./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:59:31,583 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:59:31,646 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:59:31,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:59:31,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:59:31,674 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:59:31,675 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:59:31,675 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:59:31,676 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:59:31,679 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:59:31,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:59:31,679 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:59:31,680 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:59:31,681 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:59:31,681 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:59:31,681 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:59:31,681 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:59:31,682 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:59:31,682 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:59:31,682 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:59:31,682 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:59:31,683 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:59:31,683 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:59:31,683 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:59:31,683 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:59:31,683 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:59:31,684 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:59:31,684 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:59:31,684 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:59:31,684 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:59:31,685 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:59:31,685 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:59:31,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:59:31,686 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:59:31,686 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:59:31,686 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:59:31,686 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:59:31,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:59:31,687 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:59:31,687 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:59:31,687 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:59:31,687 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:59:31,687 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:59:31,688 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:59:31,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:59:31,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:59:31,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:59:31,941 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:59:31,942 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:59:31,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 17:59:33,019 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:59:33,200 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:59:33,200 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 17:59:33,210 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c2f7827/c9c92c47917d4a87a69b0d61a6f727d9/FLAG72aeb48bd [2024-06-20 17:59:33,220 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c2f7827/c9c92c47917d4a87a69b0d61a6f727d9 [2024-06-20 17:59:33,222 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:59:33,222 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:59:33,223 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-20 17:59:33,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:59:33,313 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:59:33,313 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:59:33,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:59:33,317 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:59:33,317 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:59:33" (1/2) ... [2024-06-20 17:59:33,318 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e564540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:59:33, skipping insertion in model container [2024-06-20 17:59:33,318 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:59:33" (1/2) ... [2024-06-20 17:59:33,319 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@396f4602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:59:33, skipping insertion in model container [2024-06-20 17:59:33,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:59:33" (2/2) ... [2024-06-20 17:59:33,319 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e564540 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33, skipping insertion in model container [2024-06-20 17:59:33,320 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:59:33" (2/2) ... [2024-06-20 17:59:33,320 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:59:33,364 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:59:33,365 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-20 17:59:33,365 INFO L97 edCorrectnessWitness]: Location invariant before [L797-L797] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-20 17:59:33,366 INFO L97 edCorrectnessWitness]: Location invariant before [L798-L798] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-20 17:59:33,366 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-20 17:59:33,366 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:59:33,367 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-20 17:59:33,401 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:59:33,623 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:59:33,631 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:59:33,830 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:59:33,872 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:59:33,872 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33 WrapperNode [2024-06-20 17:59:33,873 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:59:33,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:59:33,874 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:59:33,874 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:59:33,879 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 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,891 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 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,935 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-06-20 17:59:33,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:59:33,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:59:33,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:59:33,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:59:33,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,954 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,967 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 17:59:33,967 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,968 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,973 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,975 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,976 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,977 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,980 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:59:33,980 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:59:33,980 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:59:33,981 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:59:33,981 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (1/1) ... [2024-06-20 17:59:33,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:59:34,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:59:34,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 17:59:34,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 17:59:34,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:59:34,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:59:34,132 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:59:34,132 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:59:34,132 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:59:34,133 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:59:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:59:34,133 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:59:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 17:59:34,133 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 17:59:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:59:34,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:59:34,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:59:34,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:59:34,135 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:59:34,255 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:59:34,256 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:59:34,569 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:59:34,570 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:59:34,664 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:59:34,664 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:59:34,665 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:59:34 BoogieIcfgContainer [2024-06-20 17:59:34,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:59:34,668 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:59:34,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:59:34,670 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:59:34,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:59:33" (1/4) ... [2024-06-20 17:59:34,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737cc44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:59:34, skipping insertion in model container [2024-06-20 17:59:34,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:59:33" (2/4) ... [2024-06-20 17:59:34,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737cc44b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:59:34, skipping insertion in model container [2024-06-20 17:59:34,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:59:33" (3/4) ... [2024-06-20 17:59:34,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737cc44b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:59:34, skipping insertion in model container [2024-06-20 17:59:34,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:59:34" (4/4) ... [2024-06-20 17:59:34,678 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 17:59:34,691 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:59:34,691 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 17:59:34,692 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:59:34,749 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:59:34,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 49 transitions, 114 flow [2024-06-20 17:59:34,850 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2024-06-20 17:59:34,850 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:59:34,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:59:34,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 49 transitions, 114 flow [2024-06-20 17:59:34,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 90 flow [2024-06-20 17:59:34,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:59:34,873 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;@27c73c84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:59:34,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 17:59:34,875 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:59:34,876 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:59:34,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:59:34,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:34,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:59:34,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:34,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash 233368746, now seen corresponding path program 1 times [2024-06-20 17:59:34,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:34,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412224679] [2024-06-20 17:59:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:34,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:35,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:35,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412224679] [2024-06-20 17:59:35,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412224679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:35,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:35,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:59:35,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714928974] [2024-06-20 17:59:35,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:35,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:59:35,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:59:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:59:35,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-06-20 17:59:35,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:35,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:35,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-06-20 17:59:35,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:35,774 INFO L124 PetriNetUnfolderBase]: 1447/2145 cut-off events. [2024-06-20 17:59:35,774 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-06-20 17:59:35,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 2145 events. 1447/2145 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11460 event pairs, 968 based on Foata normal form. 1/2085 useless extension candidates. Maximal degree in co-relation 4322. Up to 2069 conditions per place. [2024-06-20 17:59:35,796 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 35 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-06-20 17:59:35,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 207 flow [2024-06-20 17:59:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:59:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:59:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-20 17:59:35,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278911564625851 [2024-06-20 17:59:35,808 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 90 flow. Second operand 3 states and 107 transitions. [2024-06-20 17:59:35,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 207 flow [2024-06-20 17:59:35,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 200 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:59:35,815 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 125 flow [2024-06-20 17:59:35,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-20 17:59:35,820 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-06-20 17:59:35,820 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 125 flow [2024-06-20 17:59:35,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:35,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:35,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:35,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:59:35,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:35,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1102372348, now seen corresponding path program 1 times [2024-06-20 17:59:35,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:35,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564268040] [2024-06-20 17:59:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:35,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:36,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:36,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564268040] [2024-06-20 17:59:36,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564268040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:36,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:36,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:59:36,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497256470] [2024-06-20 17:59:36,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:36,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:59:36,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:59:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:59:36,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 17:59:36,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:36,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:36,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 17:59:36,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:36,649 INFO L124 PetriNetUnfolderBase]: 2467/3605 cut-off events. [2024-06-20 17:59:36,649 INFO L125 PetriNetUnfolderBase]: For 758/966 co-relation queries the response was YES. [2024-06-20 17:59:36,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8515 conditions, 3605 events. 