difference. Result has 406 places, 453 transitions, 6560 flow [2024-05-12 10:51:16,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6216, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6560, PETRI_PLACES=406, PETRI_TRANSITIONS=453} [2024-05-12 10:51:16,264 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 353 predicate places. [2024-05-12 10:51:16,265 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 453 transitions, 6560 flow [2024-05-12 10:51:16,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:16,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:51:16,265 INFO 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] [2024-05-12 10:51:16,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-05-12 10:51:16,265 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:51:16,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:51:16,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2019947843, now seen corresponding path program 9 times [2024-05-12 10:51:16,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:51:16,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790450134] [2024-05-12 10:51:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:51:16,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:51:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:51:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:51:16,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:51:16,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790450134] [2024-05-12 10:51:16,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790450134] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:51:16,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:51:16,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:51:16,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813012162] [2024-05-12 10:51:16,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:51:16,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:51:16,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:51:16,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:51:16,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:51:16,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:51:16,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 453 transitions, 6560 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:16,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:51:16,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:51:16,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:51:18,222 INFO L124 PetriNetUnfolderBase]: 4177/7314 cut-off events. [2024-05-12 10:51:18,222 INFO L125 PetriNetUnfolderBase]: For 592983/593003 co-relation queries the response was YES. [2024-05-12 10:51:18,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47661 conditions, 7314 events. 4177/7314 cut-off events. For 592983/593003 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 54628 event pairs, 1288 based on Foata normal form. 6/7024 useless extension candidates. Maximal degree in co-relation 47500. Up to 6040 conditions per place. [2024-05-12 10:51:18,318 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 289 selfloop transitions, 178 changer transitions 0/483 dead transitions. [2024-05-12 10:51:18,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 483 transitions, 8010 flow [2024-05-12 10:51:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:51:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:51:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 328 transitions. [2024-05-12 10:51:18,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-05-12 10:51:18,319 INFO L175 Difference]: Start difference. First operand has 406 places, 453 transitions, 6560 flow. Second operand 12 states and 328 transitions. [2024-05-12 10:51:18,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 483 transitions, 8010 flow [2024-05-12 10:51:24,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 483 transitions, 7728 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-05-12 10:51:24,027 INFO L231 Difference]: Finished difference. Result has 412 places, 453 transitions, 6640 flow [2024-05-12 10:51:24,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6278, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6640, PETRI_PLACES=412, PETRI_TRANSITIONS=453} [2024-05-12 10:51:24,028 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 359 predicate places. [2024-05-12 10:51:24,028 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 453 transitions, 6640 flow [2024-05-12 10:51:24,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:24,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:51:24,028 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, 1] [2024-05-12 10:51:24,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-05-12 10:51:24,028 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:51:24,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:51:24,029 INFO L85 PathProgramCache]: Analyzing trace with hash 613390973, now seen corresponding path program 1 times [2024-05-12 10:51:24,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:51:24,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841418769] [2024-05-12 10:51:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:51:24,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:51:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:51:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:51:24,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:51:24,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841418769] [2024-05-12 10:51:24,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841418769] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:51:24,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:51:24,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:51:24,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511517318] [2024-05-12 10:51:24,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:51:24,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:51:24,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:51:24,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:51:24,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:51:24,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:51:24,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 453 transitions, 6640 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:24,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:51:24,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:51:24,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:51:25,897 INFO L124 PetriNetUnfolderBase]: 4224/7423 cut-off events. [2024-05-12 10:51:25,898 INFO L125 PetriNetUnfolderBase]: For 624915/624936 co-relation queries the response was YES. [2024-05-12 10:51:26,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48675 conditions, 7423 events. 4224/7423 cut-off events. For 624915/624936 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 55567 event pairs, 1262 based on Foata normal form. 11/7135 useless extension candidates. Maximal degree in co-relation 48513. Up to 6261 conditions per place. [2024-05-12 10:51:26,038 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 442 selfloop transitions, 34 changer transitions 0/492 dead transitions. [2024-05-12 10:51:26,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 492 transitions, 8000 flow [2024-05-12 10:51:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:51:26,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:51:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-05-12 10:51:26,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5827664399092971 [2024-05-12 10:51:26,039 INFO L175 Difference]: Start difference. First operand has 412 places, 453 transitions, 6640 flow. Second operand 9 states and 257 transitions. [2024-05-12 10:51:26,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 492 transitions, 8000 flow [2024-05-12 10:51:31,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 492 transitions, 7633 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-05-12 10:51:31,352 INFO L231 Difference]: Finished difference. Result has 410 places, 457 transitions, 6442 flow [2024-05-12 10:51:31,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6273, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6442, PETRI_PLACES=410, PETRI_TRANSITIONS=457} [2024-05-12 10:51:31,353 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 357 predicate places. [2024-05-12 10:51:31,353 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 457 transitions, 6442 flow [2024-05-12 10:51:31,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:31,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:51:31,360 INFO 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] [2024-05-12 10:51:31,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-05-12 10:51:31,360 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:51:31,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:51:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 616247933, now seen corresponding path program 2 times [2024-05-12 10:51:31,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:51:31,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712747535] [2024-05-12 10:51:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:51:31,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:51:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:51:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:51:31,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:51:31,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712747535] [2024-05-12 10:51:31,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712747535] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:51:31,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:51:31,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:51:31,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174671346] [2024-05-12 10:51:31,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:51:31,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:51:31,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:51:31,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:51:31,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:51:31,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:51:31,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 457 transitions, 6442 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:31,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:51:31,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:51:31,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:51:33,247 INFO L124 PetriNetUnfolderBase]: 4219/7381 cut-off events. [2024-05-12 10:51:33,248 INFO L125 PetriNetUnfolderBase]: For 621833/621854 co-relation queries the response was YES. [2024-05-12 10:51:33,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48355 conditions, 7381 events. 4219/7381 cut-off events. For 621833/621854 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 55298 event pairs, 1287 based on Foata normal form. 11/7092 useless extension candidates. Maximal degree in co-relation 48192. Up to 6304 conditions per place. [2024-05-12 10:51:33,364 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 438 selfloop transitions, 30 changer transitions 0/484 dead transitions. [2024-05-12 10:51:33,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 484 transitions, 7448 flow [2024-05-12 10:51:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:51:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:51:33,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-05-12 10:51:33,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790816326530612 [2024-05-12 10:51:33,365 INFO L175 Difference]: Start difference. First operand has 410 places, 457 transitions, 6442 flow. Second operand 8 states and 227 transitions. [2024-05-12 10:51:33,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 484 transitions, 7448 flow [2024-05-12 10:51:37,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 484 transitions, 7332 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-05-12 10:51:37,677 INFO L231 Difference]: Finished difference. Result has 413 places, 457 transitions, 6391 flow [2024-05-12 10:51:37,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6326, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6391, PETRI_PLACES=413, PETRI_TRANSITIONS=457} [2024-05-12 10:51:37,677 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 360 predicate places. [2024-05-12 10:51:37,677 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 457 transitions, 6391 flow [2024-05-12 10:51:37,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:37,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:51:37,678 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, 1] [2024-05-12 10:51:37,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-05-12 10:51:37,678 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:51:37,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:51:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash 897178237, now seen corresponding path program 3 times [2024-05-12 10:51:37,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:51:37,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715158565] [2024-05-12 10:51:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:51:37,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:51:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:51:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:51:38,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:51:38,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715158565] [2024-05-12 10:51:38,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715158565] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:51:38,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:51:38,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:51:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539675170] [2024-05-12 10:51:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:51:38,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:51:38,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:51:38,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:51:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:51:38,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:51:38,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 457 transitions, 6391 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:38,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:51:38,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:51:38,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:51:39,473 INFO L124 PetriNetUnfolderBase]: 4240/7420 cut-off events. [2024-05-12 10:51:39,473 INFO L125 PetriNetUnfolderBase]: For 631600/631618 co-relation queries the response was YES. [2024-05-12 10:51:39,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48459 conditions, 7420 events. 4240/7420 cut-off events. For 631600/631618 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 55572 event pairs, 1295 based on Foata normal form. 8/7124 useless extension candidates. Maximal degree in co-relation 48294. Up to 6260 conditions per place. [2024-05-12 10:51:39,579 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 378 selfloop transitions, 89 changer transitions 0/483 dead transitions. [2024-05-12 10:51:39,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 483 transitions, 7437 flow [2024-05-12 10:51:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:51:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:51:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-05-12 10:51:39,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841836734693877 [2024-05-12 10:51:39,581 INFO L175 Difference]: Start difference. First operand has 413 places, 457 transitions, 6391 flow. Second operand 8 states and 229 transitions. [2024-05-12 10:51:39,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 483 transitions, 7437 flow [2024-05-12 10:51:44,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 483 transitions, 7378 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 10:51:44,950 INFO L231 Difference]: Finished difference. Result has 415 places, 459 transitions, 6569 flow [2024-05-12 10:51:44,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6332, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6569, PETRI_PLACES=415, PETRI_TRANSITIONS=459} [2024-05-12 10:51:44,951 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 362 predicate places. [2024-05-12 10:51:44,951 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 459 transitions, 6569 flow [2024-05-12 10:51:44,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:44,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:51:44,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:51:44,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-05-12 10:51:44,952 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:51:44,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:51:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash -548516993, now seen corresponding path program 1 times [2024-05-12 10:51:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:51:44,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91980614] [2024-05-12 10:51:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:51:44,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:51:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:51:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:51:45,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:51:45,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91980614] [2024-05-12 10:51:45,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91980614] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:51:45,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:51:45,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:51:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725677901] [2024-05-12 10:51:45,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:51:45,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:51:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:51:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:51:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:51:45,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:51:45,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 459 transitions, 6569 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:45,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:51:45,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:51:45,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:51:46,834 INFO L124 PetriNetUnfolderBase]: 4247/7428 cut-off events. [2024-05-12 10:51:46,834 INFO L125 PetriNetUnfolderBase]: For 638055/638076 co-relation queries the response was YES. [2024-05-12 10:51:46,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49021 conditions, 7428 events. 4247/7428 cut-off events. For 638055/638076 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 55579 event pairs, 1288 based on Foata normal form. 10/7134 useless extension candidates. Maximal degree in co-relation 48855. Up to 6355 conditions per place. [2024-05-12 10:51:47,130 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 439 selfloop transitions, 31 changer transitions 0/486 dead transitions. [2024-05-12 10:51:47,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 486 transitions, 7645 flow [2024-05-12 10:51:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:51:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:51:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 10:51:47,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5739795918367347 [2024-05-12 10:51:47,131 INFO L175 Difference]: Start difference. First operand has 415 places, 459 transitions, 6569 flow. Second operand 8 states and 225 transitions. [2024-05-12 10:51:47,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 486 transitions, 7645 flow [2024-05-12 10:51:52,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 486 transitions, 7424 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-05-12 10:51:52,153 INFO L231 Difference]: Finished difference. Result has 417 places, 462 transitions, 6498 flow [2024-05-12 10:51:52,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6348, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6498, PETRI_PLACES=417, PETRI_TRANSITIONS=462} [2024-05-12 10:51:52,153 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 364 predicate places. [2024-05-12 10:51:52,153 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 462 transitions, 6498 flow [2024-05-12 10:51:52,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:52,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:51:52,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:51:52,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-05-12 10:51:52,154 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:51:52,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:51:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2030125731, now seen corresponding path program 2 times [2024-05-12 10:51:52,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:51:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099202464] [2024-05-12 10:51:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:51:52,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:51:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:51:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:51:52,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:51:52,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099202464] [2024-05-12 10:51:52,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099202464] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:51:52,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:51:52,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:51:52,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755062957] [2024-05-12 10:51:52,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:51:52,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:51:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:51:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:51:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:51:52,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:51:52,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 462 transitions, 6498 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:52,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:51:52,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:51:52,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:51:54,014 INFO L124 PetriNetUnfolderBase]: 4274/7475 cut-off events. [2024-05-12 10:51:54,014 INFO L125 PetriNetUnfolderBase]: For 662498/662524 co-relation queries the response was YES. [2024-05-12 10:51:54,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49579 conditions, 7475 events. 4274/7475 cut-off events. For 662498/662524 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 56044 event pairs, 1301 based on Foata normal form. 12/7179 useless extension candidates. Maximal degree in co-relation 49412. Up to 6184 conditions per place. [2024-05-12 10:51:54,147 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 354 selfloop transitions, 128 changer transitions 0/498 dead transitions. [2024-05-12 10:51:54,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 498 transitions, 8544 flow [2024-05-12 10:51:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:51:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:51:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-05-12 10:51:54,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5994897959183674 [2024-05-12 10:51:54,148 INFO L175 Difference]: Start difference. First operand has 417 places, 462 transitions, 6498 flow. Second operand 8 states and 235 transitions. [2024-05-12 10:51:54,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 498 transitions, 8544 flow [2024-05-12 10:51:58,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 498 transitions, 8424 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-05-12 10:51:58,604 INFO L231 Difference]: Finished difference. Result has 419 places, 474 transitions, 6974 flow [2024-05-12 10:51:58,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6378, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6974, PETRI_PLACES=419, PETRI_TRANSITIONS=474} [2024-05-12 10:51:58,604 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 366 predicate places. [2024-05-12 10:51:58,605 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 474 transitions, 6974 flow [2024-05-12 10:51:58,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:58,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:51:58,605 INFO 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] [2024-05-12 10:51:58,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-05-12 10:51:58,605 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:51:58,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:51:58,606 INFO L85 PathProgramCache]: Analyzing trace with hash 903849437, now seen corresponding path program 3 times [2024-05-12 10:51:58,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:51:58,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452610191] [2024-05-12 10:51:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:51:58,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:51:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:51:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:51:58,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:51:58,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452610191] [2024-05-12 10:51:58,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452610191] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:51:58,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:51:58,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:51:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676482168] [2024-05-12 10:51:58,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:51:58,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:51:58,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:51:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:51:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:51:59,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:51:59,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 474 transitions, 6974 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:51:59,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:51:59,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:51:59,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:52:00,411 INFO L124 PetriNetUnfolderBase]: 4271/7471 cut-off events. [2024-05-12 10:52:00,411 INFO L125 PetriNetUnfolderBase]: For 668148/668174 co-relation queries the response was YES. [2024-05-12 10:52:00,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49795 conditions, 7471 events. 4271/7471 cut-off events. For 668148/668174 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 55954 event pairs, 1301 based on Foata normal form. 12/7175 useless extension candidates. Maximal degree in co-relation 49627. Up to 6181 conditions per place. [2024-05-12 10:52:00,536 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 352 selfloop transitions, 129 changer transitions 0/497 dead transitions. [2024-05-12 10:52:00,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 497 transitions, 8460 flow [2024-05-12 10:52:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:52:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:52:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-05-12 10:52:00,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943877551020408 [2024-05-12 10:52:00,538 INFO L175 Difference]: Start difference. First operand has 419 places, 474 transitions, 6974 flow. Second operand 8 states and 233 transitions. [2024-05-12 10:52:00,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 497 transitions, 8460 flow [2024-05-12 10:52:05,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 497 transitions, 8271 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-05-12 10:52:05,037 INFO L231 Difference]: Finished difference. Result has 425 places, 474 transitions, 7049 flow [2024-05-12 10:52:05,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6785, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7049, PETRI_PLACES=425, PETRI_TRANSITIONS=474} [2024-05-12 10:52:05,038 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 372 predicate places. [2024-05-12 10:52:05,038 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 474 transitions, 7049 flow [2024-05-12 10:52:05,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:05,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:52:05,038 INFO 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] [2024-05-12 10:52:05,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-05-12 10:52:05,039 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:52:05,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:52:05,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2023450563, now seen corresponding path program 1 times [2024-05-12 10:52:05,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:52:05,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775033542] [2024-05-12 10:52:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:52:05,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:52:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:52:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:52:05,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:52:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775033542] [2024-05-12 10:52:05,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775033542] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:52:05,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:52:05,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:52:05,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065632921] [2024-05-12 10:52:05,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:52:05,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:52:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:52:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:52:05,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:52:05,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:52:05,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 474 transitions, 7049 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:05,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:52:05,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:52:05,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:52:06,916 INFO L124 PetriNetUnfolderBase]: 4292/7506 cut-off events. [2024-05-12 10:52:06,916 INFO L125 PetriNetUnfolderBase]: For 686540/686560 co-relation queries the response was YES. [2024-05-12 10:52:07,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50385 conditions, 7506 events. 4292/7506 cut-off events. For 686540/686560 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 56133 event pairs, 1293 based on Foata normal form. 7/7201 useless extension candidates. Maximal degree in co-relation 50215. Up to 6355 conditions per place. [2024-05-12 10:52:07,040 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 393 selfloop transitions, 91 changer transitions 0/500 dead transitions. [2024-05-12 10:52:07,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 500 transitions, 8137 flow [2024-05-12 10:52:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:52:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:52:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-05-12 10:52:07,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-05-12 10:52:07,041 INFO L175 Difference]: Start difference. First operand has 425 places, 474 transitions, 7049 flow. Second operand 8 states and 228 transitions. [2024-05-12 10:52:07,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 500 transitions, 8137 flow [2024-05-12 10:52:12,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 500 transitions, 7867 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 10:52:12,650 INFO L231 Difference]: Finished difference. Result has 426 places, 476 transitions, 7028 flow [2024-05-12 10:52:12,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6779, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7028, PETRI_PLACES=426, PETRI_TRANSITIONS=476} [2024-05-12 10:52:12,651 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 373 predicate places. [2024-05-12 10:52:12,651 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 476 transitions, 7028 flow [2024-05-12 10:52:12,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:12,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:52:12,651 INFO 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] [2024-05-12 10:52:12,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-05-12 10:52:12,652 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:52:12,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:52:12,652 INFO L85 PathProgramCache]: Analyzing trace with hash -305634819, now seen corresponding path program 4 times [2024-05-12 10:52:12,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:52:12,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076903247] [2024-05-12 10:52:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:52:12,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:52:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:52:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:52:13,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:52:13,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076903247] [2024-05-12 10:52:13,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076903247] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:52:13,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:52:13,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:52:13,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952066032] [2024-05-12 10:52:13,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:52:13,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:52:13,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:52:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:52:13,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:52:13,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:52:13,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 476 transitions, 7028 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:13,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:52:13,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:52:13,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:52:14,849 INFO L124 PetriNetUnfolderBase]: 4313/7545 cut-off events. [2024-05-12 10:52:14,849 INFO L125 PetriNetUnfolderBase]: For 699862/699880 co-relation queries the response was YES. [2024-05-12 10:52:14,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50916 conditions, 7545 events. 4313/7545 cut-off events. For 699862/699880 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 56658 event pairs, 1305 based on Foata normal form. 8/7237 useless extension candidates. Maximal degree in co-relation 50745. Up to 6362 conditions per place. [2024-05-12 10:52:14,949 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 392 selfloop transitions, 91 changer transitions 0/499 dead transitions. [2024-05-12 10:52:14,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 499 transitions, 8108 flow [2024-05-12 10:52:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:52:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:52:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 10:52:14,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5739795918367347 [2024-05-12 10:52:14,951 INFO L175 Difference]: Start difference. First operand has 426 places, 476 transitions, 7028 flow. Second operand 8 states and 225 transitions. [2024-05-12 10:52:14,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 499 transitions, 8108 flow [2024-05-12 10:52:20,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 499 transitions, 7875 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-05-12 10:52:20,457 INFO L231 Difference]: Finished difference. Result has 428 places, 478 transitions, 7046 flow [2024-05-12 10:52:20,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6795, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7046, PETRI_PLACES=428, PETRI_TRANSITIONS=478} [2024-05-12 10:52:20,457 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 375 predicate places. [2024-05-12 10:52:20,457 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 478 transitions, 7046 flow [2024-05-12 10:52:20,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:20,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:52:20,458 INFO 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] [2024-05-12 10:52:20,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-05-12 10:52:20,458 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:52:20,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:52:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash -298963619, now seen corresponding path program 4 times [2024-05-12 10:52:20,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:52:20,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100744826] [2024-05-12 10:52:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:52:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:52:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:52:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:52:20,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:52:20,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100744826] [2024-05-12 10:52:20,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100744826] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:52:20,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:52:20,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:52:20,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431959852] [2024-05-12 10:52:20,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:52:20,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:52:20,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:52:20,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:52:20,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:52:20,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:52:20,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 478 transitions, 7046 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:20,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:52:20,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:52:20,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:52:22,319 INFO L124 PetriNetUnfolderBase]: 4350/7604 cut-off events. [2024-05-12 10:52:22,320 INFO L125 PetriNetUnfolderBase]: For 728039/728065 co-relation queries the response was YES. [2024-05-12 10:52:22,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51957 conditions, 7604 events. 4350/7604 cut-off events. For 728039/728065 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 57017 event pairs, 1312 based on Foata normal form. 12/7296 useless extension candidates. Maximal degree in co-relation 51785. Up to 6284 conditions per place. [2024-05-12 10:52:22,440 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 356 selfloop transitions, 140 changer transitions 0/512 dead transitions. [2024-05-12 10:52:22,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 512 transitions, 9364 flow [2024-05-12 10:52:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:52:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:52:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-05-12 10:52:22,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943877551020408 [2024-05-12 10:52:22,441 INFO L175 Difference]: Start difference. First operand has 428 places, 478 transitions, 7046 flow. Second operand 8 states and 233 transitions. [2024-05-12 10:52:22,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 512 transitions, 9364 flow [2024-05-12 10:52:27,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 512 transitions, 9129 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-05-12 10:52:27,398 INFO L231 Difference]: Finished difference. Result has 430 places, 490 transitions, 7411 flow [2024-05-12 10:52:27,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6811, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7411, PETRI_PLACES=430, PETRI_TRANSITIONS=490} [2024-05-12 10:52:27,399 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 377 predicate places. [2024-05-12 10:52:27,399 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 490 transitions, 7411 flow [2024-05-12 10:52:27,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:27,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:52:27,399 INFO 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] [2024-05-12 10:52:27,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-05-12 10:52:27,400 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:52:27,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:52:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash -305629859, now seen corresponding path program 5 times [2024-05-12 10:52:27,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:52:27,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145736365] [2024-05-12 10:52:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:52:27,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:52:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:52:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:52:27,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:52:27,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145736365] [2024-05-12 10:52:27,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145736365] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:52:27,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:52:27,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:52:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944495590] [2024-05-12 10:52:27,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:52:27,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:52:27,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:52:27,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:52:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:52:27,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:52:27,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 490 transitions, 7411 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:27,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:52:27,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:52:27,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:52:29,353 INFO L124 PetriNetUnfolderBase]: 4347/7600 cut-off events. [2024-05-12 10:52:29,354 INFO L125 PetriNetUnfolderBase]: For 730272/730298 co-relation queries the response was YES. [2024-05-12 10:52:29,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51749 conditions, 7600 events. 4347/7600 cut-off events. For 730272/730298 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 57014 event pairs, 1312 based on Foata normal form. 12/7292 useless extension candidates. Maximal degree in co-relation 51576. Up to 6281 conditions per place. [2024-05-12 10:52:29,476 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 354 selfloop transitions, 141 changer transitions 0/511 dead transitions. [2024-05-12 10:52:29,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 511 transitions, 9177 flow [2024-05-12 10:52:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:52:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:52:29,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-05-12 10:52:29,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-05-12 10:52:29,478 INFO L175 Difference]: Start difference. First operand has 430 places, 490 transitions, 7411 flow. Second operand 8 states and 231 transitions. [2024-05-12 10:52:29,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 511 transitions, 9177 flow [2024-05-12 10:52:34,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 511 transitions, 8911 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-05-12 10:52:34,432 INFO L231 Difference]: Finished difference. Result has 436 places, 490 transitions, 7433 flow [2024-05-12 10:52:34,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7145, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7433, PETRI_PLACES=436, PETRI_TRANSITIONS=490} [2024-05-12 10:52:34,432 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 383 predicate places. [2024-05-12 10:52:34,432 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 490 transitions, 7433 flow [2024-05-12 10:52:34,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:34,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:52:34,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:52:34,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-05-12 10:52:34,433 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:52:34,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:52:34,441 INFO L85 PathProgramCache]: Analyzing trace with hash -652282531, now seen corresponding path program 6 times [2024-05-12 10:52:34,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:52:34,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791356107] [2024-05-12 10:52:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:52:34,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:52:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:52:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:52:34,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:52:34,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791356107] [2024-05-12 10:52:34,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791356107] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:52:34,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:52:34,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:52:34,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592471348] [2024-05-12 10:52:34,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:52:34,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:52:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:52:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:52:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:52:34,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:52:34,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 490 transitions, 7433 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:34,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:52:34,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:52:34,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:52:36,308 INFO L124 PetriNetUnfolderBase]: 4344/7596 cut-off events. [2024-05-12 10:52:36,308 INFO L125 PetriNetUnfolderBase]: For 733888/733914 co-relation queries the response was YES. [2024-05-12 10:52:36,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51582 conditions, 7596 events. 4344/7596 cut-off events. For 733888/733914 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 56994 event pairs, 1312 based on Foata normal form. 12/7288 useless extension candidates. Maximal degree in co-relation 51408. Up to 6278 conditions per place. [2024-05-12 10:52:36,445 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 347 selfloop transitions, 147 changer transitions 0/510 dead transitions. [2024-05-12 10:52:36,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 510 transitions, 8957 flow [2024-05-12 10:52:36,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:52:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:52:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-05-12 10:52:36,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841836734693877 [2024-05-12 10:52:36,447 INFO L175 Difference]: Start difference. First operand has 436 places, 490 transitions, 7433 flow. Second operand 8 states and 229 transitions. [2024-05-12 10:52:36,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 510 transitions, 8957 flow [2024-05-12 10:52:42,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 510 transitions, 8633 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-05-12 10:52:42,165 INFO L231 Difference]: Finished difference. Result has 438 places, 490 transitions, 7409 flow [2024-05-12 10:52:42,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7109, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7409, PETRI_PLACES=438, PETRI_TRANSITIONS=490} [2024-05-12 10:52:42,166 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 385 predicate places. [2024-05-12 10:52:42,166 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 490 transitions, 7409 flow [2024-05-12 10:52:42,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:42,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:52:42,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:52:42,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-05-12 10:52:42,166 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:52:42,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:52:42,167 INFO L85 PathProgramCache]: Analyzing trace with hash -298954691, now seen corresponding path program 2 times [2024-05-12 10:52:42,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:52:42,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260654242] [2024-05-12 10:52:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:52:42,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:52:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:52:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:52:42,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:52:42,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260654242] [2024-05-12 10:52:42,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260654242] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:52:42,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:52:42,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:52:42,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160728898] [2024-05-12 10:52:42,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:52:42,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:52:42,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:52:42,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:52:42,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:52:42,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:52:42,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 490 transitions, 7409 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:42,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:52:42,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:52:42,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:52:44,104 INFO L124 PetriNetUnfolderBase]: 4365/7631 cut-off events. [2024-05-12 10:52:44,104 INFO L125 PetriNetUnfolderBase]: For 753652/753672 co-relation queries the response was YES. [2024-05-12 10:52:44,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51995 conditions, 7631 events. 4365/7631 cut-off events. For 753652/753672 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 57288 event pairs, 1304 based on Foata normal form. 7/7314 useless extension candidates. Maximal degree in co-relation 51820. Up to 6457 conditions per place. [2024-05-12 10:52:44,222 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 408 selfloop transitions, 89 changer transitions 0/513 dead transitions. [2024-05-12 10:52:44,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 513 transitions, 8521 flow [2024-05-12 10:52:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:52:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:52:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 10:52:44,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576530612244898 [2024-05-12 10:52:44,224 INFO L175 Difference]: Start difference. First operand has 438 places, 490 transitions, 7409 flow. Second operand 8 states and 226 transitions. [2024-05-12 10:52:44,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 513 transitions, 8521 flow [2024-05-12 10:52:49,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 513 transitions, 8224 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-05-12 10:52:49,718 INFO L231 Difference]: Finished difference. Result has 439 places, 492 transitions, 7363 flow [2024-05-12 10:52:49,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7112, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7363, PETRI_PLACES=439, PETRI_TRANSITIONS=492} [2024-05-12 10:52:49,719 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 386 predicate places. [2024-05-12 10:52:49,719 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 492 transitions, 7363 flow [2024-05-12 10:52:49,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:49,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:52:49,719 INFO 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] [2024-05-12 10:52:49,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-05-12 10:52:49,719 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:52:49,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:52:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash -652273603, now seen corresponding path program 3 times [2024-05-12 10:52:49,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:52:49,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593770508] [2024-05-12 10:52:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:52:49,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:52:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:52:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:52:50,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:52:50,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593770508] [2024-05-12 10:52:50,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593770508] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:52:50,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:52:50,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:52:50,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957466255] [2024-05-12 10:52:50,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:52:50,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:52:50,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:52:50,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:52:50,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:52:50,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:52:50,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 492 transitions, 7363 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:50,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:52:50,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:52:50,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:52:51,815 INFO L124 PetriNetUnfolderBase]: 4386/7672 cut-off events. [2024-05-12 10:52:51,815 INFO L125 PetriNetUnfolderBase]: For 767828/767848 co-relation queries the response was YES. [2024-05-12 10:52:51,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52511 conditions, 7672 events. 4386/7672 cut-off events. For 767828/767848 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 57668 event pairs, 1313 based on Foata normal form. 7/7353 useless extension candidates. Maximal degree in co-relation 52335. Up to 6488 conditions per place. [2024-05-12 10:52:51,926 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 408 selfloop transitions, 91 changer transitions 0/515 dead transitions. [2024-05-12 10:52:51,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 515 transitions, 8483 flow [2024-05-12 10:52:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:52:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:52:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 10:52:51,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5739795918367347 [2024-05-12 10:52:51,927 INFO L175 Difference]: Start difference. First operand has 439 places, 492 transitions, 7363 flow. Second operand 8 states and 225 transitions. [2024-05-12 10:52:51,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 515 transitions, 8483 flow [2024-05-12 10:52:56,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 515 transitions, 8266 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-05-12 10:52:56,242 INFO L231 Difference]: Finished difference. Result has 442 places, 494 transitions, 7405 flow [2024-05-12 10:52:56,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7146, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7405, PETRI_PLACES=442, PETRI_TRANSITIONS=494} [2024-05-12 10:52:56,243 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 389 predicate places. [2024-05-12 10:52:56,243 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 494 transitions, 7405 flow [2024-05-12 10:52:56,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:56,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:52:56,243 INFO 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] [2024-05-12 10:52:56,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-05-12 10:52:56,243 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:52:56,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:52:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash -641798083, now seen corresponding path program 4 times [2024-05-12 10:52:56,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:52:56,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346419352] [2024-05-12 10:52:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:52:56,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:52:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:52:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:52:56,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:52:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346419352] [2024-05-12 10:52:56,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346419352] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:52:56,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:52:56,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:52:56,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665642893] [2024-05-12 10:52:56,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:52:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:52:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:52:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:52:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:52:56,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:52:56,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 494 transitions, 7405 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:52:56,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:52:56,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:52:56,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:52:58,171 INFO L124 PetriNetUnfolderBase]: 4433/7755 cut-off events. [2024-05-12 10:52:58,172 INFO L125 PetriNetUnfolderBase]: For 800661/800681 co-relation queries the response was YES. [2024-05-12 10:52:58,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53691 conditions, 7755 events. 4433/7755 cut-off events. For 800661/800681 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 58322 event pairs, 1309 based on Foata normal form. 7/7434 useless extension candidates. Maximal degree in co-relation 53514. Up to 6477 conditions per place. [2024-05-12 10:52:58,308 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 409 selfloop transitions, 99 changer transitions 0/524 dead transitions. [2024-05-12 10:52:58,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 524 transitions, 8894 flow [2024-05-12 10:52:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:52:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:52:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-05-12 10:52:58,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841836734693877 [2024-05-12 10:52:58,310 INFO L175 Difference]: Start difference. First operand has 442 places, 494 transitions, 7405 flow. Second operand 8 states and 229 transitions. [2024-05-12 10:52:58,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 524 transitions, 8894 flow [2024-05-12 10:53:04,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 524 transitions, 8651 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-05-12 10:53:05,005 INFO L231 Difference]: Finished difference. Result has 445 places, 499 transitions, 7542 flow [2024-05-12 10:53:05,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7162, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7542, PETRI_PLACES=445, PETRI_TRANSITIONS=499} [2024-05-12 10:53:05,005 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 392 predicate places. [2024-05-12 10:53:05,005 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 499 transitions, 7542 flow [2024-05-12 10:53:05,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:05,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:05,006 INFO 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] [2024-05-12 10:53:05,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-05-12 10:53:05,006 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:05,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1165112975, now seen corresponding path program 11 times [2024-05-12 10:53:05,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:05,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487244331] [2024-05-12 10:53:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:05,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:05,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:05,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487244331] [2024-05-12 10:53:05,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487244331] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:05,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:05,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:53:05,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426333401] [2024-05-12 10:53:05,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:05,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:53:05,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:05,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:53:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:53:05,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:53:05,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 499 transitions, 7542 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:05,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:05,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:53:05,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:07,074 INFO L124 PetriNetUnfolderBase]: 4454/7811 cut-off events. [2024-05-12 10:53:07,075 INFO L125 PetriNetUnfolderBase]: For 816506/816518 co-relation queries the response was YES. [2024-05-12 10:53:07,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54340 conditions, 7811 events. 