2467/3605 cut-off events. For 758/966 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19486 event pairs, 1331 based on Foata normal form. 35/3606 useless extension candidates. Maximal degree in co-relation 8503. Up to 3263 conditions per place. [2024-06-20 17:59:36,669 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 51 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2024-06-20 17:59:36,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 309 flow [2024-06-20 17:59:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:59:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:59:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-06-20 17:59:36,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2024-06-20 17:59:36,671 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 125 flow. Second operand 4 states and 138 transitions. [2024-06-20 17:59:36,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 309 flow [2024-06-20 17:59:36,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:59:36,673 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 152 flow [2024-06-20 17:59:36,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-20 17:59:36,674 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-06-20 17:59:36,674 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 152 flow [2024-06-20 17:59:36,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:36,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:36,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:36,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:59:36,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:36,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1297873024, now seen corresponding path program 1 times [2024-06-20 17:59:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:36,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367245826] [2024-06-20 17:59:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:36,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:36,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367245826] [2024-06-20 17:59:36,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367245826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:36,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:36,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:59:36,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867853884] [2024-06-20 17:59:36,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:36,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:59:36,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:36,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:59:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:59:36,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 17:59:36,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:36,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:36,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 17:59:36,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:37,332 INFO L124 PetriNetUnfolderBase]: 2618/4064 cut-off events. [2024-06-20 17:59:37,333 INFO L125 PetriNetUnfolderBase]: For 1862/1910 co-relation queries the response was YES. [2024-06-20 17:59:37,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9967 conditions, 4064 events. 2618/4064 cut-off events. For 1862/1910 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23315 event pairs, 1356 based on Foata normal form. 3/4039 useless extension candidates. Maximal degree in co-relation 9953. Up to 3654 conditions per place. [2024-06-20 17:59:37,358 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 49 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-20 17:59:37,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 340 flow [2024-06-20 17:59:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:59:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:59:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-20 17:59:37,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2024-06-20 17:59:37,361 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 152 flow. Second operand 4 states and 131 transitions. [2024-06-20 17:59:37,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 340 flow [2024-06-20 17:59:37,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 17:59:37,363 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 212 flow [2024-06-20 17:59:37,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-20 17:59:37,364 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2024-06-20 17:59:37,364 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 212 flow [2024-06-20 17:59:37,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:37,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:37,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:37,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:59:37,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:37,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:37,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1969928397, now seen corresponding path program 1 times [2024-06-20 17:59:37,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:37,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055126054] [2024-06-20 17:59:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:37,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:37,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:37,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055126054] [2024-06-20 17:59:37,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055126054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:37,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:37,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:59:37,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439068230] [2024-06-20 17:59:37,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:59:37,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:59:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:59:37,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 17:59:37,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:37,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:37,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 17:59:37,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:38,053 INFO L124 PetriNetUnfolderBase]: 2603/4009 cut-off events. [2024-06-20 17:59:38,054 INFO L125 PetriNetUnfolderBase]: For 3311/3363 co-relation queries the response was YES. [2024-06-20 17:59:38,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11036 conditions, 4009 events. 2603/4009 cut-off events. For 3311/3363 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22726 event pairs, 1272 based on Foata normal form. 6/3970 useless extension candidates. Maximal degree in co-relation 11020. Up to 3603 conditions per place. [2024-06-20 17:59:38,075 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 57 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-20 17:59:38,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 430 flow [2024-06-20 17:59:38,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:59:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:59:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-20 17:59:38,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-20 17:59:38,077 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 212 flow. Second operand 5 states and 161 transitions. [2024-06-20 17:59:38,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 430 flow [2024-06-20 17:59:38,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 426 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 17:59:38,080 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 264 flow [2024-06-20 17:59:38,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-20 17:59:38,081 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-06-20 17:59:38,081 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 264 flow [2024-06-20 17:59:38,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:38,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:38,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:38,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:59:38,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:38,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:38,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1726107371, now seen corresponding path program 1 times [2024-06-20 17:59:38,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:38,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903544673] [2024-06-20 17:59:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:38,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:38,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:38,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903544673] [2024-06-20 17:59:38,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903544673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:38,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:38,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:59:38,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299833652] [2024-06-20 17:59:38,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:38,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:59:38,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:59:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:59:38,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:38,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 264 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:38,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:38,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:38,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:38,875 INFO L124 PetriNetUnfolderBase]: 3372/5076 cut-off events. [2024-06-20 17:59:38,875 INFO L125 PetriNetUnfolderBase]: For 6317/6368 co-relation queries the response was YES. [2024-06-20 17:59:38,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15117 conditions, 5076 events. 3372/5076 cut-off events. For 6317/6368 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28339 event pairs, 1298 based on Foata normal form. 16/5060 useless extension candidates. Maximal degree in co-relation 15098. Up to 4533 conditions per place. [2024-06-20 17:59:38,900 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 55 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2024-06-20 17:59:38,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 502 flow [2024-06-20 17:59:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:59:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:59:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-20 17:59:38,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2024-06-20 17:59:38,902 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 264 flow. Second operand 4 states and 134 transitions. [2024-06-20 17:59:38,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 502 flow [2024-06-20 17:59:38,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 472 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:59:38,907 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 332 flow [2024-06-20 17:59:38,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-20 17:59:38,908 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-06-20 17:59:38,908 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 332 flow [2024-06-20 17:59:38,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:38,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:38,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:38,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:59:38,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:38,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1725987401, now seen corresponding path program 2 times [2024-06-20 17:59:38,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:38,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074150641] [2024-06-20 17:59:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:38,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:39,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:39,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074150641] [2024-06-20 17:59:39,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074150641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:39,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:39,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:59:39,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646511594] [2024-06-20 17:59:39,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:39,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:59:39,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:59:39,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:59:39,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:39,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:39,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:39,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:39,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:39,702 INFO L124 PetriNetUnfolderBase]: 3363/5186 cut-off events. [2024-06-20 17:59:39,702 INFO L125 PetriNetUnfolderBase]: For 9840/10023 co-relation queries the response was YES. [2024-06-20 17:59:39,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17169 conditions, 5186 events. 3363/5186 cut-off events. For 9840/10023 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29818 event pairs, 1431 based on Foata normal form. 18/5167 useless extension candidates. Maximal degree in co-relation 17149. Up to 4575 conditions per place. [2024-06-20 17:59:39,730 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 68 selfloop transitions, 20 changer transitions 0/98 dead transitions. [2024-06-20 17:59:39,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 98 transitions, 666 flow [2024-06-20 17:59:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:59:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:59:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-20 17:59:39,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-20 17:59:39,731 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 332 flow. Second operand 5 states and 161 transitions. [2024-06-20 17:59:39,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 98 transitions, 666 flow [2024-06-20 17:59:39,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 600 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 17:59:39,753 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 447 flow [2024-06-20 17:59:39,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=447, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-06-20 17:59:39,756 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-06-20 17:59:39,756 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 447 flow [2024-06-20 17:59:39,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:39,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:39,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:39,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:59:39,757 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:39,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2128335054, now seen corresponding path program 1 times [2024-06-20 17:59:39,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:39,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592875511] [2024-06-20 17:59:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:39,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:40,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:40,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592875511] [2024-06-20 17:59:40,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592875511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:40,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:40,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:40,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335335710] [2024-06-20 17:59:40,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:40,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:40,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:40,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:40,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:40,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:40,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:40,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:40,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:40,858 INFO L124 PetriNetUnfolderBase]: 4824/7273 cut-off events. [2024-06-20 17:59:40,872 INFO L125 PetriNetUnfolderBase]: For 18239/18453 co-relation queries the response was YES. [2024-06-20 17:59:40,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25583 conditions, 7273 events. 4824/7273 cut-off events. For 18239/18453 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43898 event pairs, 1097 based on Foata normal form. 104/7308 useless extension candidates. Maximal degree in co-relation 25560. Up to 4682 conditions per place. [2024-06-20 17:59:40,914 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 87 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-20 17:59:40,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 131 transitions, 945 flow [2024-06-20 17:59:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:59:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:59:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2024-06-20 17:59:40,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074829931972789 [2024-06-20 17:59:40,916 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 447 flow. Second operand 6 states and 208 transitions. [2024-06-20 17:59:40,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 131 transitions, 945 flow [2024-06-20 17:59:40,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 131 transitions, 913 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-20 17:59:40,927 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 594 flow [2024-06-20 17:59:40,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=594, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-20 17:59:40,928 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-06-20 17:59:40,928 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 594 flow [2024-06-20 17:59:40,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:40,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:40,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:40,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:59:40,929 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:40,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1393136916, now seen corresponding path program 2 times [2024-06-20 17:59:40,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:40,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220207626] [2024-06-20 17:59:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:40,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:41,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:41,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220207626] [2024-06-20 17:59:41,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220207626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:41,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:41,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:41,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921526192] [2024-06-20 17:59:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:41,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:41,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:41,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:41,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:41,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 594 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:41,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:41,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:41,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:42,028 INFO L124 PetriNetUnfolderBase]: 4554/6933 cut-off events. [2024-06-20 17:59:42,029 INFO L125 PetriNetUnfolderBase]: For 24501/24735 co-relation queries the response was YES. [2024-06-20 17:59:42,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26096 conditions, 6933 events. 