4454/7811 cut-off events. For 816506/816518 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 58972 event pairs, 1300 based on Foata normal form. 2/7475 useless extension candidates. Maximal degree in co-relation 54161. Up to 6544 conditions per place. [2024-05-12 10:53:07,204 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 448 selfloop transitions, 75 changer transitions 0/539 dead transitions. [2024-05-12 10:53:07,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 539 transitions, 9090 flow [2024-05-12 10:53:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:53:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:53:07,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-05-12 10:53:07,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5895691609977324 [2024-05-12 10:53:07,206 INFO L175 Difference]: Start difference. First operand has 445 places, 499 transitions, 7542 flow. Second operand 9 states and 260 transitions. [2024-05-12 10:53:07,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 539 transitions, 9090 flow [2024-05-12 10:53:13,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 539 transitions, 8880 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-05-12 10:53:13,018 INFO L231 Difference]: Finished difference. Result has 451 places, 504 transitions, 7659 flow [2024-05-12 10:53:13,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7332, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7659, PETRI_PLACES=451, PETRI_TRANSITIONS=504} [2024-05-12 10:53:13,019 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 398 predicate places. [2024-05-12 10:53:13,019 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 504 transitions, 7659 flow [2024-05-12 10:53:13,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:13,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:13,019 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, 1, 1] [2024-05-12 10:53:13,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-05-12 10:53:13,020 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:13,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -750906435, now seen corresponding path program 12 times [2024-05-12 10:53:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:13,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070061591] [2024-05-12 10:53:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:13,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:13,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:13,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070061591] [2024-05-12 10:53:13,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070061591] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:13,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:13,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:53:13,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668930049] [2024-05-12 10:53:13,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:13,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:53:13,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:13,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:53:13,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:53:13,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:53:13,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 504 transitions, 7659 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:13,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:13,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:53:13,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:15,081 INFO L124 PetriNetUnfolderBase]: 4475/7829 cut-off events. [2024-05-12 10:53:15,082 INFO L125 PetriNetUnfolderBase]: For 828391/828403 co-relation queries the response was YES. [2024-05-12 10:53:15,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54700 conditions, 7829 events. 4475/7829 cut-off events. For 828391/828403 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 59046 event pairs, 1321 based on Foata normal form. 2/7493 useless extension candidates. Maximal degree in co-relation 54518. Up to 6593 conditions per place. [2024-05-12 10:53:15,211 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 433 selfloop transitions, 92 changer transitions 0/541 dead transitions. [2024-05-12 10:53:15,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 541 transitions, 8875 flow [2024-05-12 10:53:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:53:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:53:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 283 transitions. [2024-05-12 10:53:15,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775510204081633 [2024-05-12 10:53:15,212 INFO L175 Difference]: Start difference. First operand has 451 places, 504 transitions, 7659 flow. Second operand 10 states and 283 transitions. [2024-05-12 10:53:15,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 541 transitions, 8875 flow [2024-05-12 10:53:20,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 541 transitions, 8631 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-05-12 10:53:20,351 INFO L231 Difference]: Finished difference. Result has 456 places, 506 transitions, 7684 flow [2024-05-12 10:53:20,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7457, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7684, PETRI_PLACES=456, PETRI_TRANSITIONS=506} [2024-05-12 10:53:20,352 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 403 predicate places. [2024-05-12 10:53:20,352 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 506 transitions, 7684 flow [2024-05-12 10:53:20,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:20,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:20,352 INFO 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] [2024-05-12 10:53:20,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-05-12 10:53:20,353 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:20,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:20,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1641313213, now seen corresponding path program 13 times [2024-05-12 10:53:20,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:20,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921802856] [2024-05-12 10:53:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:20,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:20,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:20,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921802856] [2024-05-12 10:53:20,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921802856] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:20,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:20,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:53:20,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444275154] [2024-05-12 10:53:20,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:20,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:53:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:20,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:53:20,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:53:20,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:53:20,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 506 transitions, 7684 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:20,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:20,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:53:20,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:22,541 INFO L124 PetriNetUnfolderBase]: 4496/7865 cut-off events. [2024-05-12 10:53:22,541 INFO L125 PetriNetUnfolderBase]: For 830902/830914 co-relation queries the response was YES. [2024-05-12 10:53:22,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54319 conditions, 7865 events. 4496/7865 cut-off events. For 830902/830914 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 59341 event pairs, 1323 based on Foata normal form. 2/7527 useless extension candidates. Maximal degree in co-relation 54135. Up to 6624 conditions per place. [2024-05-12 10:53:22,662 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 436 selfloop transitions, 93 changer transitions 0/545 dead transitions. [2024-05-12 10:53:22,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 545 transitions, 8874 flow [2024-05-12 10:53:22,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:53:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:53:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 329 transitions. [2024-05-12 10:53:22,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-05-12 10:53:22,663 INFO L175 Difference]: Start difference. First operand has 456 places, 506 transitions, 7684 flow. Second operand 12 states and 329 transitions. [2024-05-12 10:53:22,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 545 transitions, 8874 flow [2024-05-12 10:53:29,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 545 transitions, 8669 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-05-12 10:53:29,123 INFO L231 Difference]: Finished difference. Result has 460 places, 508 transitions, 7712 flow [2024-05-12 10:53:29,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7479, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7712, PETRI_PLACES=460, PETRI_TRANSITIONS=508} [2024-05-12 10:53:29,124 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 407 predicate places. [2024-05-12 10:53:29,124 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 508 transitions, 7712 flow [2024-05-12 10:53:29,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:29,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:29,124 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] [2024-05-12 10:53:29,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-05-12 10:53:29,124 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:29,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:29,125 INFO L85 PathProgramCache]: Analyzing trace with hash 795337661, now seen corresponding path program 14 times [2024-05-12 10:53:29,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:29,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495478524] [2024-05-12 10:53:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:29,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:29,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:29,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495478524] [2024-05-12 10:53:29,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495478524] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:29,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:29,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:53:29,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042791721] [2024-05-12 10:53:29,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:29,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:53:29,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:29,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:53:29,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:53:29,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:53:29,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 508 transitions, 7712 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:29,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:29,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:53:29,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:31,511 INFO L124 PetriNetUnfolderBase]: 4517/7901 cut-off events. [2024-05-12 10:53:31,511 INFO L125 PetriNetUnfolderBase]: For 843083/843095 co-relation queries the response was YES. [2024-05-12 10:53:31,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54625 conditions, 7901 events. 4517/7901 cut-off events. For 843083/843095 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 59618 event pairs, 1325 based on Foata normal form. 2/7561 useless extension candidates. Maximal degree in co-relation 54440. Up to 6655 conditions per place. [2024-05-12 10:53:31,626 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 429 selfloop transitions, 95 changer transitions 0/540 dead transitions. [2024-05-12 10:53:31,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 540 transitions, 8878 flow [2024-05-12 10:53:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:53:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:53:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 299 transitions. [2024-05-12 10:53:31,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547309833024119 [2024-05-12 10:53:31,628 INFO L175 Difference]: Start difference. First operand has 460 places, 508 transitions, 7712 flow. Second operand 11 states and 299 transitions. [2024-05-12 10:53:31,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 540 transitions, 8878 flow [2024-05-12 10:53:38,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 540 transitions, 8683 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-05-12 10:53:38,125 INFO L231 Difference]: Finished difference. Result has 463 places, 510 transitions, 7758 flow [2024-05-12 10:53:38,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7517, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7758, PETRI_PLACES=463, PETRI_TRANSITIONS=510} [2024-05-12 10:53:38,126 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 410 predicate places. [2024-05-12 10:53:38,126 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 510 transitions, 7758 flow [2024-05-12 10:53:38,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:38,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:38,126 INFO 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] [2024-05-12 10:53:38,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-05-12 10:53:38,127 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:38,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:38,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1345212769, now seen corresponding path program 15 times [2024-05-12 10:53:38,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:38,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483048835] [2024-05-12 10:53:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:38,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:38,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:38,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483048835] [2024-05-12 10:53:38,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483048835] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:38,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:38,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:53:38,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688503531] [2024-05-12 10:53:38,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:38,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:53:38,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:53:38,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:53:38,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:53:38,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 510 transitions, 7758 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:38,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:38,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:53:38,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:40,273 INFO L124 PetriNetUnfolderBase]: 4512/7891 cut-off events. [2024-05-12 10:53:40,273 INFO L125 PetriNetUnfolderBase]: For 837891/837903 co-relation queries the response was YES. [2024-05-12 10:53:40,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54329 conditions, 7891 events. 4512/7891 cut-off events. For 837891/837903 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 59665 event pairs, 1333 based on Foata normal form. 2/7549 useless extension candidates. Maximal degree in co-relation 54143. Up to 6648 conditions per place. [2024-05-12 10:53:40,423 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 424 selfloop transitions, 95 changer transitions 0/535 dead transitions. [2024-05-12 10:53:40,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 535 transitions, 8881 flow [2024-05-12 10:53:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:53:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:53:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 293 transitions. [2024-05-12 10:53:40,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435992578849722 [2024-05-12 10:53:40,424 INFO L175 Difference]: Start difference. First operand has 463 places, 510 transitions, 7758 flow. Second operand 11 states and 293 transitions. [2024-05-12 10:53:40,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 535 transitions, 8881 flow [2024-05-12 10:53:47,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 535 transitions, 8618 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-05-12 10:53:47,114 INFO L231 Difference]: Finished difference. Result has 465 places, 511 transitions, 7717 flow [2024-05-12 10:53:47,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7717, PETRI_PLACES=465, PETRI_TRANSITIONS=511} [2024-05-12 10:53:47,115 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 412 predicate places. [2024-05-12 10:53:47,115 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 511 transitions, 7717 flow [2024-05-12 10:53:47,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:47,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:47,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:53:47,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-05-12 10:53:47,115 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:47,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1546001475, now seen corresponding path program 16 times [2024-05-12 10:53:47,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:47,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267024842] [2024-05-12 10:53:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:47,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:47,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:47,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267024842] [2024-05-12 10:53:47,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267024842] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:47,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:47,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:53:47,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034384140] [2024-05-12 10:53:47,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:47,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:53:47,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:47,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:53:47,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:53:47,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:53:47,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 511 transitions, 7717 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:47,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:47,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:53:47,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:49,227 INFO L124 PetriNetUnfolderBase]: 4507/7884 cut-off events. [2024-05-12 10:53:49,227 INFO L125 PetriNetUnfolderBase]: For 829418/829430 co-relation queries the response was YES. [2024-05-12 10:53:49,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53716 conditions, 7884 events. 4507/7884 cut-off events. For 829418/829430 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 59541 event pairs, 1332 based on Foata normal form. 2/7542 useless extension candidates. Maximal degree in co-relation 53529. Up to 6641 conditions per place. [2024-05-12 10:53:49,363 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 427 selfloop transitions, 94 changer transitions 0/537 dead transitions. [2024-05-12 10:53:49,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 537 transitions, 8840 flow [2024-05-12 10:53:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:53:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:53:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 317 transitions. [2024-05-12 10:53:49,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391156462585034 [2024-05-12 10:53:49,365 INFO L175 Difference]: Start difference. First operand has 465 places, 511 transitions, 7717 flow. Second operand 12 states and 317 transitions. [2024-05-12 10:53:49,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 537 transitions, 8840 flow [2024-05-12 10:53:57,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 537 transitions, 8648 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-05-12 10:53:57,105 INFO L231 Difference]: Finished difference. Result has 469 places, 512 transitions, 7739 flow [2024-05-12 10:53:57,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7533, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7739, PETRI_PLACES=469, PETRI_TRANSITIONS=512} [2024-05-12 10:53:57,106 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 416 predicate places. [2024-05-12 10:53:57,106 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 512 transitions, 7739 flow [2024-05-12 10:53:57,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:57,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:53:57,106 INFO 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] [2024-05-12 10:53:57,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-05-12 10:53:57,107 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:53:57,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:53:57,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1826931779, now seen corresponding path program 17 times [2024-05-12 10:53:57,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:53:57,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530605254] [2024-05-12 10:53:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:53:57,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:53:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:53:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:53:57,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:53:57,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530605254] [2024-05-12 10:53:57,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530605254] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:53:57,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:53:57,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:53:57,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961857769] [2024-05-12 10:53:57,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:53:57,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:53:57,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:53:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:53:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:53:57,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:53:57,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 512 transitions, 7739 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:53:57,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:53:57,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:53:57,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:53:59,243 INFO L124 PetriNetUnfolderBase]: 4502/7875 cut-off events. [2024-05-12 10:53:59,244 INFO L125 PetriNetUnfolderBase]: For 822620/822638 co-relation queries the response was YES. [2024-05-12 10:53:59,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53334 conditions, 7875 events. 4502/7875 cut-off events. For 822620/822638 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 59421 event pairs, 1326 based on Foata normal form. 8/7543 useless extension candidates. Maximal degree in co-relation 53146. Up to 6739 conditions per place. [2024-05-12 10:53:59,370 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 482 selfloop transitions, 29 changer transitions 0/527 dead transitions. [2024-05-12 10:53:59,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 527 transitions, 8815 flow [2024-05-12 10:53:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:53:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:53:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 10:53:59,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565597667638484 [2024-05-12 10:53:59,371 INFO L175 Difference]: Start difference. First operand has 469 places, 512 transitions, 7739 flow. Second operand 7 states and 194 transitions. [2024-05-12 10:53:59,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 527 transitions, 8815 flow [2024-05-12 10:54:06,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 527 transitions, 8606 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-05-12 10:54:06,097 INFO L231 Difference]: Finished difference. Result has 467 places, 513 transitions, 7613 flow [2024-05-12 10:54:06,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7538, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7613, PETRI_PLACES=467, PETRI_TRANSITIONS=513} [2024-05-12 10:54:06,098 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 414 predicate places. [2024-05-12 10:54:06,098 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 513 transitions, 7613 flow [2024-05-12 10:54:06,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:06,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:54:06,098 INFO 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] [2024-05-12 10:54:06,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-05-12 10:54:06,098 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:54:06,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:54:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1829788739, now seen corresponding path program 18 times [2024-05-12 10:54:06,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:54:06,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348258576] [2024-05-12 10:54:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:54:06,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:54:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:54:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:54:06,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:54:06,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348258576] [2024-05-12 10:54:06,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348258576] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:54:06,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:54:06,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:54:06,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180809659] [2024-05-12 10:54:06,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:54:06,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:54:06,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:54:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:54:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:54:06,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:54:06,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 513 transitions, 7613 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:06,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:54:06,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:54:06,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:54:08,324 INFO L124 PetriNetUnfolderBase]: 4497/7885 cut-off events. [2024-05-12 10:54:08,324 INFO L125 PetriNetUnfolderBase]: For 814954/814972 co-relation queries the response was YES. [2024-05-12 10:54:08,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52796 conditions, 7885 events. 4497/7885 cut-off events. For 814954/814972 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 59576 event pairs, 1309 based on Foata normal form. 8/7553 useless extension candidates. Maximal degree in co-relation 52607. Up to 6697 conditions per place. [2024-05-12 10:54:08,438 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 483 selfloop transitions, 33 changer transitions 0/532 dead transitions. [2024-05-12 10:54:08,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 532 transitions, 8710 flow [2024-05-12 10:54:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:54:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:54:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 10:54:08,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-05-12 10:54:08,439 INFO L175 Difference]: Start difference. First operand has 467 places, 513 transitions, 7613 flow. Second operand 8 states and 220 transitions. [2024-05-12 10:54:08,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 532 transitions, 8710 flow [2024-05-12 10:54:14,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 532 transitions, 8625 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 10:54:14,836 INFO L231 Difference]: Finished difference. Result has 470 places, 514 transitions, 7618 flow [2024-05-12 10:54:14,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7536, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7618, PETRI_PLACES=470, PETRI_TRANSITIONS=514} [2024-05-12 10:54:14,837 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 417 predicate places. [2024-05-12 10:54:14,837 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 514 transitions, 7618 flow [2024-05-12 10:54:14,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:14,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:54:14,837 INFO 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] [2024-05-12 10:54:14,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-05-12 10:54:14,837 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:54:14,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:54:14,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1355626269, now seen corresponding path program 12 times [2024-05-12 10:54:14,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:54:14,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120885410] [2024-05-12 10:54:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:54:14,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:54:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:54:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:54:15,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:54:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120885410] [2024-05-12 10:54:15,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120885410] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:54:15,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:54:15,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:54:15,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932703007] [2024-05-12 10:54:15,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:54:15,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:54:15,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:54:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:54:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:54:15,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:54:15,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 514 transitions, 7618 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:15,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:54:15,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:54:15,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:54:16,918 INFO L124 PetriNetUnfolderBase]: 4537/7935 cut-off events. [2024-05-12 10:54:16,918 INFO L125 PetriNetUnfolderBase]: For 835128/835140 co-relation queries the response was YES. [2024-05-12 10:54:17,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53566 conditions, 7935 events. 