4554/6933 cut-off events. For 24501/24735 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41859 event pairs, 1415 based on Foata normal form. 122/6980 useless extension candidates. Maximal degree in co-relation 26069. Up to 5428 conditions per place. [2024-06-20 17:59:42,113 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 77 selfloop transitions, 29 changer transitions 0/116 dead transitions. [2024-06-20 17:59:42,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 116 transitions, 936 flow [2024-06-20 17:59:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:59:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:59:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-20 17:59:42,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.689795918367347 [2024-06-20 17:59:42,117 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 594 flow. Second operand 5 states and 169 transitions. [2024-06-20 17:59:42,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 116 transitions, 936 flow [2024-06-20 17:59:42,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 116 transitions, 884 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 17:59:42,153 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 646 flow [2024-06-20 17:59:42,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=646, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-20 17:59:42,155 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2024-06-20 17:59:42,155 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 646 flow [2024-06-20 17:59:42,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:42,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:42,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:42,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:59:42,156 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:42,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:42,157 INFO L85 PathProgramCache]: Analyzing trace with hash -816466250, now seen corresponding path program 3 times [2024-06-20 17:59:42,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:42,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192588430] [2024-06-20 17:59:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:42,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:42,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:42,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192588430] [2024-06-20 17:59:42,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192588430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:42,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:42,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:42,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993007686] [2024-06-20 17:59:42,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:42,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:42,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:42,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:42,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:42,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 646 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:42,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:42,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:42,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:43,186 INFO L124 PetriNetUnfolderBase]: 4631/7073 cut-off events. [2024-06-20 17:59:43,186 INFO L125 PetriNetUnfolderBase]: For 25081/25369 co-relation queries the response was YES. [2024-06-20 17:59:43,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27069 conditions, 7073 events. 4631/7073 cut-off events. For 25081/25369 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42789 event pairs, 1615 based on Foata normal form. 34/7038 useless extension candidates. Maximal degree in co-relation 27040. Up to 6275 conditions per place. [2024-06-20 17:59:43,231 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 22 changer transitions 0/121 dead transitions. [2024-06-20 17:59:43,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 996 flow [2024-06-20 17:59:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:59:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:59:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-20 17:59:43,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-06-20 17:59:43,232 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 646 flow. Second operand 6 states and 192 transitions. [2024-06-20 17:59:43,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 996 flow [2024-06-20 17:59:43,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 948 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 17:59:43,274 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 682 flow [2024-06-20 17:59:43,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=682, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-20 17:59:43,275 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2024-06-20 17:59:43,275 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 682 flow [2024-06-20 17:59:43,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:43,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:43,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:43,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:59:43,276 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:43,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash -816281800, now seen corresponding path program 1 times [2024-06-20 17:59:43,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:43,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103820326] [2024-06-20 17:59:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:43,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:43,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:43,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103820326] [2024-06-20 17:59:43,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103820326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:43,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:43,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:43,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435593002] [2024-06-20 17:59:43,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:43,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:43,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:43,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:43,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:43,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:43,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:43,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:43,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:43,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:44,241 INFO L124 PetriNetUnfolderBase]: 4592/7016 cut-off events. [2024-06-20 17:59:44,241 INFO L125 PetriNetUnfolderBase]: For 27475/27763 co-relation queries the response was YES. [2024-06-20 17:59:44,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27209 conditions, 7016 events. 4592/7016 cut-off events. For 27475/27763 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42382 event pairs, 1399 based on Foata normal form. 28/6975 useless extension candidates. Maximal degree in co-relation 27179. Up to 5876 conditions per place. [2024-06-20 17:59:44,286 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2024-06-20 17:59:44,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1059 flow [2024-06-20 17:59:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:59:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:59:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-20 17:59:44,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-20 17:59:44,288 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 682 flow. Second operand 6 states and 194 transitions. [2024-06-20 17:59:44,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1059 flow [2024-06-20 17:59:44,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1005 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:59:44,327 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 736 flow [2024-06-20 17:59:44,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=736, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-06-20 17:59:44,329 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2024-06-20 17:59:44,331 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 736 flow [2024-06-20 17:59:44,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:44,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:44,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:44,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:59:44,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:44,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash 176708674, now seen corresponding path program 1 times [2024-06-20 17:59:44,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:44,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038038221] [2024-06-20 17:59:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:44,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:44,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:44,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038038221] [2024-06-20 17:59:44,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038038221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:44,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:44,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:59:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554071341] [2024-06-20 17:59:44,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:44,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:59:44,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:59:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:59:44,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 17:59:44,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 736 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:44,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:44,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 17:59:44,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:45,084 INFO L124 PetriNetUnfolderBase]: 3701/5678 cut-off events. [2024-06-20 17:59:45,085 INFO L125 PetriNetUnfolderBase]: For 26498/26719 co-relation queries the response was YES. [2024-06-20 17:59:45,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23358 conditions, 5678 events. 3701/5678 cut-off events. For 26498/26719 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33929 event pairs, 1373 based on Foata normal form. 6/5624 useless extension candidates. Maximal degree in co-relation 23326. Up to 5213 conditions per place. [2024-06-20 17:59:45,122 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 87 selfloop transitions, 20 changer transitions 0/118 dead transitions. [2024-06-20 17:59:45,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 118 transitions, 1106 flow [2024-06-20 17:59:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:59:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:59:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-20 17:59:45,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448979591836734 [2024-06-20 17:59:45,124 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 736 flow. Second operand 5 states and 158 transitions. [2024-06-20 17:59:45,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 118 transitions, 1106 flow [2024-06-20 17:59:45,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 118 transitions, 1047 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 17:59:45,157 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 866 flow [2024-06-20 17:59:45,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-20 17:59:45,157 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-06-20 17:59:45,158 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 866 flow [2024-06-20 17:59:45,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:45,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:45,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:45,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:59:45,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:45,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash 228593815, now seen corresponding path program 1 times [2024-06-20 17:59:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:45,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888249691] [2024-06-20 17:59:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:45,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:45,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:45,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888249691] [2024-06-20 17:59:45,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888249691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:45,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:45,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:59:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93803530] [2024-06-20 17:59:45,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:45,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:59:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:59:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:59:45,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 17:59:45,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 866 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:45,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:45,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 17:59:45,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:46,191 INFO L124 PetriNetUnfolderBase]: 5235/7909 cut-off events. [2024-06-20 17:59:46,191 INFO L125 PetriNetUnfolderBase]: For 41346/41452 co-relation queries the response was YES. [2024-06-20 17:59:46,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31917 conditions, 7909 events. 5235/7909 cut-off events. For 41346/41452 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48386 event pairs, 1971 based on Foata normal form. 12/7763 useless extension candidates. Maximal degree in co-relation 31882. Up to 7087 conditions per place. [2024-06-20 17:59:46,251 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 76 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-06-20 17:59:46,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 118 transitions, 1138 flow [2024-06-20 17:59:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:59:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:59:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-20 17:59:46,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-20 17:59:46,269 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 866 flow. Second operand 4 states and 122 transitions. [2024-06-20 17:59:46,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 118 transitions, 1138 flow [2024-06-20 17:59:46,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 1096 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-20 17:59:46,348 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 947 flow [2024-06-20 17:59:46,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=947, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-06-20 17:59:46,349 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2024-06-20 17:59:46,349 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 947 flow [2024-06-20 17:59:46,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:46,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:46,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:46,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:59:46,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:46,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:46,351 INFO L85 PathProgramCache]: Analyzing trace with hash -573087969, now seen corresponding path program 1 times [2024-06-20 17:59:46,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:46,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297364008] [2024-06-20 17:59:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:46,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:46,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:46,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297364008] [2024-06-20 17:59:46,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297364008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:46,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:46,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:59:46,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175280699] [2024-06-20 17:59:46,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:46,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:59:46,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:46,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:59:46,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:59:46,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 17:59:46,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 947 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:46,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:46,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 17:59:46,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:47,548 INFO L124 PetriNetUnfolderBase]: 4657/7188 cut-off events. [2024-06-20 17:59:47,548 INFO L125 PetriNetUnfolderBase]: For 44422/44823 co-relation queries the response was YES. [2024-06-20 17:59:47,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32052 conditions, 7188 events. 4657/7188 cut-off events. For 44422/44823 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44546 event pairs, 1500 based on Foata normal form. 102/7216 useless extension candidates. Maximal degree in co-relation 32013. Up to 5914 conditions per place. [2024-06-20 17:59:47,598 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 102 selfloop transitions, 32 changer transitions 0/149 dead transitions. [2024-06-20 17:59:47,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 149 transitions, 1450 flow [2024-06-20 17:59:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:59:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:59:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-20 17:59:47,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-20 17:59:47,599 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 947 flow. Second operand 6 states and 194 transitions. [2024-06-20 17:59:47,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 149 transitions, 1450 flow [2024-06-20 17:59:47,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 149 transitions, 1446 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 17:59:47,667 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 1117 flow [2024-06-20 17:59:47,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1117, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2024-06-20 17:59:47,667 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 46 predicate places. [2024-06-20 17:59:47,667 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 1117 flow [2024-06-20 17:59:47,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:47,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:47,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:47,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:59:47,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:47,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:47,668 INFO L85 PathProgramCache]: Analyzing trace with hash 547062797, now seen corresponding path program 2 times [2024-06-20 17:59:47,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:47,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869186319] [2024-06-20 17:59:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:47,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:47,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:47,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869186319] [2024-06-20 17:59:47,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869186319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:47,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:47,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:59:47,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901214327] [2024-06-20 17:59:47,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:47,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:59:47,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:47,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:59:47,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:59:48,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 17:59:48,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 1117 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:48,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:48,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 17:59:48,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:48,628 INFO L124 PetriNetUnfolderBase]: 4558/7078 cut-off events. [2024-06-20 17:59:48,629 INFO L125 PetriNetUnfolderBase]: For 49842/50193 co-relation queries the response was YES. [2024-06-20 17:59:48,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32306 conditions, 7078 events. 4558/7078 cut-off events. For 49842/50193 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44089 event pairs, 1607 based on Foata normal form. 60/7064 useless extension candidates. Maximal degree in co-relation 32263. Up to 6243 conditions per place. [2024-06-20 17:59:48,682 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 100 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-20 17:59:48,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1453 flow [2024-06-20 17:59:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:59:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:59:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-20 17:59:48,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-20 17:59:48,684 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 1117 flow. Second operand 6 states and 187 transitions. [2024-06-20 17:59:48,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1453 flow [2024-06-20 17:59:48,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1371 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 17:59:48,807 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1095 flow [2024-06-20 17:59:48,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1095, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-20 17:59:48,807 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2024-06-20 17:59:48,807 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1095 flow [2024-06-20 17:59:48,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:48,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:48,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:48,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:59:48,808 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:48,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:48,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1762622183, now seen corresponding path program 1 times [2024-06-20 17:59:48,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:48,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839949908] [2024-06-20 17:59:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:48,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:49,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:49,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839949908] [2024-06-20 17:59:49,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839949908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:49,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:49,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:49,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955218402] [2024-06-20 17:59:49,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:49,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:49,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:49,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:49,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:49,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1095 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:49,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:49,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:49,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:49,845 INFO L124 PetriNetUnfolderBase]: 5399/8107 cut-off events. [2024-06-20 17:59:49,846 INFO L125 PetriNetUnfolderBase]: For 53418/53807 co-relation queries the response was YES. [2024-06-20 17:59:49,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36429 conditions, 8107 events. 5399/8107 cut-off events. For 53418/53807 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49203 event pairs, 1733 based on Foata normal form. 56/8035 useless extension candidates. Maximal degree in co-relation 36385. Up to 7318 conditions per place. [2024-06-20 17:59:49,901 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 87 selfloop transitions, 41 changer transitions 0/140 dead transitions. [2024-06-20 17:59:49,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 140 transitions, 1463 flow [2024-06-20 17:59:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:59:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:59:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-20 17:59:49,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-06-20 17:59:49,903 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1095 flow. Second operand 5 states and 160 transitions. [2024-06-20 17:59:49,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 140 transitions, 1463 flow [2024-06-20 17:59:49,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 140 transitions, 1407 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 17:59:49,988 INFO L231 Difference]: Finished difference. Result has 102 places, 116 transitions, 1189 flow [2024-06-20 17:59:49,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=116} [2024-06-20 17:59:49,988 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-06-20 17:59:49,989 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 116 transitions, 1189 flow [2024-06-20 17:59:49,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:49,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:49,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:49,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:59:49,989 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:49,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:49,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1877913353, now seen corresponding path program 2 times [2024-06-20 17:59:49,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:49,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543905025] [2024-06-20 17:59:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:49,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:50,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543905025] [2024-06-20 17:59:50,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543905025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:50,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:50,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:50,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078474210] [2024-06-20 17:59:50,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:50,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:50,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:50,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:50,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:50,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:50,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 1189 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:50,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:50,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:50,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:50,988 INFO L124 PetriNetUnfolderBase]: 5466/8212 cut-off events. [2024-06-20 17:59:50,988 INFO L125 PetriNetUnfolderBase]: For 62280/62845 co-relation queries the response was YES. [2024-06-20 17:59:51,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38853 conditions, 8212 events. 5466/8212 cut-off events. For 62280/62845 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49988 event pairs, 1737 based on Foata normal form. 90/8176 useless extension candidates. Maximal degree in co-relation 38808. Up to 7362 conditions per place. [2024-06-20 17:59:51,047 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 93 selfloop transitions, 51 changer transitions 0/156 dead transitions. [2024-06-20 17:59:51,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 156 transitions, 1723 flow [2024-06-20 17:59:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:59:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:59:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-20 17:59:51,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-20 17:59:51,049 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 1189 flow. Second operand 6 states and 190 transitions. [2024-06-20 17:59:51,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 156 transitions, 1723 flow [2024-06-20 17:59:51,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 1621 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 17:59:51,152 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 1314 flow [2024-06-20 17:59:51,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1314, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-20 17:59:51,153 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 53 predicate places. [2024-06-20 17:59:51,153 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 1314 flow [2024-06-20 17:59:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:51,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:51,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:51,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:59:51,154 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:51,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1878182123, now seen corresponding path program 3 times [2024-06-20 17:59:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:51,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854283174] [2024-06-20 17:59:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:51,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:51,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854283174] [2024-06-20 17:59:51,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854283174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:51,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:51,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657370601] [2024-06-20 17:59:51,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:51,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:51,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:51,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:51,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:51,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 1314 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:51,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:51,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:51,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:52,225 INFO L124 PetriNetUnfolderBase]: 5482/8238 cut-off events. [2024-06-20 17:59:52,225 INFO L125 PetriNetUnfolderBase]: For 72752/73320 co-relation queries the response was YES. [2024-06-20 17:59:52,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40964 conditions, 8238 events. 5482/8238 cut-off events. For 72752/73320 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50100 event pairs, 1737 based on Foata normal form. 103/8215 useless extension candidates. Maximal degree in co-relation 40918. Up to 7379 conditions per place. [2024-06-20 17:59:52,288 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 91 selfloop transitions, 55 changer transitions 0/158 dead transitions. [2024-06-20 17:59:52,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1806 flow [2024-06-20 17:59:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:59:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:59:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-20 17:59:52,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-06-20 17:59:52,289 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 1314 flow. Second operand 6 states and 188 transitions. [2024-06-20 17:59:52,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1806 flow [2024-06-20 17:59:52,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 158 transitions, 1707 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-20 17:59:52,419 INFO L231 Difference]: Finished difference. Result has 109 places, 128 transitions, 1396 flow [2024-06-20 17:59:52,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1396, PETRI_PLACES=109, PETRI_TRANSITIONS=128} [2024-06-20 17:59:52,420 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-20 17:59:52,420 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 128 transitions, 1396 flow [2024-06-20 17:59:52,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:52,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:52,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:52,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:59:52,421 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:52,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:52,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1521738569, now seen corresponding path program 4 times [2024-06-20 17:59:52,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:52,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524881065] [2024-06-20 17:59:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:52,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:52,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:52,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524881065] [2024-06-20 17:59:52,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524881065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:52,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:52,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:52,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684169405] [2024-06-20 17:59:52,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:52,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:52,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:52,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:52,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:52,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:52,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 128 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:52,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:52,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:52,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:53,525 INFO L124 PetriNetUnfolderBase]: 5440/8168 cut-off events. [2024-06-20 17:59:53,525 INFO L125 PetriNetUnfolderBase]: For 77188/77756 co-relation queries the response was YES. [2024-06-20 17:59:53,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41051 conditions, 8168 events. 