4537/7935 cut-off events. For 835128/835140 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 59882 event pairs, 1318 based on Foata normal form. 1/7588 useless extension candidates. Maximal degree in co-relation 53376. Up to 6664 conditions per place. [2024-05-12 10:54:17,256 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 492 selfloop transitions, 65 changer transitions 0/573 dead transitions. [2024-05-12 10:54:17,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 573 transitions, 9642 flow [2024-05-12 10:54:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:54:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:54:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 383 transitions. [2024-05-12 10:54:17,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583090379008746 [2024-05-12 10:54:17,258 INFO L175 Difference]: Start difference. First operand has 470 places, 514 transitions, 7618 flow. Second operand 14 states and 383 transitions. [2024-05-12 10:54:17,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 573 transitions, 9642 flow [2024-05-12 10:54:23,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 573 transitions, 9575 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 10:54:23,008 INFO L231 Difference]: Finished difference. Result has 478 places, 526 transitions, 7951 flow [2024-05-12 10:54:23,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7551, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7951, PETRI_PLACES=478, PETRI_TRANSITIONS=526} [2024-05-12 10:54:23,009 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 425 predicate places. [2024-05-12 10:54:23,009 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 526 transitions, 7951 flow [2024-05-12 10:54:23,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:23,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:54:23,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:54:23,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-05-12 10:54:23,009 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:54:23,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:54:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1367054109, now seen corresponding path program 13 times [2024-05-12 10:54:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:54:23,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262485357] [2024-05-12 10:54:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:54:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:54:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:54:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:54:23,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:54:23,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262485357] [2024-05-12 10:54:23,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262485357] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:54:23,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:54:23,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:54:23,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722301226] [2024-05-12 10:54:23,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:54:23,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:54:23,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:54:23,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:54:23,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:54:23,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:54:23,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 526 transitions, 7951 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:23,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:54:23,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:54:23,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:54:25,133 INFO L124 PetriNetUnfolderBase]: 4534/7931 cut-off events. [2024-05-12 10:54:25,134 INFO L125 PetriNetUnfolderBase]: For 838069/838081 co-relation queries the response was YES. [2024-05-12 10:54:25,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53615 conditions, 7931 events. 4534/7931 cut-off events. For 838069/838081 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 59847 event pairs, 1318 based on Foata normal form. 1/7584 useless extension candidates. Maximal degree in co-relation 53424. Up to 6661 conditions per place. [2024-05-12 10:54:25,278 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 486 selfloop transitions, 65 changer transitions 0/567 dead transitions. [2024-05-12 10:54:25,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 567 transitions, 9425 flow [2024-05-12 10:54:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:54:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:54:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 333 transitions. [2024-05-12 10:54:25,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663265306122449 [2024-05-12 10:54:25,280 INFO L175 Difference]: Start difference. First operand has 478 places, 526 transitions, 7951 flow. Second operand 12 states and 333 transitions. [2024-05-12 10:54:25,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 567 transitions, 9425 flow [2024-05-12 10:54:32,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 567 transitions, 9235 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-05-12 10:54:32,307 INFO L231 Difference]: Finished difference. Result has 482 places, 526 transitions, 7897 flow [2024-05-12 10:54:32,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7897, PETRI_PLACES=482, PETRI_TRANSITIONS=526} [2024-05-12 10:54:32,320 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 429 predicate places. [2024-05-12 10:54:32,321 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 526 transitions, 7897 flow [2024-05-12 10:54:32,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:32,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:54:32,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:54:32,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-05-12 10:54:32,321 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:54:32,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:54:32,322 INFO L85 PathProgramCache]: Analyzing trace with hash -755663075, now seen corresponding path program 14 times [2024-05-12 10:54:32,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:54:32,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141142052] [2024-05-12 10:54:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:54:32,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:54:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:54:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:54:32,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:54:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141142052] [2024-05-12 10:54:32,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141142052] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:54:32,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:54:32,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:54:32,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131768039] [2024-05-12 10:54:32,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:54:32,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:54:32,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:54:32,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:54:32,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:54:32,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:54:32,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 526 transitions, 7897 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:32,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:54:32,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:54:32,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:54:34,477 INFO L124 PetriNetUnfolderBase]: 4531/7927 cut-off events. [2024-05-12 10:54:34,477 INFO L125 PetriNetUnfolderBase]: For 838573/838585 co-relation queries the response was YES. [2024-05-12 10:54:34,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53557 conditions, 7927 events. 4531/7927 cut-off events. For 838573/838585 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 59854 event pairs, 1318 based on Foata normal form. 1/7580 useless extension candidates. Maximal degree in co-relation 53364. Up to 6667 conditions per place. [2024-05-12 10:54:34,622 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 490 selfloop transitions, 55 changer transitions 0/561 dead transitions. [2024-05-12 10:54:34,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 561 transitions, 9075 flow [2024-05-12 10:54:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:54:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:54:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 282 transitions. [2024-05-12 10:54:34,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755102040816327 [2024-05-12 10:54:34,623 INFO L175 Difference]: Start difference. First operand has 482 places, 526 transitions, 7897 flow. Second operand 10 states and 282 transitions. [2024-05-12 10:54:34,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 561 transitions, 9075 flow [2024-05-12 10:54:41,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 561 transitions, 8931 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-05-12 10:54:41,901 INFO L231 Difference]: Finished difference. Result has 483 places, 526 transitions, 7869 flow [2024-05-12 10:54:41,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7753, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7869, PETRI_PLACES=483, PETRI_TRANSITIONS=526} [2024-05-12 10:54:41,901 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 430 predicate places. [2024-05-12 10:54:41,902 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 526 transitions, 7869 flow [2024-05-12 10:54:41,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:41,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:54:41,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:54:41,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-05-12 10:54:41,902 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:54:41,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:54:41,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1859603135, now seen corresponding path program 15 times [2024-05-12 10:54:41,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:54:41,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889407431] [2024-05-12 10:54:41,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:54:41,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:54:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:54:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:54:42,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:54:42,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889407431] [2024-05-12 10:54:42,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889407431] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:54:42,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:54:42,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:54:42,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919349241] [2024-05-12 10:54:42,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:54:42,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:54:42,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:54:42,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:54:42,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:54:42,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:54:42,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 526 transitions, 7869 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:42,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:54:42,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:54:42,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:54:44,029 INFO L124 PetriNetUnfolderBase]: 4548/7955 cut-off events. [2024-05-12 10:54:44,029 INFO L125 PetriNetUnfolderBase]: For 860327/860339 co-relation queries the response was YES. [2024-05-12 10:54:44,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54012 conditions, 7955 events. 4548/7955 cut-off events. For 860327/860339 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 60085 event pairs, 1321 based on Foata normal form. 1/7602 useless extension candidates. Maximal degree in co-relation 53818. Up to 6490 conditions per place. [2024-05-12 10:54:44,163 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 357 selfloop transitions, 194 changer transitions 0/567 dead transitions. [2024-05-12 10:54:44,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 567 transitions, 10037 flow [2024-05-12 10:54:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:54:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:54:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 289 transitions. [2024-05-12 10:54:44,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897959183673469 [2024-05-12 10:54:44,164 INFO L175 Difference]: Start difference. First operand has 483 places, 526 transitions, 7869 flow. Second operand 10 states and 289 transitions. [2024-05-12 10:54:44,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 567 transitions, 10037 flow [2024-05-12 10:54:51,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 567 transitions, 9923 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 10:54:51,499 INFO L231 Difference]: Finished difference. Result has 484 places, 532 transitions, 8307 flow [2024-05-12 10:54:51,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7755, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8307, PETRI_PLACES=484, PETRI_TRANSITIONS=532} [2024-05-12 10:54:51,500 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 431 predicate places. [2024-05-12 10:54:51,500 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 532 transitions, 8307 flow [2024-05-12 10:54:51,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:51,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:54:51,500 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, 1] [2024-05-12 10:54:51,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-05-12 10:54:51,501 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:54:51,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:54:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1717969407, now seen corresponding path program 16 times [2024-05-12 10:54:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:54:51,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327440252] [2024-05-12 10:54:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:54:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:54:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:54:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:54:51,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:54:51,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327440252] [2024-05-12 10:54:51,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327440252] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:54:51,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:54:51,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:54:51,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556225259] [2024-05-12 10:54:51,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:54:51,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:54:51,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:54:51,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:54:51,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:54:51,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:54:51,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 532 transitions, 8307 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:54:51,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:54:51,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:54:51,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:54:53,691 INFO L124 PetriNetUnfolderBase]: 4565/7981 cut-off events. [2024-05-12 10:54:53,691 INFO L125 PetriNetUnfolderBase]: For 884480/884492 co-relation queries the response was YES. [2024-05-12 10:54:53,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54884 conditions, 7981 events. 4565/7981 cut-off events. For 884480/884492 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 60356 event pairs, 1321 based on Foata normal form. 1/7624 useless extension candidates. Maximal degree in co-relation 54689. Up to 6509 conditions per place. [2024-05-12 10:54:53,814 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 356 selfloop transitions, 205 changer transitions 0/577 dead transitions. [2024-05-12 10:54:53,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 577 transitions, 10797 flow [2024-05-12 10:54:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:54:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:54:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 360 transitions. [2024-05-12 10:54:53,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565149136577708 [2024-05-12 10:54:53,816 INFO L175 Difference]: Start difference. First operand has 484 places, 532 transitions, 8307 flow. Second operand 13 states and 360 transitions. [2024-05-12 10:54:53,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 577 transitions, 10797 flow [2024-05-12 10:55:00,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 577 transitions, 10250 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-05-12 10:55:00,500 INFO L231 Difference]: Finished difference. Result has 490 places, 538 transitions, 8346 flow [2024-05-12 10:55:00,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7808, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8346, PETRI_PLACES=490, PETRI_TRANSITIONS=538} [2024-05-12 10:55:00,501 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 437 predicate places. [2024-05-12 10:55:00,501 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 538 transitions, 8346 flow [2024-05-12 10:55:00,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:00,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:00,502 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, 1, 1] [2024-05-12 10:55:00,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-05-12 10:55:00,502 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:55:00,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1641318173, now seen corresponding path program 17 times [2024-05-12 10:55:00,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:00,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043225529] [2024-05-12 10:55:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:00,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:00,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043225529] [2024-05-12 10:55:00,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043225529] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:55:00,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:55:00,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:55:00,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930844147] [2024-05-12 10:55:00,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:00,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:55:00,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:55:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:55:00,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:55:00,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 538 transitions, 8346 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:00,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:00,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:55:00,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:02,735 INFO L124 PetriNetUnfolderBase]: 4562/7977 cut-off events. [2024-05-12 10:55:02,735 INFO L125 PetriNetUnfolderBase]: For 883650/883662 co-relation queries the response was YES. [2024-05-12 10:55:02,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54582 conditions, 7977 events. 4562/7977 cut-off events. For 883650/883662 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 60259 event pairs, 1321 based on Foata normal form. 1/7620 useless extension candidates. Maximal degree in co-relation 54386. Up to 6506 conditions per place. [2024-05-12 10:55:02,854 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 357 selfloop transitions, 203 changer transitions 0/576 dead transitions. [2024-05-12 10:55:02,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 576 transitions, 10670 flow [2024-05-12 10:55:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:55:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:55:02,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 338 transitions. [2024-05-12 10:55:02,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-05-12 10:55:02,855 INFO L175 Difference]: Start difference. First operand has 490 places, 538 transitions, 8346 flow. Second operand 12 states and 338 transitions. [2024-05-12 10:55:02,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 576 transitions, 10670 flow [2024-05-12 10:55:09,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 576 transitions, 10161 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-05-12 10:55:09,870 INFO L231 Difference]: Finished difference. Result has 493 places, 538 transitions, 8249 flow [2024-05-12 10:55:09,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7837, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8249, PETRI_PLACES=493, PETRI_TRANSITIONS=538} [2024-05-12 10:55:09,871 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 440 predicate places. [2024-05-12 10:55:09,871 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 538 transitions, 8249 flow [2024-05-12 10:55:09,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:09,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:09,871 INFO 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] [2024-05-12 10:55:09,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-05-12 10:55:09,872 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:55:09,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1118568221, now seen corresponding path program 18 times [2024-05-12 10:55:09,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:09,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761237346] [2024-05-12 10:55:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:09,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:10,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761237346] [2024-05-12 10:55:10,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761237346] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:55:10,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:55:10,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:55:10,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117523529] [2024-05-12 10:55:10,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:10,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:55:10,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:10,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:55:10,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:55:10,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:55:10,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 538 transitions, 8249 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:10,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:10,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:55:10,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:12,102 INFO L124 PetriNetUnfolderBase]: 4569/7986 cut-off events. [2024-05-12 10:55:12,103 INFO L125 PetriNetUnfolderBase]: For 893607/893619 co-relation queries the response was YES. [2024-05-12 10:55:12,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54591 conditions, 7986 events. 4569/7986 cut-off events. For 893607/893619 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 60196 event pairs, 1318 based on Foata normal form. 1/7629 useless extension candidates. Maximal degree in co-relation 54394. Up to 6672 conditions per place. [2024-05-12 10:55:12,220 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 469 selfloop transitions, 99 changer transitions 0/584 dead transitions. [2024-05-12 10:55:12,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 584 transitions, 9839 flow [2024-05-12 10:55:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:55:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:55:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 377 transitions. [2024-05-12 10:55:12,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495626822157434 [2024-05-12 10:55:12,222 INFO L175 Difference]: Start difference. First operand has 493 places, 538 transitions, 8249 flow. Second operand 14 states and 377 transitions. [2024-05-12 10:55:12,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 584 transitions, 9839 flow [2024-05-12 10:55:19,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 584 transitions, 9364 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-05-12 10:55:19,507 INFO L231 Difference]: Finished difference. Result has 497 places, 541 transitions, 8060 flow [2024-05-12 10:55:19,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7783, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8060, PETRI_PLACES=497, PETRI_TRANSITIONS=541} [2024-05-12 10:55:19,507 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 444 predicate places. [2024-05-12 10:55:19,507 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 541 transitions, 8060 flow [2024-05-12 10:55:19,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:19,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:19,508 INFO 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] [2024-05-12 10:55:19,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-05-12 10:55:19,508 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:55:19,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:19,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1129996061, now seen corresponding path program 19 times [2024-05-12 10:55:19,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:19,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972135905] [2024-05-12 10:55:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:19,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:19,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:19,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972135905] [2024-05-12 10:55:19,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972135905] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:55:19,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:55:19,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:55:19,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444819144] [2024-05-12 10:55:19,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:19,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:55:19,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:19,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:55:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:55:19,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:55:19,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 541 transitions, 8060 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:19,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:19,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:55:19,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:21,767 INFO L124 PetriNetUnfolderBase]: 4566/7982 cut-off events. [2024-05-12 10:55:21,767 INFO L125 PetriNetUnfolderBase]: For 892616/892628 co-relation queries the response was YES. [2024-05-12 10:55:21,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54210 conditions, 7982 events. 4566/7982 cut-off events. For 892616/892628 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 60290 event pairs, 1318 based on Foata normal form. 1/7625 useless extension candidates. Maximal degree in co-relation 54011. Up to 6669 conditions per place. [2024-05-12 10:55:21,881 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 470 selfloop transitions, 98 changer transitions 0/584 dead transitions. [2024-05-12 10:55:21,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 584 transitions, 9584 flow [2024-05-12 10:55:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:55:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:55:21,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 379 transitions. [2024-05-12 10:55:21,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524781341107872 [2024-05-12 10:55:21,882 INFO L175 Difference]: Start difference. First operand has 497 places, 541 transitions, 8060 flow. Second operand 14 states and 379 transitions. [2024-05-12 10:55:21,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 584 transitions, 9584 flow [2024-05-12 10:55:28,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 584 transitions, 9274 flow, removed 30 selfloop flow, removed 13 redundant places. [2024-05-12 10:55:28,367 INFO L231 Difference]: Finished difference. Result has 498 places, 541 transitions, 7952 flow [2024-05-12 10:55:28,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7750, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7952, PETRI_PLACES=498, PETRI_TRANSITIONS=541} [2024-05-12 10:55:28,367 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 445 predicate places. [2024-05-12 10:55:28,367 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 541 transitions, 7952 flow [2024-05-12 10:55:28,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:28,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:28,368 INFO 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] [2024-05-12 10:55:28,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-05-12 10:55:28,368 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:55:28,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:28,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1057607453, now seen corresponding path program 20 times [2024-05-12 10:55:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:28,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329530345] [2024-05-12 10:55:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:28,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:28,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:28,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329530345] [2024-05-12 10:55:28,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329530345] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:55:28,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:55:28,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:55:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994460310] [2024-05-12 10:55:28,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:28,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:55:28,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:55:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:55:28,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:55:28,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 541 transitions, 7952 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:28,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:28,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:55:28,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:30,705 INFO L124 PetriNetUnfolderBase]: 4563/7978 cut-off events. [2024-05-12 10:55:30,706 INFO L125 PetriNetUnfolderBase]: For 893501/893513 co-relation queries the response was YES. [2024-05-12 10:55:30,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53850 conditions, 7978 events. 