5440/8168 cut-off events. For 77188/77756 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49562 event pairs, 1743 based on Foata normal form. 46/8088 useless extension candidates. Maximal degree in co-relation 41003. Up to 7376 conditions per place. [2024-06-20 17:59:53,585 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 101 selfloop transitions, 41 changer transitions 0/154 dead transitions. [2024-06-20 17:59:53,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 154 transitions, 1750 flow [2024-06-20 17:59:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:59:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:59:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-20 17:59:53,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-20 17:59:53,587 INFO L175 Difference]: Start difference. First operand has 109 places, 128 transitions, 1396 flow. Second operand 5 states and 162 transitions. [2024-06-20 17:59:53,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 154 transitions, 1750 flow [2024-06-20 17:59:53,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 154 transitions, 1595 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-20 17:59:53,745 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1337 flow [2024-06-20 17:59:53,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1337, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2024-06-20 17:59:53,746 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-20 17:59:53,746 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1337 flow [2024-06-20 17:59:53,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:53,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:53,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:53,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:59:53,747 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:53,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:53,747 INFO L85 PathProgramCache]: Analyzing trace with hash 923773174, now seen corresponding path program 1 times [2024-06-20 17:59:53,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:53,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407619868] [2024-06-20 17:59:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:53,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:54,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:54,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407619868] [2024-06-20 17:59:54,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407619868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:54,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:54,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:59:54,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184413394] [2024-06-20 17:59:54,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:54,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:59:54,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:59:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:59:54,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 17:59:54,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1337 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:54,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:54,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 17:59:54,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:54,863 INFO L124 PetriNetUnfolderBase]: 5397/8145 cut-off events. [2024-06-20 17:59:54,864 INFO L125 PetriNetUnfolderBase]: For 88152/88271 co-relation queries the response was YES. [2024-06-20 17:59:54,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39954 conditions, 8145 events. 5397/8145 cut-off events. For 88152/88271 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 50157 event pairs, 1842 based on Foata normal form. 16/7976 useless extension candidates. Maximal degree in co-relation 39905. Up to 7236 conditions per place. [2024-06-20 17:59:54,916 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 87 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-20 17:59:54,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1645 flow [2024-06-20 17:59:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:59:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:59:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-20 17:59:54,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-20 17:59:54,918 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 1337 flow. Second operand 4 states and 126 transitions. [2024-06-20 17:59:54,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1645 flow [2024-06-20 17:59:55,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1530 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 17:59:55,034 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1350 flow [2024-06-20 17:59:55,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1350, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2024-06-20 17:59:55,034 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 58 predicate places. [2024-06-20 17:59:55,034 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1350 flow [2024-06-20 17:59:55,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:55,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:55,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:55,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:59:55,035 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:55,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:55,036 INFO L85 PathProgramCache]: Analyzing trace with hash 635343158, now seen corresponding path program 2 times [2024-06-20 17:59:55,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:55,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133817709] [2024-06-20 17:59:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:55,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:55,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:55,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133817709] [2024-06-20 17:59:55,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133817709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:55,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:55,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:55,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904571722] [2024-06-20 17:59:55,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:55,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:55,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:55,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:55,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1350 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:55,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:55,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:55,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:56,107 INFO L124 PetriNetUnfolderBase]: 5380/8161 cut-off events. [2024-06-20 17:59:56,108 INFO L125 PetriNetUnfolderBase]: For 94457/94581 co-relation queries the response was YES. [2024-06-20 17:59:56,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42171 conditions, 8161 events. 5380/8161 cut-off events. For 94457/94581 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 50452 event pairs, 1830 based on Foata normal form. 28/8011 useless extension candidates. Maximal degree in co-relation 42120. Up to 7255 conditions per place. [2024-06-20 17:59:56,173 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 108 selfloop transitions, 30 changer transitions 0/170 dead transitions. [2024-06-20 17:59:56,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 170 transitions, 1829 flow [2024-06-20 17:59:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:59:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:59:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-20 17:59:56,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5743440233236151 [2024-06-20 17:59:56,175 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1350 flow. Second operand 7 states and 197 transitions. [2024-06-20 17:59:56,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 170 transitions, 1829 flow [2024-06-20 17:59:56,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 170 transitions, 1738 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-20 17:59:56,343 INFO L231 Difference]: Finished difference. Result has 117 places, 147 transitions, 1515 flow [2024-06-20 17:59:56,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=117, PETRI_TRANSITIONS=147} [2024-06-20 17:59:56,344 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 65 predicate places. [2024-06-20 17:59:56,344 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 147 transitions, 1515 flow [2024-06-20 17:59:56,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:56,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:56,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:56,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:59:56,345 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:56,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash 624873590, now seen corresponding path program 1 times [2024-06-20 17:59:56,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:56,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908537208] [2024-06-20 17:59:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:56,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:56,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:56,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908537208] [2024-06-20 17:59:56,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908537208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:56,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:56,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:59:56,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660189480] [2024-06-20 17:59:56,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:56,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:59:56,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:56,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:59:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:59:56,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:59:56,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 147 transitions, 1515 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:56,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:56,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:59:56,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:57,613 INFO L124 PetriNetUnfolderBase]: 5943/8874 cut-off events. [2024-06-20 17:59:57,614 INFO L125 PetriNetUnfolderBase]: For 93354/93354 co-relation queries the response was YES. [2024-06-20 17:59:57,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46582 conditions, 8874 events. 5943/8874 cut-off events. For 93354/93354 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52847 event pairs, 1941 based on Foata normal form. 1/8871 useless extension candidates. Maximal degree in co-relation 46529. Up to 8299 conditions per place. [2024-06-20 17:59:57,693 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 155 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-06-20 17:59:57,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 183 transitions, 2142 flow [2024-06-20 17:59:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:59:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:59:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-20 17:59:57,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 17:59:57,695 INFO L175 Difference]: Start difference. First operand has 117 places, 147 transitions, 1515 flow. Second operand 5 states and 147 transitions. [2024-06-20 17:59:57,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 183 transitions, 2142 flow [2024-06-20 17:59:57,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 183 transitions, 2085 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-20 17:59:57,960 INFO L231 Difference]: Finished difference. Result has 122 places, 164 transitions, 1739 flow [2024-06-20 17:59:57,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1739, PETRI_PLACES=122, PETRI_TRANSITIONS=164} [2024-06-20 17:59:57,961 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-06-20 17:59:57,961 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 164 transitions, 1739 flow [2024-06-20 17:59:57,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:57,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:57,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:57,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:59:57,962 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:57,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:57,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2094810200, now seen corresponding path program 2 times [2024-06-20 17:59:57,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:57,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795909902] [2024-06-20 17:59:57,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:57,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:58,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795909902] [2024-06-20 17:59:58,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795909902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:58,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:58,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:59:58,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358566586] [2024-06-20 17:59:58,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:58,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:59:58,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:58,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:59:58,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:59:58,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:59:58,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 164 transitions, 1739 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:58,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:58,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:59:58,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:59,161 INFO L124 PetriNetUnfolderBase]: 5939/8875 cut-off events. [2024-06-20 17:59:59,162 INFO L125 PetriNetUnfolderBase]: For 103069/103069 co-relation queries the response was YES. [2024-06-20 17:59:59,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48274 conditions, 8875 events. 5939/8875 cut-off events. For 103069/103069 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 53059 event pairs, 1957 based on Foata normal form. 1/8871 useless extension candidates. Maximal degree in co-relation 48217. Up to 8295 conditions per place. [2024-06-20 17:59:59,220 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 148 selfloop transitions, 20 changer transitions 0/177 dead transitions. [2024-06-20 17:59:59,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 177 transitions, 2114 flow [2024-06-20 17:59:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:59:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:59:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-20 17:59:59,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 17:59:59,222 INFO L175 Difference]: Start difference. First operand has 122 places, 164 transitions, 1739 flow. Second operand 5 states and 140 transitions. [2024-06-20 17:59:59,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 177 transitions, 2114 flow [2024-06-20 17:59:59,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 177 transitions, 2050 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-20 17:59:59,494 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1731 flow [2024-06-20 17:59:59,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1731, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-20 17:59:59,494 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 75 predicate places. [2024-06-20 17:59:59,494 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1731 flow [2024-06-20 17:59:59,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:59,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:59,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:59,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:59:59,495 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:59,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2048349136, now seen corresponding path program 1 times [2024-06-20 17:59:59,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:59,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692222416] [2024-06-20 17:59:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:59,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:59,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692222416] [2024-06-20 17:59:59,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692222416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:59,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:59,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:59:59,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251065825] [2024-06-20 17:59:59,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:59,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:59:59,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:59:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:59:59,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 17:59:59,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1731 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:59,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:59,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 17:59:59,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:00,626 INFO L124 PetriNetUnfolderBase]: 5414/8249 cut-off events. [2024-06-20 18:00:00,626 INFO L125 PetriNetUnfolderBase]: For 107977/107982 co-relation queries the response was YES. [2024-06-20 18:00:00,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44964 conditions, 8249 events. 5414/8249 cut-off events. For 107977/107982 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50926 event pairs, 1885 based on Foata normal form. 9/8116 useless extension candidates. Maximal degree in co-relation 44904. Up to 7271 conditions per place. [2024-06-20 18:00:00,703 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 125 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-06-20 18:00:00,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 181 transitions, 2075 flow [2024-06-20 18:00:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:00:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:00:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-20 18:00:00,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-06-20 18:00:00,705 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1731 flow. Second operand 5 states and 146 transitions. [2024-06-20 18:00:00,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 181 transitions, 2075 flow [2024-06-20 18:00:00,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 181 transitions, 2040 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-20 18:00:00,953 INFO L231 Difference]: Finished difference. Result has 131 places, 168 transitions, 1771 flow [2024-06-20 18:00:00,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1771, PETRI_PLACES=131, PETRI_TRANSITIONS=168} [2024-06-20 18:00:00,953 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-06-20 18:00:00,954 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 168 transitions, 1771 flow [2024-06-20 18:00:00,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:00,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:00,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:00,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 18:00:00,954 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:00,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1785288403, now seen corresponding path program 1 times [2024-06-20 18:00:00,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:00,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501708444] [2024-06-20 18:00:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:00,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:01,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:01,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501708444] [2024-06-20 18:00:01,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501708444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:01,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:01,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:00:01,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068720825] [2024-06-20 18:00:01,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:01,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:00:01,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:01,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:00:01,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:00:01,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:01,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 168 transitions, 1771 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:01,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:01,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:01,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:02,157 INFO L124 PetriNetUnfolderBase]: 5639/8539 cut-off events. [2024-06-20 18:00:02,158 INFO L125 PetriNetUnfolderBase]: For 114330/114337 co-relation queries the response was YES. [2024-06-20 18:00:02,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47709 conditions, 8539 events. 5639/8539 cut-off events. For 114330/114337 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 51977 event pairs, 1938 based on Foata normal form. 6/8502 useless extension candidates. Maximal degree in co-relation 47647. Up to 7745 conditions per place. [2024-06-20 18:00:02,241 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 144 selfloop transitions, 26 changer transitions 0/191 dead transitions. [2024-06-20 18:00:02,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 2262 flow [2024-06-20 18:00:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:00:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:00:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-20 18:00:02,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-06-20 18:00:02,242 INFO L175 Difference]: Start difference. First operand has 131 places, 168 transitions, 1771 flow. Second operand 5 states and 146 transitions. [2024-06-20 18:00:02,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 2262 flow [2024-06-20 18:00:02,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 191 transitions, 2221 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 18:00:02,623 INFO L231 Difference]: Finished difference. Result has 136 places, 179 transitions, 1955 flow [2024-06-20 18:00:02,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1955, PETRI_PLACES=136, PETRI_TRANSITIONS=179} [2024-06-20 18:00:02,624 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 84 predicate places. [2024-06-20 18:00:02,624 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 179 transitions, 1955 flow [2024-06-20 18:00:02,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:02,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:02,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:02,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 18:00:02,625 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:02,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash 409768202, now seen corresponding path program 1 times [2024-06-20 18:00:02,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:02,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597902545] [2024-06-20 18:00:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:02,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:03,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597902545] [2024-06-20 18:00:03,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597902545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:03,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:03,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:00:03,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433495372] [2024-06-20 18:00:03,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:03,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:00:03,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:03,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:00:03,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:00:03,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:00:03,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 179 transitions, 1955 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 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) [2024-06-20 18:00:03,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:03,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:00:03,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:04,283 INFO L124 PetriNetUnfolderBase]: 6515/10012 cut-off events. [2024-06-20 18:00:04,283 INFO L125 PetriNetUnfolderBase]: For 173836/174608 co-relation queries the response was YES. [2024-06-20 18:00:04,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60262 conditions, 10012 events. 6515/10012 cut-off events. For 173836/174608 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 64708 event pairs, 1263 based on Foata normal form. 113/9937 useless extension candidates. Maximal degree in co-relation 60195. Up to 5174 conditions per place. [2024-06-20 18:00:04,387 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 158 selfloop transitions, 70 changer transitions 0/243 dead transitions. [2024-06-20 18:00:04,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 243 transitions, 2931 flow [2024-06-20 18:00:04,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:00:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:00:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-06-20 18:00:04,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6676384839650146 [2024-06-20 18:00:04,411 INFO L175 Difference]: Start difference. First operand has 136 places, 179 transitions, 1955 flow. Second operand 7 states and 229 transitions. [2024-06-20 18:00:04,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 243 transitions, 2931 flow [2024-06-20 18:00:04,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 243 transitions, 2873 flow, removed 29 selfloop flow, removed 0 redundant places. [2024-06-20 18:00:04,898 INFO L231 Difference]: Finished difference. Result has 144 places, 184 transitions, 2179 flow [2024-06-20 18:00:04,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1897, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2179, PETRI_PLACES=144, PETRI_TRANSITIONS=184} [2024-06-20 18:00:04,899 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 92 predicate places. [2024-06-20 18:00:04,899 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 184 transitions, 2179 flow [2024-06-20 18:00:04,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 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) [2024-06-20 18:00:04,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:04,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:04,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 18:00:04,900 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:04,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:04,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1595065956, now seen corresponding path program 2 times [2024-06-20 18:00:04,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:04,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612132482] [2024-06-20 18:00:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:04,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:05,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:05,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612132482] [2024-06-20 18:00:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612132482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:05,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073456788] [2024-06-20 18:00:05,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:05,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:05,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:05,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:05,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 184 transitions, 2179 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:05,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:05,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:05,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:06,656 INFO L124 PetriNetUnfolderBase]: 6410/9860 cut-off events. [2024-06-20 18:00:06,657 INFO L125 PetriNetUnfolderBase]: For 179318/180064 co-relation queries the response was YES. [2024-06-20 18:00:06,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60871 conditions, 9860 events. 6410/9860 cut-off events. For 179318/180064 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 63284 event pairs, 1641 based on Foata normal form. 46/9696 useless extension candidates. Maximal degree in co-relation 60801. Up to 8219 conditions per place. [2024-06-20 18:00:06,789 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 173 selfloop transitions, 33 changer transitions 0/222 dead transitions. [2024-06-20 18:00:06,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 222 transitions, 2759 flow [2024-06-20 18:00:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:00:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:00:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-20 18:00:06,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-20 18:00:06,791 INFO L175 Difference]: Start difference. First operand has 144 places, 184 transitions, 2179 flow. Second operand 6 states and 189 transitions. [2024-06-20 18:00:06,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 222 transitions, 2759 flow [2024-06-20 18:00:07,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 222 transitions, 2679 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 18:00:07,443 INFO L231 Difference]: Finished difference. Result has 148 places, 184 transitions, 2171 flow [2024-06-20 18:00:07,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2171, PETRI_PLACES=148, PETRI_TRANSITIONS=184} [2024-06-20 18:00:07,444 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 96 predicate places. [2024-06-20 18:00:07,444 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 184 transitions, 2171 flow [2024-06-20 18:00:07,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:07,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:07,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:07,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 18:00:07,445 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:07,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:07,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1305195574, now seen corresponding path program 3 times [2024-06-20 18:00:07,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:07,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986487618] [2024-06-20 18:00:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:07,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:07,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:07,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986487618] [2024-06-20 18:00:07,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986487618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:07,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:07,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:07,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635432286] [2024-06-20 18:00:07,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:07,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:07,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:07,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:07,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:07,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 184 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:07,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:07,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:07,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:09,259 INFO L124 PetriNetUnfolderBase]: 6696/10254 cut-off events. [2024-06-20 18:00:09,259 INFO L125 PetriNetUnfolderBase]: For 201731/202614 co-relation queries the response was YES. [2024-06-20 18:00:09,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63805 conditions, 10254 events. 6696/10254 cut-off events. For 201731/202614 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 66367 event pairs, 1963 based on Foata normal form. 180/10211 useless extension candidates. Maximal degree in co-relation 63733. Up to 6691 conditions per place. [2024-06-20 18:00:09,388 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 151 selfloop transitions, 63 changer transitions 0/230 dead transitions. [2024-06-20 18:00:09,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 230 transitions, 2928 flow [2024-06-20 18:00:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:00:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:00:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-20 18:00:09,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-06-20 18:00:09,389 INFO L175 Difference]: Start difference. First operand has 148 places, 184 transitions, 2171 flow. Second operand 6 states and 200 transitions. [2024-06-20 18:00:09,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 230 transitions, 2928 flow [2024-06-20 18:00:09,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 230 transitions, 2854 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 18:00:09,960 INFO L231 Difference]: Finished difference. Result has 150 places, 185 transitions, 2261 flow [2024-06-20 18:00:09,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2261, PETRI_PLACES=150, PETRI_TRANSITIONS=185} [2024-06-20 18:00:09,960 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-20 18:00:09,960 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 185 transitions, 2261 flow [2024-06-20 18:00:09,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:09,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:09,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:09,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 18:00:09,961 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:09,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:09,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1742362790, now seen corresponding path program 4 times [2024-06-20 18:00:09,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:09,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918277543] [2024-06-20 18:00:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:09,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:10,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:10,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918277543] [2024-06-20 18:00:10,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918277543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:10,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:10,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:10,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929210534] [2024-06-20 18:00:10,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:10,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:10,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:10,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:10,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:10,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 185 transitions, 2261 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:10,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:10,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:10,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:11,836 INFO L124 PetriNetUnfolderBase]: 6544/10046 cut-off events. [2024-06-20 18:00:11,836 INFO L125 PetriNetUnfolderBase]: For 201591/202449 co-relation queries the response was YES. [2024-06-20 18:00:11,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61911 conditions, 10046 events. 