4563/7978 cut-off events. For 893501/893513 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 60175 event pairs, 1318 based on Foata normal form. 1/7621 useless extension candidates. Maximal degree in co-relation 53651. Up to 6666 conditions per place. [2024-05-12 10:55:30,822 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 461 selfloop transitions, 97 changer transitions 0/574 dead transitions. [2024-05-12 10:55:30,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 574 transitions, 9150 flow [2024-05-12 10:55:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:55:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:55:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2024-05-12 10:55:30,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-05-12 10:55:30,824 INFO L175 Difference]: Start difference. First operand has 498 places, 541 transitions, 7952 flow. Second operand 11 states and 301 transitions. [2024-05-12 10:55:30,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 574 transitions, 9150 flow [2024-05-12 10:55:38,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 574 transitions, 8894 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-05-12 10:55:38,518 INFO L231 Difference]: Finished difference. Result has 496 places, 541 transitions, 7896 flow [2024-05-12 10:55:38,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7696, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7896, PETRI_PLACES=496, PETRI_TRANSITIONS=541} [2024-05-12 10:55:38,519 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 443 predicate places. [2024-05-12 10:55:38,519 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 541 transitions, 7896 flow [2024-05-12 10:55:38,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:38,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:38,519 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] [2024-05-12 10:55:38,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-05-12 10:55:38,519 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:55:38,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:38,520 INFO L85 PathProgramCache]: Analyzing trace with hash -101827743, now seen corresponding path program 21 times [2024-05-12 10:55:38,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:38,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227168927] [2024-05-12 10:55:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:38,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:38,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:38,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227168927] [2024-05-12 10:55:38,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227168927] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:55:38,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:55:38,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:55:38,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141422223] [2024-05-12 10:55:38,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:38,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:55:38,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:55:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:55:38,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:55:38,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 541 transitions, 7896 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:38,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:38,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:55:38,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:40,566 INFO L124 PetriNetUnfolderBase]: 4590/8021 cut-off events. [2024-05-12 10:55:40,566 INFO L125 PetriNetUnfolderBase]: For 926352/926364 co-relation queries the response was YES. [2024-05-12 10:55:40,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54532 conditions, 8021 events. 4590/8021 cut-off events. For 926352/926364 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 60592 event pairs, 1321 based on Foata normal form. 1/7656 useless extension candidates. Maximal degree in co-relation 54332. Up to 6538 conditions per place. [2024-05-12 10:55:40,703 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 345 selfloop transitions, 221 changer transitions 0/582 dead transitions. [2024-05-12 10:55:40,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 582 transitions, 10157 flow [2024-05-12 10:55:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:55:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:55:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 352 transitions. [2024-05-12 10:55:40,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525902668759811 [2024-05-12 10:55:40,705 INFO L175 Difference]: Start difference. First operand has 496 places, 541 transitions, 7896 flow. Second operand 13 states and 352 transitions. [2024-05-12 10:55:40,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 582 transitions, 10157 flow [2024-05-12 10:55:47,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 582 transitions, 9953 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-05-12 10:55:47,989 INFO L231 Difference]: Finished difference. Result has 498 places, 550 transitions, 8335 flow [2024-05-12 10:55:47,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7692, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8335, PETRI_PLACES=498, PETRI_TRANSITIONS=550} [2024-05-12 10:55:47,989 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 445 predicate places. [2024-05-12 10:55:47,989 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 550 transitions, 8335 flow [2024-05-12 10:55:47,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:47,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:47,990 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, 1, 1] [2024-05-12 10:55:47,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-05-12 10:55:47,990 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:55:47,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:47,990 INFO L85 PathProgramCache]: Analyzing trace with hash -653671855, now seen corresponding path program 22 times [2024-05-12 10:55:47,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:47,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723819218] [2024-05-12 10:55:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:47,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:48,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:48,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723819218] [2024-05-12 10:55:48,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723819218] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:55:48,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:55:48,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:55:48,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071553241] [2024-05-12 10:55:48,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:48,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:55:48,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:48,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:55:48,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:55:48,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:55:48,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 550 transitions, 8335 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:48,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:48,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:55:48,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:50,096 INFO L124 PetriNetUnfolderBase]: 4587/8017 cut-off events. [2024-05-12 10:55:50,097 INFO L125 PetriNetUnfolderBase]: For 929419/929431 co-relation queries the response was YES. [2024-05-12 10:55:50,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54735 conditions, 8017 events. 4587/8017 cut-off events. For 929419/929431 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 60625 event pairs, 1321 based on Foata normal form. 1/7652 useless extension candidates. Maximal degree in co-relation 54534. Up to 6535 conditions per place. [2024-05-12 10:55:50,244 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 343 selfloop transitions, 220 changer transitions 0/579 dead transitions. [2024-05-12 10:55:50,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 579 transitions, 10107 flow [2024-05-12 10:55:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:55:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:55:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2024-05-12 10:55:50,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658627087198516 [2024-05-12 10:55:50,245 INFO L175 Difference]: Start difference. First operand has 498 places, 550 transitions, 8335 flow. Second operand 11 states and 305 transitions. [2024-05-12 10:55:50,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 579 transitions, 10107 flow [2024-05-12 10:55:56,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 579 transitions, 9658 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-05-12 10:55:56,957 INFO L231 Difference]: Finished difference. Result has 501 places, 550 transitions, 8332 flow [2024-05-12 10:55:56,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7886, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8332, PETRI_PLACES=501, PETRI_TRANSITIONS=550} [2024-05-12 10:55:56,958 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 448 predicate places. [2024-05-12 10:55:56,958 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 550 transitions, 8332 flow [2024-05-12 10:55:56,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:56,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:56,958 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, 1] [2024-05-12 10:55:56,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-05-12 10:55:56,958 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:55:56,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1601131793, now seen corresponding path program 23 times [2024-05-12 10:55:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:56,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220974962] [2024-05-12 10:55:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:56,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:57,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:57,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220974962] [2024-05-12 10:55:57,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220974962] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:55:57,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:55:57,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:55:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011889372] [2024-05-12 10:55:57,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:57,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:55:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:55:57,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:55:57,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:55:57,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 550 transitions, 8332 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:57,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:57,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:55:57,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:59,057 INFO L124 PetriNetUnfolderBase]: 4584/8013 cut-off events. [2024-05-12 10:55:59,058 INFO L125 PetriNetUnfolderBase]: For 931084/931096 co-relation queries the response was YES. [2024-05-12 10:55:59,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54565 conditions, 8013 events. 4584/8013 cut-off events. For 931084/931096 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 60602 event pairs, 1321 based on Foata normal form. 1/7648 useless extension candidates. Maximal degree in co-relation 54363. Up to 6532 conditions per place. [2024-05-12 10:55:59,185 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 336 selfloop transitions, 227 changer transitions 0/579 dead transitions. [2024-05-12 10:55:59,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 579 transitions, 9818 flow [2024-05-12 10:55:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:55:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:55:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 326 transitions. [2024-05-12 10:55:59,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-05-12 10:55:59,186 INFO L175 Difference]: Start difference. First operand has 501 places, 550 transitions, 8332 flow. Second operand 12 states and 326 transitions. [2024-05-12 10:55:59,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 579 transitions, 9818 flow [2024-05-12 10:56:06,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 579 transitions, 9363 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-05-12 10:56:06,828 INFO L231 Difference]: Finished difference. Result has 504 places, 550 transitions, 8337 flow [2024-05-12 10:56:06,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7877, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8337, PETRI_PLACES=504, PETRI_TRANSITIONS=550} [2024-05-12 10:56:06,829 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 451 predicate places. [2024-05-12 10:56:06,829 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 550 transitions, 8337 flow [2024-05-12 10:56:06,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:06,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:56:06,830 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, 1, 1] [2024-05-12 10:56:06,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-05-12 10:56:06,830 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:56:06,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:56:06,830 INFO L85 PathProgramCache]: Analyzing trace with hash -750894531, now seen corresponding path program 10 times [2024-05-12 10:56:06,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:56:06,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846517921] [2024-05-12 10:56:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:56:06,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:56:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:56:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:07,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:56:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846517921] [2024-05-12 10:56:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846517921] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:56:07,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:56:07,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:56:07,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124270588] [2024-05-12 10:56:07,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:56:07,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:56:07,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:56:07,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:56:07,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:56:07,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:56:07,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 550 transitions, 8337 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:07,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:56:07,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:56:07,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:56:09,034 INFO L124 PetriNetUnfolderBase]: 4591/8026 cut-off events. [2024-05-12 10:56:09,034 INFO L125 PetriNetUnfolderBase]: For 942959/942979 co-relation queries the response was YES. [2024-05-12 10:56:09,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54727 conditions, 8026 events. 4591/8026 cut-off events. For 942959/942979 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 60681 event pairs, 1325 based on Foata normal form. 6/7667 useless extension candidates. Maximal degree in co-relation 54524. Up to 6623 conditions per place. [2024-05-12 10:56:09,163 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 397 selfloop transitions, 174 changer transitions 0/587 dead transitions. [2024-05-12 10:56:09,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 587 transitions, 10203 flow [2024-05-12 10:56:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:56:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:56:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 289 transitions. [2024-05-12 10:56:09,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897959183673469 [2024-05-12 10:56:09,165 INFO L175 Difference]: Start difference. First operand has 504 places, 550 transitions, 8337 flow. Second operand 10 states and 289 transitions. [2024-05-12 10:56:09,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 587 transitions, 10203 flow [2024-05-12 10:56:18,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 587 transitions, 9721 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-05-12 10:56:18,736 INFO L231 Difference]: Finished difference. Result has 502 places, 553 transitions, 8265 flow [2024-05-12 10:56:18,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7855, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8265, PETRI_PLACES=502, PETRI_TRANSITIONS=553} [2024-05-12 10:56:18,738 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 449 predicate places. [2024-05-12 10:56:18,738 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 553 transitions, 8265 flow [2024-05-12 10:56:18,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:18,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:56:18,738 INFO 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] [2024-05-12 10:56:18,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-05-12 10:56:18,739 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:56:18,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:56:18,739 INFO L85 PathProgramCache]: Analyzing trace with hash 192310641, now seen corresponding path program 11 times [2024-05-12 10:56:18,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:56:18,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160430481] [2024-05-12 10:56:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:56:18,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:56:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:56:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:19,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:56:19,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160430481] [2024-05-12 10:56:19,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160430481] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:56:19,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:56:19,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:56:19,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488381544] [2024-05-12 10:56:19,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:56:19,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:56:19,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:56:19,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:56:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:56:19,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:56:19,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 553 transitions, 8265 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:19,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:56:19,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:56:19,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:56:21,032 INFO L124 PetriNetUnfolderBase]: 4598/8037 cut-off events. [2024-05-12 10:56:21,032 INFO L125 PetriNetUnfolderBase]: For 954200/954220 co-relation queries the response was YES. [2024-05-12 10:56:21,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54698 conditions, 8037 events. 4598/8037 cut-off events. For 954200/954220 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 60742 event pairs, 1325 based on Foata normal form. 6/7676 useless extension candidates. Maximal degree in co-relation 54495. Up to 6631 conditions per place. [2024-05-12 10:56:21,161 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 399 selfloop transitions, 178 changer transitions 0/593 dead transitions. [2024-05-12 10:56:21,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 593 transitions, 10453 flow [2024-05-12 10:56:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:56:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:56:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-05-12 10:56:21,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576530612244898 [2024-05-12 10:56:21,162 INFO L175 Difference]: Start difference. First operand has 502 places, 553 transitions, 8265 flow. Second operand 12 states and 339 transitions. [2024-05-12 10:56:21,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 593 transitions, 10453 flow [2024-05-12 10:56:29,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 593 transitions, 9970 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-05-12 10:56:29,814 INFO L231 Difference]: Finished difference. Result has 506 places, 556 transitions, 8206 flow [2024-05-12 10:56:29,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7798, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8206, PETRI_PLACES=506, PETRI_TRANSITIONS=556} [2024-05-12 10:56:29,814 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 453 predicate places. [2024-05-12 10:56:29,814 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 556 transitions, 8206 flow [2024-05-12 10:56:29,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:29,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:56:29,815 INFO 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] [2024-05-12 10:56:29,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-05-12 10:56:29,815 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:56:29,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:56:29,815 INFO L85 PathProgramCache]: Analyzing trace with hash 192698451, now seen corresponding path program 12 times [2024-05-12 10:56:29,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:56:29,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575364826] [2024-05-12 10:56:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:56:29,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:56:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:56:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:30,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:56:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575364826] [2024-05-12 10:56:30,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575364826] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:56:30,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:56:30,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:56:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40569801] [2024-05-12 10:56:30,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:56:30,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:56:30,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:56:30,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:56:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:56:30,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:56:30,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 556 transitions, 8206 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:30,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:56:30,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:56:30,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:56:32,048 INFO L124 PetriNetUnfolderBase]: 4595/8033 cut-off events. [2024-05-12 10:56:32,048 INFO L125 PetriNetUnfolderBase]: For 953968/953988 co-relation queries the response was YES. [2024-05-12 10:56:32,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54331 conditions, 8033 events. 4595/8033 cut-off events. For 953968/953988 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 60674 event pairs, 1325 based on Foata normal form. 6/7672 useless extension candidates. Maximal degree in co-relation 54128. Up to 6628 conditions per place. [2024-05-12 10:56:32,184 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 397 selfloop transitions, 180 changer transitions 0/593 dead transitions. [2024-05-12 10:56:32,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 593 transitions, 10042 flow [2024-05-12 10:56:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:56:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:56:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 358 transitions. [2024-05-12 10:56:32,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5620094191522763 [2024-05-12 10:56:32,185 INFO L175 Difference]: Start difference. First operand has 506 places, 556 transitions, 8206 flow. Second operand 13 states and 358 transitions. [2024-05-12 10:56:32,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 593 transitions, 10042 flow [2024-05-12 10:56:40,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 593 transitions, 9648 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-05-12 10:56:40,047 INFO L231 Difference]: Finished difference. Result has 510 places, 556 transitions, 8178 flow [2024-05-12 10:56:40,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7812, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8178, PETRI_PLACES=510, PETRI_TRANSITIONS=556} [2024-05-12 10:56:40,048 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 457 predicate places. [2024-05-12 10:56:40,048 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 556 transitions, 8178 flow [2024-05-12 10:56:40,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:40,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:56:40,049 INFO 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] [2024-05-12 10:56:40,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-05-12 10:56:40,049 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:56:40,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:56:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash -640332431, now seen corresponding path program 13 times [2024-05-12 10:56:40,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:56:40,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5650010] [2024-05-12 10:56:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:56:40,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:56:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:56:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:40,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:56:40,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5650010] [2024-05-12 10:56:40,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5650010] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:56:40,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:56:40,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:56:40,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573497375] [2024-05-12 10:56:40,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:56:40,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:56:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:56:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:56:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:56:40,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:56:40,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 556 transitions, 8178 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:40,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:56:40,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:56:40,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:56:42,325 INFO L124 PetriNetUnfolderBase]: 4622/8074 cut-off events. [2024-05-12 10:56:42,326 INFO L125 PetriNetUnfolderBase]: For 988672/988692 co-relation queries the response was YES. [2024-05-12 10:56:42,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55005 conditions, 8074 events. 4622/8074 cut-off events. For 988672/988692 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 61031 event pairs, 1325 based on Foata normal form. 6/7707 useless extension candidates. Maximal degree in co-relation 54801. Up to 6658 conditions per place. [2024-05-12 10:56:42,456 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 393 selfloop transitions, 188 changer transitions 0/597 dead transitions. [2024-05-12 10:56:42,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 597 transitions, 10502 flow [2024-05-12 10:56:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:56:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:56:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 354 transitions. [2024-05-12 10:56:42,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5557299843014128 [2024-05-12 10:56:42,457 INFO L175 Difference]: Start difference. First operand has 510 places, 556 transitions, 8178 flow. Second operand 13 states and 354 transitions. [2024-05-12 10:56:42,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 597 transitions, 10502 flow [2024-05-12 10:56:50,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 597 transitions, 10151 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-05-12 10:56:50,555 INFO L231 Difference]: Finished difference. Result has 513 places, 565 transitions, 8401 flow [2024-05-12 10:56:50,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7836, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8401, PETRI_PLACES=513, PETRI_TRANSITIONS=565} [2024-05-12 10:56:50,556 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 460 predicate places. [2024-05-12 10:56:50,556 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 565 transitions, 8401 flow [2024-05-12 10:56:50,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:50,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:56:50,556 INFO 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] [2024-05-12 10:56:50,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-05-12 10:56:50,557 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:56:50,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:56:50,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2080911617, now seen corresponding path program 14 times [2024-05-12 10:56:50,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:56:50,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314662020] [2024-05-12 10:56:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:56:50,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:56:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:56:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:50,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:56:50,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314662020] [2024-05-12 10:56:50,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314662020] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:56:50,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:56:50,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:56:50,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078751848] [2024-05-12 10:56:50,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:56:50,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:56:50,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:56:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:56:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:56:51,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:56:51,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 565 transitions, 8401 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:51,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:56:51,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:56:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:56:52,776 INFO L124 PetriNetUnfolderBase]: 4619/8070 cut-off events. [2024-05-12 10:56:52,776 INFO L125 PetriNetUnfolderBase]: For 989821/989841 co-relation queries the response was YES. [2024-05-12 10:56:52,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54924 conditions, 8070 events. 4619/8070 cut-off events. For 989821/989841 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 60932 event pairs, 1325 based on Foata normal form. 6/7703 useless extension candidates. Maximal degree in co-relation 54719. Up to 6655 conditions per place. [2024-05-12 10:56:52,904 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 391 selfloop transitions, 187 changer transitions 0/594 dead transitions. [2024-05-12 10:56:52,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 594 transitions, 10227 flow [2024-05-12 10:56:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:56:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:56:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 307 transitions. [2024-05-12 10:56:52,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5695732838589982 [2024-05-12 10:56:52,905 INFO L175 Difference]: Start difference. First operand has 513 places, 565 transitions, 8401 flow. Second operand 11 states and 307 transitions. [2024-05-12 10:56:52,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 594 transitions, 10227 flow [2024-05-12 10:57:00,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 594 transitions, 9861 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-05-12 10:57:00,812 INFO L231 Difference]: Finished difference. Result has 516 places, 565 transitions, 8415 flow [2024-05-12 10:57:00,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=8035, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8415, PETRI_PLACES=516, PETRI_TRANSITIONS=565} [2024-05-12 10:57:00,813 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 463 predicate places. [2024-05-12 10:57:00,813 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 565 transitions, 8415 flow [2024-05-12 10:57:00,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:00,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:57:00,813 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] [2024-05-12 10:57:00,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-05-12 10:57:00,813 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:57:00,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:57:00,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1117638001, now seen corresponding path program 15 times [2024-05-12 10:57:00,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:57:00,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301061157] [2024-05-12 10:57:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:57:00,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:57:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:57:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:57:01,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:57:01,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301061157] [2024-05-12 10:57:01,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301061157] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:57:01,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:57:01,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:57:01,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537306270] [2024-05-12 10:57:01,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:57:01,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:57:01,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:57:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:57:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:57:01,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:57:01,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 565 transitions, 8415 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:01,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:57:01,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:57:01,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:57:03,041 INFO L124 PetriNetUnfolderBase]: 4616/8067 cut-off events. [2024-05-12 10:57:03,041 INFO L125 PetriNetUnfolderBase]: For 990300/990318 co-relation queries the response was YES. [2024-05-12 10:57:03,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54791 conditions, 8067 events. 4616/8067 cut-off events. For 990300/990318 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 60938 event pairs, 1313 based on Foata normal form. 7/7704 useless extension candidates. Maximal degree in co-relation 54585. Up to 6917 conditions per place. [2024-05-12 10:57:03,167 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 533 selfloop transitions, 31 changer transitions 0/580 dead transitions. [2024-05-12 10:57:03,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 580 transitions, 9579 flow [2024-05-12 10:57:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:57:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:57:03,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 10:57:03,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-05-12 10:57:03,168 INFO L175 Difference]: Start difference. First operand has 516 places, 565 transitions, 8415 flow. Second operand 8 states and 216 transitions. [2024-05-12 10:57:03,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 580 transitions, 9579 flow [2024-05-12 10:57:09,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 580 transitions, 9185 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-05-12 10:57:09,544 INFO L231 Difference]: Finished difference. Result has 514 places, 565 transitions, 8089 flow [2024-05-12 10:57:09,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=8021, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8089, PETRI_PLACES=514, PETRI_TRANSITIONS=565} [2024-05-12 10:57:09,544 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 461 predicate places. [2024-05-12 10:57:09,544 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 565 transitions, 8089 flow [2024-05-12 10:57:09,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:09,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:57:09,545 INFO 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] [2024-05-12 10:57:09,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-05-12 10:57:09,545 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:57:09,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:57:09,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1338541569, now seen corresponding path program 24 times [2024-05-12 10:57:09,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:57:09,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187914114] [2024-05-12 10:57:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:57:09,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:57:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:57:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:57:09,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:57:09,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187914114] [2024-05-12 10:57:09,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187914114] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:57:09,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:57:09,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:57:09,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451201385] [2024-05-12 10:57:09,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:57:09,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:57:09,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:57:09,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:57:09,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:57:10,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:57:10,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 565 transitions, 8089 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:10,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:57:10,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:57:10,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:57:11,757 INFO L124 PetriNetUnfolderBase]: 4633/8085 cut-off events. [2024-05-12 10:57:11,758 INFO L125 PetriNetUnfolderBase]: For 1012642/1012673 co-relation queries the response was YES. [2024-05-12 10:57:11,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54780 conditions, 8085 events. 4633/8085 cut-off events. For 1012642/1012673 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 61103 event pairs, 1346 based on Foata normal form. 15/7720 useless extension candidates. Maximal degree in co-relation 54573. Up to 6592 conditions per place. [2024-05-12 10:57:11,892 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 355 selfloop transitions, 226 changer transitions 0/597 dead transitions. [2024-05-12 10:57:11,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 597 transitions, 10347 flow [2024-05-12 10:57:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:57:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:57:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 348 transitions. [2024-05-12 10:57:11,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463108320251178 [2024-05-12 10:57:11,894 INFO L175 Difference]: Start difference. First operand has 514 places, 565 transitions, 8089 flow. Second operand 13 states and 348 transitions. [2024-05-12 10:57:11,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 597 transitions, 10347 flow [2024-05-12 10:57:19,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 597 transitions, 10273 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 10:57:19,753 INFO L231 Difference]: Finished difference. Result has 520 places, 571 transitions, 8597 flow [2024-05-12 10:57:19,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=8015, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8597, PETRI_PLACES=520, PETRI_TRANSITIONS=571} [2024-05-12 10:57:19,754 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 467 predicate places. [2024-05-12 10:57:19,754 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 571 transitions, 8597 flow [2024-05-12 10:57:19,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:19,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:57:19,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:57:19,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-05-12 10:57:19,755 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:57:19,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:57:19,755 INFO L85 PathProgramCache]: Analyzing trace with hash -820909613, now seen corresponding path program 25 times [2024-05-12 10:57:19,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:57:19,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350059942] [2024-05-12 10:57:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:57:19,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:57:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:57:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:57:20,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:57:20,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350059942] [2024-05-12 10:57:20,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350059942] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:57:20,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:57:20,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:57:20,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279079715] [2024-05-12 10:57:20,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:57:20,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:57:20,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:57:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:57:20,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:57:20,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:57:20,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 571 transitions, 8597 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:20,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:57:20,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:57:20,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:57:22,069 INFO L124 PetriNetUnfolderBase]: 4630/8081 cut-off events. [2024-05-12 10:57:22,069 INFO L125 PetriNetUnfolderBase]: For 1016070/1016097 co-relation queries the response was YES. [2024-05-12 10:57:22,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55235 conditions, 8081 events. 4630/8081 cut-off events. For 1016070/1016097 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 61066 event pairs, 1346 based on Foata normal form. 12/7713 useless extension candidates. Maximal degree in co-relation 55027. Up to 6589 conditions per place. [2024-05-12 10:57:22,206 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 353 selfloop transitions, 225 changer transitions 0/594 dead transitions. [2024-05-12 10:57:22,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 594 transitions, 10419 flow [2024-05-12 10:57:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:57:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:57:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2024-05-12 10:57:22,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-05-12 10:57:22,208 INFO L175 Difference]: Start difference. First operand has 520 places, 571 transitions, 8597 flow. Second operand 11 states and 301 transitions. [2024-05-12 10:57:22,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 594 transitions, 10419 flow [2024-05-12 10:57:29,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 594 transitions, 9764 flow, removed 42 selfloop flow, removed 11 redundant places. [2024-05-12 10:57:29,940 INFO L231 Difference]: Finished difference. Result has 520 places, 571 transitions, 8398 flow [2024-05-12 10:57:29,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7942, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8398, PETRI_PLACES=520, PETRI_TRANSITIONS=571} [2024-05-12 10:57:29,941 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 467 predicate places. [2024-05-12 10:57:29,941 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 571 transitions, 8398 flow [2024-05-12 10:57:29,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:29,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:57:29,941 INFO 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] [2024-05-12 10:57:29,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-05-12 10:57:29,941 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:57:29,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:57:29,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1881257405, now seen corresponding path program 26 times [2024-05-12 10:57:29,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:57:29,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108277011] [2024-05-12 10:57:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:57:29,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:57:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:57:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:57:30,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:57:30,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108277011] [2024-05-12 10:57:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108277011] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:57:30,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:57:30,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:57:30,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278207899] [2024-05-12 10:57:30,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:57:30,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:57:30,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:57:30,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:57:30,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:57:30,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:57:30,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 571 transitions, 8398 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:30,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:57:30,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:57:30,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:57:32,228 INFO L124 PetriNetUnfolderBase]: 4627/8077 cut-off events. [2024-05-12 10:57:32,229 INFO L125 PetriNetUnfolderBase]: For 1013035/1013062 co-relation queries the response was YES. [2024-05-12 10:57:32,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54926 conditions, 8077 events. 4627/8077 cut-off events. For 1013035/1013062 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 61017 event pairs, 1346 based on Foata normal form. 12/7709 useless extension candidates. Maximal degree in co-relation 54717. Up to 6586 conditions per place. [2024-05-12 10:57:32,360 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 346 selfloop transitions, 232 changer transitions 0/594 dead transitions. [2024-05-12 10:57:32,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 594 transitions, 9916 flow [2024-05-12 10:57:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:57:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:57:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2024-05-12 10:57:32,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-05-12 10:57:32,362 INFO L175 Difference]: Start difference. First operand has 520 places, 571 transitions, 8398 flow. Second operand 12 states and 320 transitions. [2024-05-12 10:57:32,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 594 transitions, 9916 flow [2024-05-12 10:57:40,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 594 transitions, 9440 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-05-12 10:57:40,265 INFO L231 Difference]: Finished difference. Result has 522 places, 571 transitions, 8392 flow [2024-05-12 10:57:40,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7922, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8392, PETRI_PLACES=522, PETRI_TRANSITIONS=571} [2024-05-12 10:57:40,266 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 469 predicate places. [2024-05-12 10:57:40,266 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 571 transitions, 8392 flow [2024-05-12 10:57:40,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:40,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:57:40,266 INFO 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] [2024-05-12 10:57:40,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-05-12 10:57:40,266 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:57:40,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:57:40,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1545996515, now seen corresponding path program 27 times [2024-05-12 10:57:40,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:57:40,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367050778] [2024-05-12 10:57:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:57:40,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:57:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:57:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:57:40,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:57:40,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367050778] [2024-05-12 10:57:40,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367050778] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:57:40,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:57:40,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:57:40,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992887272] [2024-05-12 10:57:40,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:57:40,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:57:40,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:57:40,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:57:40,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:57:40,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:57:40,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 571 transitions, 8392 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:40,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:57:40,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:57:40,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:57:42,573 INFO L124 PetriNetUnfolderBase]: 4634/8088 cut-off events. [2024-05-12 10:57:42,573 INFO L125 PetriNetUnfolderBase]: For 1024981/1025008 co-relation queries the response was YES. [2024-05-12 10:57:42,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55081 conditions, 8088 events. 4634/8088 cut-off events. For 1024981/1025008 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 61255 event pairs, 1346 based on Foata normal form. 12/7718 useless extension candidates. Maximal degree in co-relation 54871. Up to 6594 conditions per place. [2024-05-12 10:57:42,727 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 353 selfloop transitions, 229 changer transitions 0/598 dead transitions. [2024-05-12 10:57:42,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 598 transitions, 10296 flow [2024-05-12 10:57:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:57:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:57:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 326 transitions. [2024-05-12 10:57:42,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-05-12 10:57:42,728 INFO L175 Difference]: Start difference. First operand has 522 places, 571 transitions, 8392 flow. Second operand 12 states and 326 transitions. [2024-05-12 10:57:42,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 598 transitions, 10296 flow [2024-05-12 10:57:50,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 598 transitions, 9830 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-05-12 10:57:50,666 INFO L231 Difference]: Finished difference. Result has 524 places, 574 transitions, 8454 flow [2024-05-12 10:57:50,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7935, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8454, PETRI_PLACES=524, PETRI_TRANSITIONS=574} [2024-05-12 10:57:50,667 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 471 predicate places. [2024-05-12 10:57:50,667 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 574 transitions, 8454 flow [2024-05-12 10:57:50,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:50,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:57:50,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:57:50,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-05-12 10:57:50,667 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:57:50,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:57:50,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1539330275, now seen corresponding path program 28 times [2024-05-12 10:57:50,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:57:50,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634328716] [2024-05-12 10:57:50,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:57:50,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:57:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:57:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:57:51,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:57:51,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634328716] [2024-05-12 10:57:51,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634328716] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:57:51,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:57:51,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:57:51,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153774951] [2024-05-12 10:57:51,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:57:51,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:57:51,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:57:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:57:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:57:51,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:57:51,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 574 transitions, 8454 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:51,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:57:51,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:57:51,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:57:52,959 INFO L124 PetriNetUnfolderBase]: 4631/8084 cut-off events. [2024-05-12 10:57:52,960 INFO L125 PetriNetUnfolderBase]: For 1025085/1025112 co-relation queries the response was YES. [2024-05-12 10:57:53,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54948 conditions, 8084 events. 4631/8084 cut-off events. For 1025085/1025112 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 61084 event pairs, 1346 based on Foata normal form. 12/7714 useless extension candidates. Maximal degree in co-relation 54737. Up to 6591 conditions per place. [2024-05-12 10:57:53,097 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 351 selfloop transitions, 231 changer transitions 0/598 dead transitions. [2024-05-12 10:57:53,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 598 transitions, 9986 flow [2024-05-12 10:57:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:57:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:57:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 345 transitions. [2024-05-12 10:57:53,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416012558869702 [2024-05-12 10:57:53,098 INFO L175 Difference]: Start difference. First operand has 524 places, 574 transitions, 8454 flow. Second operand 13 states and 345 transitions. [2024-05-12 10:57:53,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 598 transitions, 9986 flow [2024-05-12 10:58:01,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 598 transitions, 9312 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-05-12 10:58:01,055 INFO L231 Difference]: Finished difference. Result has 525 places, 574 transitions, 8248 flow [2024-05-12 10:58:01,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7780, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8248, PETRI_PLACES=525, PETRI_TRANSITIONS=574} [2024-05-12 10:58:01,055 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 472 predicate places. [2024-05-12 10:58:01,055 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 574 transitions, 8248 flow [2024-05-12 10:58:01,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:01,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:58:01,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:58:01,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-05-12 10:58:01,056 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:58:01,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:58:01,056 INFO L85 PathProgramCache]: Analyzing trace with hash -657602305, now seen corresponding path program 29 times [2024-05-12 10:58:01,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:58:01,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783082756] [2024-05-12 10:58:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:58:01,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:58:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:58:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:58:01,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:58:01,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783082756] [2024-05-12 10:58:01,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783082756] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:58:01,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:58:01,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:58:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865090540] [2024-05-12 10:58:01,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:58:01,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:58:01,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:58:01,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:58:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:58:01,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:58:01,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 574 transitions, 8248 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:01,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:58:01,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:58:01,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:58:03,345 INFO L124 PetriNetUnfolderBase]: 4628/8080 cut-off events. [2024-05-12 10:58:03,346 INFO L125 PetriNetUnfolderBase]: For 1021442/1021460 co-relation queries the response was YES. [2024-05-12 10:58:03,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54678 conditions, 8080 events. 4628/8080 cut-off events. For 1021442/1021460 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 61078 event pairs, 1325 based on Foata normal form. 7/7707 useless extension candidates. Maximal degree in co-relation 54466. Up to 6909 conditions per place. [2024-05-12 10:58:03,479 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 536 selfloop transitions, 33 changer transitions 0/585 dead transitions. [2024-05-12 10:58:03,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 585 transitions, 9412 flow [2024-05-12 10:58:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:58:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:58:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 10:58:03,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626822157434402 [2024-05-12 10:58:03,480 INFO L175 Difference]: Start difference. First operand has 525 places, 574 transitions, 8248 flow. Second operand 7 states and 193 transitions. [2024-05-12 10:58:03,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 585 transitions, 9412 flow [2024-05-12 10:58:10,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 585 transitions, 8902 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-05-12 10:58:10,335 INFO L231 Difference]: Finished difference. Result has 520 places, 574 transitions, 7814 flow [2024-05-12 10:58:10,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7738, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7814, PETRI_PLACES=520, PETRI_TRANSITIONS=574} [2024-05-12 10:58:10,336 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 467 predicate places. [2024-05-12 10:58:10,336 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 574 transitions, 7814 flow [2024-05-12 10:58:10,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:10,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:58:10,337 INFO 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] [2024-05-12 10:58:10,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-05-12 10:58:10,337 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:58:10,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:58:10,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1674388701, now seen corresponding path program 16 times [2024-05-12 10:58:10,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:58:10,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457382634] [2024-05-12 10:58:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:58:10,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:58:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:58:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:58:10,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:58:10,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457382634] [2024-05-12 10:58:10,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457382634] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:58:10,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:58:10,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:58:10,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068425483] [2024-05-12 10:58:10,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:58:10,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:58:10,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:58:10,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:58:10,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:58:10,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:58:10,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 574 transitions, 7814 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:10,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:58:10,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:58:10,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:58:12,576 INFO L124 PetriNetUnfolderBase]: 4635/8096 cut-off events. [2024-05-12 10:58:12,576 INFO L125 PetriNetUnfolderBase]: For 1030628/1030640 co-relation queries the response was YES. [2024-05-12 10:58:12,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54248 conditions, 8096 events. 