6544/10046 cut-off events. For 201591/202449 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 64872 event pairs, 2177 based on Foata normal form. 164/9985 useless extension candidates. Maximal degree in co-relation 61838. Up to 8188 conditions per place. [2024-06-20 18:00:11,937 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 148 selfloop transitions, 55 changer transitions 0/219 dead transitions. [2024-06-20 18:00:11,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 219 transitions, 2819 flow [2024-06-20 18:00:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:00:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:00:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-20 18:00:11,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2024-06-20 18:00:11,939 INFO L175 Difference]: Start difference. First operand has 150 places, 185 transitions, 2261 flow. Second operand 6 states and 191 transitions. [2024-06-20 18:00:11,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 219 transitions, 2819 flow [2024-06-20 18:00:12,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 219 transitions, 2663 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 18:00:12,451 INFO L231 Difference]: Finished difference. Result has 151 places, 185 transitions, 2227 flow [2024-06-20 18:00:12,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2227, PETRI_PLACES=151, PETRI_TRANSITIONS=185} [2024-06-20 18:00:12,452 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 99 predicate places. [2024-06-20 18:00:12,452 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 185 transitions, 2227 flow [2024-06-20 18:00:12,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:12,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:12,453 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] [2024-06-20 18:00:12,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 18:00:12,453 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:12,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:12,453 INFO L85 PathProgramCache]: Analyzing trace with hash 780887688, now seen corresponding path program 5 times [2024-06-20 18:00:12,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:12,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926933299] [2024-06-20 18:00:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:12,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:12,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:12,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926933299] [2024-06-20 18:00:12,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926933299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:12,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:12,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:12,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563696857] [2024-06-20 18:00:12,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:12,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:12,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:12,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:12,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 185 transitions, 2227 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:12,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:12,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:12,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:14,268 INFO L124 PetriNetUnfolderBase]: 7231/11123 cut-off events. [2024-06-20 18:00:14,268 INFO L125 PetriNetUnfolderBase]: For 219208/220200 co-relation queries the response was YES. [2024-06-20 18:00:14,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68401 conditions, 11123 events. 7231/11123 cut-off events. For 219208/220200 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 74021 event pairs, 2372 based on Foata normal form. 206/11065 useless extension candidates. Maximal degree in co-relation 68328. Up to 8656 conditions per place. [2024-06-20 18:00:14,439 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 153 selfloop transitions, 68 changer transitions 0/237 dead transitions. [2024-06-20 18:00:14,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 237 transitions, 3023 flow [2024-06-20 18:00:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:00:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:00:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-20 18:00:14,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-20 18:00:14,441 INFO L175 Difference]: Start difference. First operand has 151 places, 185 transitions, 2227 flow. Second operand 7 states and 226 transitions. [2024-06-20 18:00:14,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 237 transitions, 3023 flow [2024-06-20 18:00:15,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 237 transitions, 2880 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 18:00:15,061 INFO L231 Difference]: Finished difference. Result has 152 places, 187 transitions, 2288 flow [2024-06-20 18:00:15,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2288, PETRI_PLACES=152, PETRI_TRANSITIONS=187} [2024-06-20 18:00:15,063 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 100 predicate places. [2024-06-20 18:00:15,063 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 187 transitions, 2288 flow [2024-06-20 18:00:15,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:15,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:15,063 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] [2024-06-20 18:00:15,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 18:00:15,063 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:15,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash 788506248, now seen corresponding path program 6 times [2024-06-20 18:00:15,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:15,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989250433] [2024-06-20 18:00:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:15,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:15,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:15,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989250433] [2024-06-20 18:00:15,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989250433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:15,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:15,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:15,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528145842] [2024-06-20 18:00:15,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:15,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:15,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:15,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:15,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:15,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:15,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 187 transitions, 2288 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:15,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:15,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:15,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:17,302 INFO L124 PetriNetUnfolderBase]: 7669/11755 cut-off events. [2024-06-20 18:00:17,302 INFO L125 PetriNetUnfolderBase]: For 233392/234315 co-relation queries the response was YES. [2024-06-20 18:00:17,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72319 conditions, 11755 events. 7669/11755 cut-off events. For 233392/234315 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 78699 event pairs, 2599 based on Foata normal form. 145/11636 useless extension candidates. Maximal degree in co-relation 72246. Up to 10006 conditions per place. [2024-06-20 18:00:17,477 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 145 selfloop transitions, 66 changer transitions 0/227 dead transitions. [2024-06-20 18:00:17,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 227 transitions, 2886 flow [2024-06-20 18:00:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:00:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:00:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-20 18:00:17,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-20 18:00:17,479 INFO L175 Difference]: Start difference. First operand has 152 places, 187 transitions, 2288 flow. Second operand 7 states and 217 transitions. [2024-06-20 18:00:17,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 227 transitions, 2886 flow [2024-06-20 18:00:18,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 227 transitions, 2784 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 18:00:18,191 INFO L231 Difference]: Finished difference. Result has 156 places, 188 transitions, 2358 flow [2024-06-20 18:00:18,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2358, PETRI_PLACES=156, PETRI_TRANSITIONS=188} [2024-06-20 18:00:18,192 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 104 predicate places. [2024-06-20 18:00:18,192 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 188 transitions, 2358 flow [2024-06-20 18:00:18,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:18,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:18,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:18,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 18:00:18,193 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:18,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1046794218, now seen corresponding path program 7 times [2024-06-20 18:00:18,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:18,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914249305] [2024-06-20 18:00:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:18,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:18,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:18,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914249305] [2024-06-20 18:00:18,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914249305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:18,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:18,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:18,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676013473] [2024-06-20 18:00:18,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:18,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:18,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:18,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:18,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:18,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 188 transitions, 2358 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:18,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:18,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:18,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:20,408 INFO L124 PetriNetUnfolderBase]: 7875/12077 cut-off events. [2024-06-20 18:00:20,408 INFO L125 PetriNetUnfolderBase]: For 239949/240948 co-relation queries the response was YES. [2024-06-20 18:00:20,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73997 conditions, 12077 events. 7875/12077 cut-off events. For 239949/240948 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 81611 event pairs, 2702 based on Foata normal form. 164/11957 useless extension candidates. Maximal degree in co-relation 73922. Up to 10382 conditions per place. [2024-06-20 18:00:20,526 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 143 selfloop transitions, 67 changer transitions 0/226 dead transitions. [2024-06-20 18:00:20,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 226 transitions, 2954 flow [2024-06-20 18:00:20,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:00:20,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:00:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-20 18:00:20,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268221574344023 [2024-06-20 18:00:20,528 INFO L175 Difference]: Start difference. First operand has 156 places, 188 transitions, 2358 flow. Second operand 7 states and 215 transitions. [2024-06-20 18:00:20,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 226 transitions, 2954 flow [2024-06-20 18:00:21,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 2818 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 18:00:21,132 INFO L231 Difference]: Finished difference. Result has 158 places, 189 transitions, 2392 flow [2024-06-20 18:00:21,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2392, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2024-06-20 18:00:21,133 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-20 18:00:21,133 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 2392 flow [2024-06-20 18:00:21,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:21,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:21,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:21,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 18:00:21,134 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:21,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:21,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2101922504, now seen corresponding path program 8 times [2024-06-20 18:00:21,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:21,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399556569] [2024-06-20 18:00:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:21,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:21,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:21,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399556569] [2024-06-20 18:00:21,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399556569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:21,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:21,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:21,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263908529] [2024-06-20 18:00:21,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:21,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:21,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:21,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:21,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 2392 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:21,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:21,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:21,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:23,008 INFO L124 PetriNetUnfolderBase]: 7767/11857 cut-off events. [2024-06-20 18:00:23,009 INFO L125 PetriNetUnfolderBase]: For 234695/235677 co-relation queries the response was YES. [2024-06-20 18:00:23,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71723 conditions, 11857 events. 7767/11857 cut-off events. For 234695/235677 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 79421 event pairs, 2576 based on Foata normal form. 115/11683 useless extension candidates. Maximal degree in co-relation 71647. Up to 10085 conditions per place. [2024-06-20 18:00:23,166 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 156 selfloop transitions, 55 changer transitions 0/227 dead transitions. [2024-06-20 18:00:23,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 227 transitions, 2958 flow [2024-06-20 18:00:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:00:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:00:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-20 18:00:23,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-20 18:00:23,172 INFO L175 Difference]: Start difference. First operand has 158 places, 189 transitions, 2392 flow. Second operand 6 states and 195 transitions. [2024-06-20 18:00:23,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 227 transitions, 2958 flow [2024-06-20 18:00:23,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 2812 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 18:00:23,884 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 2368 flow [2024-06-20 18:00:23,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2368, PETRI_PLACES=159, PETRI_TRANSITIONS=189} [2024-06-20 18:00:23,885 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 107 predicate places. [2024-06-20 18:00:23,886 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 2368 flow [2024-06-20 18:00:23,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:23,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:23,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:23,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 18:00:23,886 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:23,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:23,887 INFO L85 PathProgramCache]: Analyzing trace with hash 958144138, now seen corresponding path program 1 times [2024-06-20 18:00:23,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:23,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110796001] [2024-06-20 18:00:23,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:23,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:24,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:24,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110796001] [2024-06-20 18:00:24,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110796001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:24,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:24,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:24,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227256842] [2024-06-20 18:00:24,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:24,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:24,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:24,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:24,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:24,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:24,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 189 transitions, 2368 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:24,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:24,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:24,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:25,930 INFO L124 PetriNetUnfolderBase]: 8279/12753 cut-off events. [2024-06-20 18:00:25,930 INFO L125 PetriNetUnfolderBase]: For 254658/255565 co-relation queries the response was YES. [2024-06-20 18:00:26,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77210 conditions, 12753 events. 