4635/8096 cut-off events. For 1030628/1030640 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 61149 event pairs, 1315 based on Foata normal form. 1/7716 useless extension candidates. Maximal degree in co-relation 54035. Up to 6941 conditions per place. [2024-05-12 10:58:12,711 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 542 selfloop transitions, 31 changer transitions 0/589 dead transitions. [2024-05-12 10:58:12,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 589 transitions, 9052 flow [2024-05-12 10:58:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:58:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:58:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 10:58:12,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433673469387755 [2024-05-12 10:58:12,713 INFO L175 Difference]: Start difference. First operand has 520 places, 574 transitions, 7814 flow. Second operand 8 states and 213 transitions. [2024-05-12 10:58:12,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 589 transitions, 9052 flow [2024-05-12 10:58:19,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 589 transitions, 8988 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 10:58:19,630 INFO L231 Difference]: Finished difference. Result has 522 places, 577 transitions, 7888 flow [2024-05-12 10:58:19,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7750, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7888, PETRI_PLACES=522, PETRI_TRANSITIONS=577} [2024-05-12 10:58:19,631 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 469 predicate places. [2024-05-12 10:58:19,631 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 577 transitions, 7888 flow [2024-05-12 10:58:19,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:19,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:58:19,631 INFO 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] [2024-05-12 10:58:19,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-05-12 10:58:19,632 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:58:19,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:58:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash 191838781, now seen corresponding path program 17 times [2024-05-12 10:58:19,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:58:19,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687787101] [2024-05-12 10:58:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:58:19,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:58:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:58:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:58:20,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:58:20,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687787101] [2024-05-12 10:58:20,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687787101] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:58:20,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:58:20,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:58:20,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830873820] [2024-05-12 10:58:20,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:58:20,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:58:20,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:58:20,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:58:20,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:58:20,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:58:20,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 577 transitions, 7888 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:20,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:58:20,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:58:20,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:58:21,930 INFO L124 PetriNetUnfolderBase]: 4652/8119 cut-off events. [2024-05-12 10:58:21,930 INFO L125 PetriNetUnfolderBase]: For 1044591/1044603 co-relation queries the response was YES. [2024-05-12 10:58:22,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54627 conditions, 8119 events. 4652/8119 cut-off events. For 1044591/1044603 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 61318 event pairs, 1330 based on Foata normal form. 1/7730 useless extension candidates. Maximal degree in co-relation 54414. Up to 6694 conditions per place. [2024-05-12 10:58:22,089 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 395 selfloop transitions, 198 changer transitions 0/609 dead transitions. [2024-05-12 10:58:22,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 609 transitions, 10222 flow [2024-05-12 10:58:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:58:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:58:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 346 transitions. [2024-05-12 10:58:22,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543171114599686 [2024-05-12 10:58:22,090 INFO L175 Difference]: Start difference. First operand has 522 places, 577 transitions, 7888 flow. Second operand 13 states and 346 transitions. [2024-05-12 10:58:22,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 609 transitions, 10222 flow [2024-05-12 10:58:30,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 609 transitions, 10132 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-05-12 10:58:30,533 INFO L231 Difference]: Finished difference. Result has 529 places, 583 transitions, 8340 flow [2024-05-12 10:58:30,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7798, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8340, PETRI_PLACES=529, PETRI_TRANSITIONS=583} [2024-05-12 10:58:30,534 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 476 predicate places. [2024-05-12 10:58:30,534 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 583 transitions, 8340 flow [2024-05-12 10:58:30,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:30,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:58:30,534 INFO 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] [2024-05-12 10:58:30,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-05-12 10:58:30,535 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:58:30,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:58:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash -820902669, now seen corresponding path program 18 times [2024-05-12 10:58:30,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:58:30,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120133168] [2024-05-12 10:58:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:58:30,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:58:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:58:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:58:30,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:58:30,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120133168] [2024-05-12 10:58:30,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120133168] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:58:30,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:58:30,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:58:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748214266] [2024-05-12 10:58:30,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:58:30,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:58:30,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:58:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:58:30,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:58:30,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:58:30,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 583 transitions, 8340 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:30,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:58:30,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:58:30,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:58:32,764 INFO L124 PetriNetUnfolderBase]: 4649/8115 cut-off events. [2024-05-12 10:58:32,764 INFO L125 PetriNetUnfolderBase]: For 1046206/1046218 co-relation queries the response was YES. [2024-05-12 10:58:32,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54933 conditions, 8115 events. 4649/8115 cut-off events. For 1046206/1046218 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 61336 event pairs, 1330 based on Foata normal form. 1/7726 useless extension candidates. Maximal degree in co-relation 54719. Up to 6691 conditions per place. [2024-05-12 10:58:32,921 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 393 selfloop transitions, 197 changer transitions 0/606 dead transitions. [2024-05-12 10:58:32,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 606 transitions, 10210 flow [2024-05-12 10:58:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:58:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:58:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 299 transitions. [2024-05-12 10:58:32,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547309833024119 [2024-05-12 10:58:32,923 INFO L175 Difference]: Start difference. First operand has 529 places, 583 transitions, 8340 flow. Second operand 11 states and 299 transitions. [2024-05-12 10:58:32,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 606 transitions, 10210 flow [2024-05-12 10:58:40,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 606 transitions, 9670 flow, removed 42 selfloop flow, removed 11 redundant places. [2024-05-12 10:58:40,724 INFO L231 Difference]: Finished difference. Result has 529 places, 583 transitions, 8200 flow [2024-05-12 10:58:40,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7800, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8200, PETRI_PLACES=529, PETRI_TRANSITIONS=583} [2024-05-12 10:58:40,724 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 476 predicate places. [2024-05-12 10:58:40,724 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 583 transitions, 8200 flow [2024-05-12 10:58:40,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:40,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:58:40,725 INFO 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] [2024-05-12 10:58:40,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-05-12 10:58:40,725 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:58:40,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:58:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1533102561, now seen corresponding path program 19 times [2024-05-12 10:58:40,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:58:40,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443211758] [2024-05-12 10:58:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:58:40,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:58:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:58:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:58:41,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:58:41,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443211758] [2024-05-12 10:58:41,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443211758] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:58:41,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:58:41,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:58:41,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599923030] [2024-05-12 10:58:41,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:58:41,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:58:41,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:58:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:58:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:58:41,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:58:41,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 583 transitions, 8200 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:41,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:58:41,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:58:41,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:58:42,907 INFO L124 PetriNetUnfolderBase]: 4656/8126 cut-off events. [2024-05-12 10:58:42,907 INFO L125 PetriNetUnfolderBase]: For 1056592/1056604 co-relation queries the response was YES. [2024-05-12 10:58:43,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54933 conditions, 8126 events. 4656/8126 cut-off events. For 1056592/1056604 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 61350 event pairs, 1330 based on Foata normal form. 1/7735 useless extension candidates. Maximal degree in co-relation 54718. Up to 6699 conditions per place. [2024-05-12 10:58:43,040 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 397 selfloop transitions, 198 changer transitions 0/611 dead transitions. [2024-05-12 10:58:43,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 611 transitions, 10471 flow [2024-05-12 10:58:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:58:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:58:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 325 transitions. [2024-05-12 10:58:43,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527210884353742 [2024-05-12 10:58:43,042 INFO L175 Difference]: Start difference. First operand has 529 places, 583 transitions, 8200 flow. Second operand 12 states and 325 transitions. [2024-05-12 10:58:43,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 611 transitions, 10471 flow [2024-05-12 10:58:51,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 611 transitions, 10071 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-05-12 10:58:51,121 INFO L231 Difference]: Finished difference. Result has 531 places, 586 transitions, 8265 flow [2024-05-12 10:58:51,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8265, PETRI_PLACES=531, PETRI_TRANSITIONS=586} [2024-05-12 10:58:51,122 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 478 predicate places. [2024-05-12 10:58:51,122 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 586 transitions, 8265 flow [2024-05-12 10:58:51,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:51,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:58:51,122 INFO 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] [2024-05-12 10:58:51,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-05-12 10:58:51,122 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:58:51,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:58:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1545601761, now seen corresponding path program 20 times [2024-05-12 10:58:51,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:58:51,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085090033] [2024-05-12 10:58:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:58:51,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:58:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:58:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:58:51,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:58:51,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085090033] [2024-05-12 10:58:51,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085090033] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:58:51,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:58:51,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:58:51,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570392686] [2024-05-12 10:58:51,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:58:51,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:58:51,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:58:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:58:51,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:58:51,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:58:51,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 586 transitions, 8265 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:58:51,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:58:51,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:58:51,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:58:53,293 INFO L124 PetriNetUnfolderBase]: 4673/8152 cut-off events. [2024-05-12 10:58:53,293 INFO L125 PetriNetUnfolderBase]: For 1082457/1082469 co-relation queries the response was YES. [2024-05-12 10:58:53,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55370 conditions, 8152 events. 4673/8152 cut-off events. For 1082457/1082469 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 61530 event pairs, 1330 based on Foata normal form. 1/7757 useless extension candidates. Maximal degree in co-relation 55154. Up to 6718 conditions per place. [2024-05-12 10:58:53,428 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 396 selfloop transitions, 206 changer transitions 0/618 dead transitions. [2024-05-12 10:58:53,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 618 transitions, 10622 flow [2024-05-12 10:58:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:58:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:58:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 347 transitions. [2024-05-12 10:58:53,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447409733124019 [2024-05-12 10:58:53,430 INFO L175 Difference]: Start difference. First operand has 531 places, 586 transitions, 8265 flow. Second operand 13 states and 347 transitions. [2024-05-12 10:58:53,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 618 transitions, 10622 flow [2024-05-12 10:59:01,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 618 transitions, 9977 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-05-12 10:59:01,047 INFO L231 Difference]: Finished difference. Result has 532 places, 592 transitions, 8165 flow [2024-05-12 10:59:01,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8165, PETRI_PLACES=532, PETRI_TRANSITIONS=592} [2024-05-12 10:59:01,048 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 479 predicate places. [2024-05-12 10:59:01,048 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 592 transitions, 8165 flow [2024-05-12 10:59:01,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:01,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:59:01,048 INFO 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] [2024-05-12 10:59:01,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-05-12 10:59:01,049 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:59:01,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:59:01,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1384027295, now seen corresponding path program 21 times [2024-05-12 10:59:01,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:59:01,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323855894] [2024-05-12 10:59:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:59:01,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:59:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:59:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:59:01,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:59:01,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323855894] [2024-05-12 10:59:01,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323855894] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:59:01,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:59:01,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:59:01,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350121937] [2024-05-12 10:59:01,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:59:01,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:59:01,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:59:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:59:01,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:59:01,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:59:01,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 592 transitions, 8165 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:01,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:59:01,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:59:01,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:59:03,518 INFO L124 PetriNetUnfolderBase]: 4690/8178 cut-off events. [2024-05-12 10:59:03,519 INFO L125 PetriNetUnfolderBase]: For 1105339/1105351 co-relation queries the response was YES. [2024-05-12 10:59:03,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55656 conditions, 8178 events. 4690/8178 cut-off events. For 1105339/1105351 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61738 event pairs, 1330 based on Foata normal form. 1/7779 useless extension candidates. Maximal degree in co-relation 55439. Up to 6737 conditions per place. [2024-05-12 10:59:03,694 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 394 selfloop transitions, 214 changer transitions 0/624 dead transitions. [2024-05-12 10:59:03,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 624 transitions, 10522 flow [2024-05-12 10:59:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:59:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:59:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 347 transitions. [2024-05-12 10:59:03,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447409733124019 [2024-05-12 10:59:03,695 INFO L175 Difference]: Start difference. First operand has 532 places, 592 transitions, 8165 flow. Second operand 13 states and 347 transitions. [2024-05-12 10:59:03,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 624 transitions, 10522 flow [2024-05-12 10:59:12,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 624 transitions, 10108 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-05-12 10:59:12,105 INFO L231 Difference]: Finished difference. Result has 534 places, 598 transitions, 8294 flow [2024-05-12 10:59:12,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7757, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8294, PETRI_PLACES=534, PETRI_TRANSITIONS=598} [2024-05-12 10:59:12,105 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 481 predicate places. [2024-05-12 10:59:12,106 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 598 transitions, 8294 flow [2024-05-12 10:59:12,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:12,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:59:12,106 INFO 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] [2024-05-12 10:59:12,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-05-12 10:59:12,106 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:59:12,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:59:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1890737603, now seen corresponding path program 22 times [2024-05-12 10:59:12,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:59:12,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500922214] [2024-05-12 10:59:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:59:12,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:59:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:59:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:59:12,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:59:12,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500922214] [2024-05-12 10:59:12,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500922214] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:59:12,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:59:12,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:59:12,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012292539] [2024-05-12 10:59:12,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:59:12,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:59:12,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:59:12,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:59:12,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:59:12,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:59:12,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 598 transitions, 8294 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:12,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:59:12,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:59:12,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:59:14,596 INFO L124 PetriNetUnfolderBase]: 4687/8172 cut-off events. [2024-05-12 10:59:14,597 INFO L125 PetriNetUnfolderBase]: For 1104684/1104702 co-relation queries the response was YES. [2024-05-12 10:59:14,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55503 conditions, 8172 events. 4687/8172 cut-off events. For 1104684/1104702 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61803 event pairs, 1325 based on Foata normal form. 7/7783 useless extension candidates. Maximal degree in co-relation 55285. Up to 6966 conditions per place. [2024-05-12 10:59:14,753 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 551 selfloop transitions, 42 changer transitions 0/609 dead transitions. [2024-05-12 10:59:14,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 609 transitions, 9506 flow [2024-05-12 10:59:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:59:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:59:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:59:14,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685131195335277 [2024-05-12 10:59:14,754 INFO L175 Difference]: Start difference. First operand has 534 places, 598 transitions, 8294 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:59:14,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 609 transitions, 9506 flow [2024-05-12 10:59:24,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 609 transitions, 9105 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-05-12 10:59:24,074 INFO L231 Difference]: Finished difference. Result has 533 places, 598 transitions, 7987 flow [2024-05-12 10:59:24,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7893, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7987, PETRI_PLACES=533, PETRI_TRANSITIONS=598} [2024-05-12 10:59:24,075 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 480 predicate places. [2024-05-12 10:59:24,075 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 598 transitions, 7987 flow [2024-05-12 10:59:24,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:24,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:59:24,076 INFO 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] [2024-05-12 10:59:24,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-05-12 10:59:24,076 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:59:24,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:59:24,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1826919875, now seen corresponding path program 23 times [2024-05-12 10:59:24,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:59:24,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416878105] [2024-05-12 10:59:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:59:24,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:59:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:59:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:59:24,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:59:24,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416878105] [2024-05-12 10:59:24,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416878105] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:59:24,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:59:24,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:59:24,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376382419] [2024-05-12 10:59:24,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:59:24,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:59:24,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:59:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:59:24,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:59:24,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:59:24,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 598 transitions, 7987 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:24,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:59:24,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:59:24,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:59:26,522 INFO L124 PetriNetUnfolderBase]: 4684/8168 cut-off events. [2024-05-12 10:59:26,522 INFO L125 PetriNetUnfolderBase]: For 1102004/1102022 co-relation queries the response was YES. [2024-05-12 10:59:26,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54914 conditions, 8168 events. 4684/8168 cut-off events. For 1102004/1102022 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61640 event pairs, 1325 based on Foata normal form. 7/7779 useless extension candidates. Maximal degree in co-relation 54695. Up to 6943 conditions per place. [2024-05-12 10:59:26,685 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 536 selfloop transitions, 58 changer transitions 0/610 dead transitions. [2024-05-12 10:59:26,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 610 transitions, 9531 flow [2024-05-12 10:59:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:59:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:59:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:59:26,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5743440233236151 [2024-05-12 10:59:26,686 INFO L175 Difference]: Start difference. First operand has 533 places, 598 transitions, 7987 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:59:26,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 610 transitions, 9531 flow [2024-05-12 10:59:35,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 610 transitions, 9421 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-05-12 10:59:35,361 INFO L231 Difference]: Finished difference. Result has 533 places, 598 transitions, 8005 flow [2024-05-12 10:59:35,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7879, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8005, PETRI_PLACES=533, PETRI_TRANSITIONS=598} [2024-05-12 10:59:35,361 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 480 predicate places. [2024-05-12 10:59:35,361 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 598 transitions, 8005 flow [2024-05-12 10:59:35,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:35,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:59:35,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:59:35,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-05-12 10:59:35,362 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:59:35,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:59:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash -398538179, now seen corresponding path program 24 times [2024-05-12 10:59:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:59:35,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994831640] [2024-05-12 10:59:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:59:35,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:59:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:59:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:59:35,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:59:35,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994831640] [2024-05-12 10:59:35,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994831640] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:59:35,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:59:35,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:59:35,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728575503] [2024-05-12 10:59:35,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:59:35,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:59:35,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:59:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:59:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:59:35,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:59:35,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 598 transitions, 8005 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:35,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:59:35,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:59:35,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:59:37,746 INFO L124 PetriNetUnfolderBase]: 4681/8169 cut-off events. [2024-05-12 10:59:37,747 INFO L125 PetriNetUnfolderBase]: For 1088206/1088218 co-relation queries the response was YES. [2024-05-12 10:59:37,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54752 conditions, 8169 events. 4681/8169 cut-off events. For 1088206/1088218 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 61750 event pairs, 1315 based on Foata normal form. 1/7775 useless extension candidates. Maximal degree in co-relation 54533. Up to 6971 conditions per place. [2024-05-12 10:59:37,952 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 542 selfloop transitions, 54 changer transitions 0/612 dead transitions. [2024-05-12 10:59:37,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 612 transitions, 9885 flow [2024-05-12 10:59:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:59:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:59:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-05-12 10:59:37,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-05-12 10:59:37,969 INFO L175 Difference]: Start difference. First operand has 533 places, 598 transitions, 8005 flow. Second operand 8 states and 217 transitions. [2024-05-12 10:59:37,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 612 transitions, 9885 flow [2024-05-12 10:59:45,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 612 transitions, 9771 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 10:59:45,049 INFO L231 Difference]: Finished difference. Result has 536 places, 598 transitions, 8009 flow [2024-05-12 10:59:45,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7895, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8009, PETRI_PLACES=536, PETRI_TRANSITIONS=598} [2024-05-12 10:59:45,050 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 483 predicate places. [2024-05-12 10:59:45,050 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 598 transitions, 8009 flow [2024-05-12 10:59:45,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:45,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:59:45,050 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] [2024-05-12 10:59:45,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-05-12 10:59:45,050 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:59:45,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:59:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1712751165, now seen corresponding path program 25 times [2024-05-12 10:59:45,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:59:45,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651114140] [2024-05-12 10:59:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:59:45,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:59:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:59:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:59:45,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:59:45,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651114140] [2024-05-12 10:59:45,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651114140] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:59:45,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:59:45,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:59:45,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767946261] [2024-05-12 10:59:45,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:59:45,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:59:45,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:59:45,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:59:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:59:45,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:59:45,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 598 transitions, 8009 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:45,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:59:45,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:59:45,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:59:47,516 INFO L124 PetriNetUnfolderBase]: 4678/8165 cut-off events. [2024-05-12 10:59:47,517 INFO L125 PetriNetUnfolderBase]: For 1074749/1074761 co-relation queries the response was YES. [2024-05-12 10:59:47,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54534 conditions, 8165 events. 4678/8165 cut-off events. For 1074749/1074761 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 61692 event pairs, 1315 based on Foata normal form. 1/7771 useless extension candidates. Maximal degree in co-relation 54315. Up to 6968 conditions per place. [2024-05-12 10:59:47,693 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 542 selfloop transitions, 55 changer transitions 0/613 dead transitions. [2024-05-12 10:59:47,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 613 transitions, 9565 flow [2024-05-12 10:59:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:59:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:59:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-05-12 10:59:47,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2024-05-12 10:59:47,695 INFO L175 Difference]: Start difference. First operand has 536 places, 598 transitions, 8009 flow. Second operand 10 states and 262 transitions. [2024-05-12 10:59:47,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 613 transitions, 9565 flow [2024-05-12 10:59:55,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 613 transitions, 9409 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-05-12 10:59:55,008 INFO L231 Difference]: Finished difference. Result has 540 places, 598 transitions, 7969 flow [2024-05-12 10:59:55,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7853, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7969, PETRI_PLACES=540, PETRI_TRANSITIONS=598} [2024-05-12 10:59:55,008 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 487 predicate places. [2024-05-12 10:59:55,008 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 598 transitions, 7969 flow [2024-05-12 10:59:55,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:55,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:59:55,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:59:55,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-05-12 10:59:55,009 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:59:55,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:59:55,009 INFO L85 PathProgramCache]: Analyzing trace with hash -403299779, now seen corresponding path program 26 times [2024-05-12 10:59:55,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:59:55,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370668723] [2024-05-12 10:59:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:59:55,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:59:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:59:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:59:55,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:59:55,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370668723] [2024-05-12 10:59:55,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370668723] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:59:55,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:59:55,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:59:55,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432158788] [2024-05-12 10:59:55,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:59:55,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:59:55,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:59:55,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:59:55,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:59:55,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 10:59:55,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 598 transitions, 7969 flow. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:59:55,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:59:55,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 10:59:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:59:57,383 INFO L124 PetriNetUnfolderBase]: 4675/8162 cut-off events. [2024-05-12 10:59:57,383 INFO L125 PetriNetUnfolderBase]: For 1072779/1072791 co-relation queries the response was YES. [2024-05-12 10:59:57,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54360 conditions, 8162 events. 4675/8162 cut-off events. For 1072779/1072791 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 61666 event pairs, 1311 based on Foata normal form. 1/7770 useless extension candidates. Maximal degree in co-relation 54140. Up to 7010 conditions per place. [2024-05-12 10:59:57,543 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 572 selfloop transitions, 21 changer transitions 0/609 dead transitions. [2024-05-12 10:59:57,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 609 transitions, 9181 flow [2024-05-12 10:59:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:59:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:59:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 10:59:57,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481049562682215 [2024-05-12 10:59:57,545 INFO L175 Difference]: Start difference. First operand has 540 places, 598 transitions, 7969 flow. Second operand 7 states and 188 transitions. [2024-05-12 10:59:57,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 609 transitions, 9181 flow [2024-05-12 11:00:05,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 609 transitions, 8952 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-05-12 11:00:05,061 INFO L231 Difference]: Finished difference. Result has 536 places, 598 transitions, 7792 flow [2024-05-12 11:00:05,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7740, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7792, PETRI_PLACES=536, PETRI_TRANSITIONS=598} [2024-05-12 11:00:05,061 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 483 predicate places. [2024-05-12 11:00:05,061 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 598 transitions, 7792 flow [2024-05-12 11:00:05,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 9 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:05,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:00:05,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:00:05,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-05-12 11:00:05,062 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:00:05,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:00:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1829779811, now seen corresponding path program 3 times [2024-05-12 11:00:05,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:00:05,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575398425] [2024-05-12 11:00:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:00:05,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:00:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:00:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:00:05,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:00:05,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575398425] [2024-05-12 11:00:05,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575398425] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:00:05,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:00:05,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:00:05,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765423671] [2024-05-12 11:00:05,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:00:05,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:00:05,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:00:05,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:00:05,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:00:05,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 11:00:05,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 598 transitions, 7792 flow. Second operand has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:05,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:00:05,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 11:00:05,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:00:07,464 INFO L124 PetriNetUnfolderBase]: 4662/8138 cut-off events. [2024-05-12 11:00:07,464 INFO L125 PetriNetUnfolderBase]: For 1069123/1069141 co-relation queries the response was YES. [2024-05-12 11:00:07,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52923 conditions, 8138 events. 4662/8138 cut-off events. For 1069123/1069141 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61539 event pairs, 1284 based on Foata normal form. 12/7757 useless extension candidates. Maximal degree in co-relation 52703. Up to 6652 conditions per place. [2024-05-12 11:00:07,643 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 566 selfloop transitions, 39 changer transitions 0/621 dead transitions. [2024-05-12 11:00:07,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 621 transitions, 9132 flow [2024-05-12 11:00:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 11:00:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 11:00:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 11:00:07,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889212827988338 [2024-05-12 11:00:07,644 INFO L175 Difference]: Start difference. First operand has 536 places, 598 transitions, 7792 flow. Second operand 7 states and 202 transitions. [2024-05-12 11:00:07,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 621 transitions, 9132 flow [2024-05-12 11:00:15,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 621 transitions, 9084 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 11:00:15,183 INFO L231 Difference]: Finished difference. Result has 537 places, 598 transitions, 7826 flow [2024-05-12 11:00:15,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7744, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7826, PETRI_PLACES=537, PETRI_TRANSITIONS=598} [2024-05-12 11:00:15,184 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 484 predicate places. [2024-05-12 11:00:15,184 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 598 transitions, 7826 flow [2024-05-12 11:00:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.7) internal successors, (207), 10 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:15,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:00:15,184 INFO 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] [2024-05-12 11:00:15,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-05-12 11:00:15,185 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:00:15,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:00:15,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1364206077, now seen corresponding path program 5 times [2024-05-12 11:00:15,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:00:15,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996470068] [2024-05-12 11:00:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:00:15,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:00:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:00:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:00:15,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:00:15,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996470068] [2024-05-12 11:00:15,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996470068] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:00:15,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:00:15,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 11:00:15,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985214983] [2024-05-12 11:00:15,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:00:15,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 11:00:15,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:00:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 11:00:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:00:15,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 11:00:15,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 598 transitions, 7826 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:15,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:00:15,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 11:00:15,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:00:17,552 INFO L124 PetriNetUnfolderBase]: 4709/8233 cut-off events. [2024-05-12 11:00:17,552 INFO L125 PetriNetUnfolderBase]: For 1047683/1047695 co-relation queries the response was YES. [2024-05-12 11:00:17,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54277 conditions, 8233 events. 4709/8233 cut-off events. For 1047683/1047695 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 62316 event pairs, 1297 based on Foata normal form. 2/7839 useless extension candidates. Maximal degree in co-relation 54057. Up to 6933 conditions per place. [2024-05-12 11:00:17,712 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 584 selfloop transitions, 34 changer transitions 0/634 dead transitions. [2024-05-12 11:00:17,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 634 transitions, 9618 flow [2024-05-12 11:00:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:00:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:00:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-05-12 11:00:17,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5759637188208617 [2024-05-12 11:00:17,713 INFO L175 Difference]: Start difference. First operand has 537 places, 598 transitions, 7826 flow. Second operand 9 states and 254 transitions. [2024-05-12 11:00:17,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 634 transitions, 9618 flow [2024-05-12 11:00:25,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 634 transitions, 9504 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 11:00:25,170 INFO L231 Difference]: Finished difference. Result has 540 places, 602 transitions, 7929 flow [2024-05-12 11:00:25,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7712, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7929, PETRI_PLACES=540, PETRI_TRANSITIONS=602} [2024-05-12 11:00:25,171 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 487 predicate places. [2024-05-12 11:00:25,171 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 602 transitions, 7929 flow [2024-05-12 11:00:25,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:25,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:00:25,171 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, 1, 1] [2024-05-12 11:00:25,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-05-12 11:00:25,172 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:00:25,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:00:25,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1367063037, now seen corresponding path program 6 times [2024-05-12 11:00:25,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:00:25,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347090937] [2024-05-12 11:00:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:00:25,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:00:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:00:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:00:25,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:00:25,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347090937] [2024-05-12 11:00:25,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347090937] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:00:25,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:00:25,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 11:00:25,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432100373] [2024-05-12 11:00:25,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:00:25,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 11:00:25,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:00:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 11:00:25,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:00:25,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 11:00:25,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 602 transitions, 7929 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:25,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:00:25,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 11:00:25,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:00:27,443 INFO L124 PetriNetUnfolderBase]: 4704/8212 cut-off events. [2024-05-12 11:00:27,444 INFO L125 PetriNetUnfolderBase]: For 1031726/1031738 co-relation queries the response was YES. [2024-05-12 11:00:27,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53797 conditions, 8212 events. 4704/8212 cut-off events. For 1031726/1031738 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 62105 event pairs, 1315 based on Foata normal form. 2/7814 useless extension candidates. Maximal degree in co-relation 53576. Up to 6976 conditions per place. [2024-05-12 11:00:27,614 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 580 selfloop transitions, 30 changer transitions 0/626 dead transitions. [2024-05-12 11:00:27,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 626 transitions, 9211 flow [2024-05-12 11:00:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 11:00:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 11:00:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-05-12 11:00:27,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 11:00:27,615 INFO L175 Difference]: Start difference. First operand has 540 places, 602 transitions, 7929 flow. Second operand 8 states and 224 transitions. [2024-05-12 11:00:27,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 626 transitions, 9211 flow [2024-05-12 11:00:35,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 626 transitions, 9024 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-05-12 11:00:35,600 INFO L231 Difference]: Finished difference. Result has 542 places, 602 transitions, 7807 flow [2024-05-12 11:00:35,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7742, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7807, PETRI_PLACES=542, PETRI_TRANSITIONS=602} [2024-05-12 11:00:35,601 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 489 predicate places. [2024-05-12 11:00:35,601 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 602 transitions, 7807 flow [2024-05-12 11:00:35,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:35,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:00:35,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:00:35,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-05-12 11:00:35,602 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:00:35,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:00:35,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1367067997, now seen corresponding path program 7 times [2024-05-12 11:00:35,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:00:35,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745651850] [2024-05-12 11:00:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:00:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:00:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:00:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:00:35,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:00:35,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745651850] [2024-05-12 11:00:35,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745651850] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:00:35,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:00:35,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 11:00:35,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553765529] [2024-05-12 11:00:35,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:00:35,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 11:00:35,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:00:35,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 11:00:35,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:00:36,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 11:00:36,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 602 transitions, 7807 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:36,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:00:36,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 11:00:36,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:00:37,825 INFO L124 PetriNetUnfolderBase]: 4711/8223 cut-off events. [2024-05-12 11:00:37,825 INFO L125 PetriNetUnfolderBase]: For 1022029/1022041 co-relation queries the response was YES. [2024-05-12 11:00:37,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53216 conditions, 8223 events. 4711/8223 cut-off events. For 1022029/1022041 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 62217 event pairs, 1315 based on Foata normal form. 1/7822 useless extension candidates. Maximal degree in co-relation 52994. Up to 6996 conditions per place. [2024-05-12 11:00:37,979 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 579 selfloop transitions, 31 changer transitions 0/626 dead transitions. [2024-05-12 11:00:37,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 626 transitions, 9145 flow [2024-05-12 11:00:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 11:00:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 11:00:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-05-12 11:00:37,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663265306122449 [2024-05-12 11:00:37,981 INFO L175 Difference]: Start difference. First operand has 542 places, 602 transitions, 7807 flow. Second operand 8 states and 222 transitions. [2024-05-12 11:00:37,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 626 transitions, 9145 flow [2024-05-12 11:00:47,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 626 transitions, 9080 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-05-12 11:00:47,039 INFO L231 Difference]: Finished difference. Result has 543 places, 605 transitions, 7882 flow [2024-05-12 11:00:47,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7742, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7882, PETRI_PLACES=543, PETRI_TRANSITIONS=605} [2024-05-12 11:00:47,040 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 490 predicate places. [2024-05-12 11:00:47,040 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 605 transitions, 7882 flow [2024-05-12 11:00:47,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:47,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:00:47,040 INFO 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] [2024-05-12 11:00:47,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-05-12 11:00:47,041 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:00:47,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:00:47,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1647993341, now seen corresponding path program 7 times [2024-05-12 11:00:47,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:00:47,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372771930] [2024-05-12 11:00:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:00:47,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:00:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:00:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:00:47,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:00:47,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372771930] [2024-05-12 11:00:47,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372771930] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:00:47,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:00:47,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 11:00:47,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909482860] [2024-05-12 11:00:47,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:00:47,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 11:00:47,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:00:47,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 11:00:47,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:00:47,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 11:00:47,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 605 transitions, 7882 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:47,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:00:47,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 11:00:47,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:00:49,306 INFO L124 PetriNetUnfolderBase]: 4732/8266 cut-off events. [2024-05-12 11:00:49,306 INFO L125 PetriNetUnfolderBase]: For 1050510/1050522 co-relation queries the response was YES. [2024-05-12 11:00:49,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53694 conditions, 8266 events. 4732/8266 cut-off events. For 1050510/1050522 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 62642 event pairs, 1327 based on Foata normal form. 2/7862 useless extension candidates. Maximal degree in co-relation 53471. Up to 6941 conditions per place. [2024-05-12 11:00:49,465 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 522 selfloop transitions, 90 changer transitions 0/628 dead transitions. [2024-05-12 11:00:49,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 628 transitions, 9232 flow [2024-05-12 11:00:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 11:00:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 11:00:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 11:00:49,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5739795918367347 [2024-05-12 11:00:49,467 INFO L175 Difference]: Start difference. First operand has 543 places, 605 transitions, 7882 flow. Second operand 8 states and 225 transitions. [2024-05-12 11:00:49,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 628 transitions, 9232 flow Killed by 15