8279/12753 cut-off events. For 254658/255565 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 87074 event pairs, 2393 based on Foata normal form. 119/12616 useless extension candidates. Maximal degree in co-relation 77133. Up to 6224 conditions per place. [2024-06-20 18:00:26,086 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 149 selfloop transitions, 82 changer transitions 0/247 dead transitions. [2024-06-20 18:00:26,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 247 transitions, 3250 flow [2024-06-20 18:00:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:00:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:00:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-20 18:00:26,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705539358600583 [2024-06-20 18:00:26,088 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 2368 flow. Second operand 7 states and 230 transitions. [2024-06-20 18:00:26,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 247 transitions, 3250 flow [2024-06-20 18:00:26,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 247 transitions, 3128 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 18:00:26,864 INFO L231 Difference]: Finished difference. Result has 161 places, 191 transitions, 2478 flow [2024-06-20 18:00:26,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2478, PETRI_PLACES=161, PETRI_TRANSITIONS=191} [2024-06-20 18:00:26,865 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 109 predicate places. [2024-06-20 18:00:26,865 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 191 transitions, 2478 flow [2024-06-20 18:00:26,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:26,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:26,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:26,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 18:00:26,866 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:26,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash 264764882, now seen corresponding path program 2 times [2024-06-20 18:00:26,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:26,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148324849] [2024-06-20 18:00:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:26,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:27,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:27,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148324849] [2024-06-20 18:00:27,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148324849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:27,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:27,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:27,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961304323] [2024-06-20 18:00:27,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:27,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:27,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:27,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:27,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:27,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 191 transitions, 2478 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:27,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:27,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:27,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:28,707 INFO L124 PetriNetUnfolderBase]: 8469/13073 cut-off events. [2024-06-20 18:00:28,707 INFO L125 PetriNetUnfolderBase]: For 273831/274752 co-relation queries the response was YES. [2024-06-20 18:00:28,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79996 conditions, 13073 events. 8469/13073 cut-off events. For 273831/274752 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 89974 event pairs, 2366 based on Foata normal form. 115/12912 useless extension candidates. Maximal degree in co-relation 79918. Up to 6258 conditions per place. [2024-06-20 18:00:28,863 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 147 selfloop transitions, 83 changer transitions 0/246 dead transitions. [2024-06-20 18:00:28,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 246 transitions, 3338 flow [2024-06-20 18:00:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:00:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:00:28,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-20 18:00:28,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647230320699709 [2024-06-20 18:00:28,865 INFO L175 Difference]: Start difference. First operand has 161 places, 191 transitions, 2478 flow. Second operand 7 states and 228 transitions. [2024-06-20 18:00:28,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 246 transitions, 3338 flow [2024-06-20 18:00:29,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 246 transitions, 3146 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 18:00:29,980 INFO L231 Difference]: Finished difference. Result has 164 places, 192 transitions, 2490 flow [2024-06-20 18:00:29,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2490, PETRI_PLACES=164, PETRI_TRANSITIONS=192} [2024-06-20 18:00:29,981 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 112 predicate places. [2024-06-20 18:00:29,981 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 192 transitions, 2490 flow [2024-06-20 18:00:29,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:29,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:29,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:29,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 18:00:29,982 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:29,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash 169075466, now seen corresponding path program 3 times [2024-06-20 18:00:29,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:29,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979874307] [2024-06-20 18:00:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:29,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:30,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:30,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979874307] [2024-06-20 18:00:30,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979874307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:30,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:30,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:30,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069196602] [2024-06-20 18:00:30,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:30,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:30,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:30,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:30,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:30,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 192 transitions, 2490 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:30,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:30,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:30,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:31,908 INFO L124 PetriNetUnfolderBase]: 8651/13439 cut-off events. [2024-06-20 18:00:31,909 INFO L125 PetriNetUnfolderBase]: For 290645/291664 co-relation queries the response was YES. [2024-06-20 18:00:31,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81881 conditions, 13439 events. 8651/13439 cut-off events. For 290645/291664 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 94244 event pairs, 3017 based on Foata normal form. 156/13245 useless extension candidates. Maximal degree in co-relation 81802. Up to 10030 conditions per place. [2024-06-20 18:00:32,043 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 150 selfloop transitions, 71 changer transitions 0/237 dead transitions. [2024-06-20 18:00:32,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 237 transitions, 3172 flow [2024-06-20 18:00:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:00:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:00:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-20 18:00:32,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641399416909621 [2024-06-20 18:00:32,045 INFO L175 Difference]: Start difference. First operand has 164 places, 192 transitions, 2490 flow. Second operand 7 states and 220 transitions. [2024-06-20 18:00:32,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 237 transitions, 3172 flow [2024-06-20 18:00:32,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 237 transitions, 3040 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 18:00:32,806 INFO L231 Difference]: Finished difference. Result has 167 places, 193 transitions, 2534 flow [2024-06-20 18:00:32,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2359, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2534, PETRI_PLACES=167, PETRI_TRANSITIONS=193} [2024-06-20 18:00:32,807 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 115 predicate places. [2024-06-20 18:00:32,807 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 193 transitions, 2534 flow [2024-06-20 18:00:32,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:32,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:32,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:32,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 18:00:32,807 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:32,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1611544722, now seen corresponding path program 4 times [2024-06-20 18:00:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:32,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084133611] [2024-06-20 18:00:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:32,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:33,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:33,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084133611] [2024-06-20 18:00:33,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084133611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:33,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:33,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:33,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100851443] [2024-06-20 18:00:33,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:33,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:33,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:33,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:33,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:33,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:33,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 193 transitions, 2534 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:33,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:33,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:33,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:34,765 INFO L124 PetriNetUnfolderBase]: 8597/13253 cut-off events. [2024-06-20 18:00:34,766 INFO L125 PetriNetUnfolderBase]: For 283362/284361 co-relation queries the response was YES. [2024-06-20 18:00:34,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79552 conditions, 13253 events. 8597/13253 cut-off events. For 283362/284361 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 91508 event pairs, 2427 based on Foata normal form. 89/12976 useless extension candidates. Maximal degree in co-relation 79472. Up to 9807 conditions per place. [2024-06-20 18:00:34,943 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 158 selfloop transitions, 64 changer transitions 0/238 dead transitions. [2024-06-20 18:00:34,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 238 transitions, 3186 flow [2024-06-20 18:00:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:00:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:00:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-20 18:00:34,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-06-20 18:00:34,944 INFO L175 Difference]: Start difference. First operand has 167 places, 193 transitions, 2534 flow. Second operand 6 states and 200 transitions. [2024-06-20 18:00:34,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 238 transitions, 3186 flow [2024-06-20 18:00:35,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 238 transitions, 3032 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 18:00:35,915 INFO L231 Difference]: Finished difference. Result has 168 places, 193 transitions, 2517 flow [2024-06-20 18:00:35,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2517, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2024-06-20 18:00:35,916 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 116 predicate places. [2024-06-20 18:00:35,916 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 2517 flow [2024-06-20 18:00:35,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:35,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:35,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:35,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 18:00:35,917 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:35,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1325105589, now seen corresponding path program 1 times [2024-06-20 18:00:35,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:35,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078491142] [2024-06-20 18:00:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:35,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:36,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:36,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078491142] [2024-06-20 18:00:36,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078491142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:36,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:36,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:00:36,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967082663] [2024-06-20 18:00:36,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:36,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:00:36,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:36,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:00:36,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:00:36,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:00:36,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 2517 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:36,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:36,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:00:36,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:38,093 INFO L124 PetriNetUnfolderBase]: 9585/14507 cut-off events. [2024-06-20 18:00:38,094 INFO L125 PetriNetUnfolderBase]: For 257278/257286 co-relation queries the response was YES. [2024-06-20 18:00:38,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84200 conditions, 14507 events. 9585/14507 cut-off events. For 257278/257286 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 97834 event pairs, 3637 based on Foata normal form. 7/14509 useless extension candidates. Maximal degree in co-relation 84119. Up to 13575 conditions per place. [2024-06-20 18:00:38,264 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 178 selfloop transitions, 39 changer transitions 0/226 dead transitions. [2024-06-20 18:00:38,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 226 transitions, 3225 flow [2024-06-20 18:00:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:00:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:00:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-20 18:00:38,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565597667638484 [2024-06-20 18:00:38,265 INFO L175 Difference]: Start difference. First operand has 168 places, 193 transitions, 2517 flow. Second operand 7 states and 194 transitions. [2024-06-20 18:00:38,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 226 transitions, 3225 flow [2024-06-20 18:00:38,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 226 transitions, 3049 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 18:00:38,977 INFO L231 Difference]: Finished difference. Result has 170 places, 205 transitions, 2611 flow [2024-06-20 18:00:38,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2611, PETRI_PLACES=170, PETRI_TRANSITIONS=205} [2024-06-20 18:00:38,978 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-20 18:00:38,978 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 205 transitions, 2611 flow [2024-06-20 18:00:38,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:38,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:38,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:38,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 18:00:38,979 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:38,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:38,979 INFO L85 PathProgramCache]: Analyzing trace with hash 100802063, now seen corresponding path program 2 times [2024-06-20 18:00:38,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:38,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408810190] [2024-06-20 18:00:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:38,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:39,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:39,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408810190] [2024-06-20 18:00:39,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408810190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:39,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:39,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:00:39,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815002367] [2024-06-20 18:00:39,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:39,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:00:39,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:39,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:00:39,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:00:39,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:00:39,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 205 transitions, 2611 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:39,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:39,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:00:39,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:41,128 INFO L124 PetriNetUnfolderBase]: 9581/14472 cut-off events. [2024-06-20 18:00:41,129 INFO L125 PetriNetUnfolderBase]: For 265253/265271 co-relation queries the response was YES. [2024-06-20 18:00:41,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84958 conditions, 14472 events. 9581/14472 cut-off events. For 265253/265271 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 97289 event pairs, 3556 based on Foata normal form. 17/14480 useless extension candidates. Maximal degree in co-relation 84875. Up to 13571 conditions per place. [2024-06-20 18:00:41,349 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 171 selfloop transitions, 37 changer transitions 0/217 dead transitions. [2024-06-20 18:00:41,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 217 transitions, 3057 flow [2024-06-20 18:00:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:00:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:00:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-20 18:00:41,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2024-06-20 18:00:41,351 INFO L175 Difference]: Start difference. First operand has 170 places, 205 transitions, 2611 flow. Second operand 5 states and 143 transitions. [2024-06-20 18:00:41,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 217 transitions, 3057 flow [2024-06-20 18:00:42,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 217 transitions, 2932 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-20 18:00:42,171 INFO L231 Difference]: Finished difference. Result has 173 places, 205 transitions, 2572 flow [2024-06-20 18:00:42,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2572, PETRI_PLACES=173, PETRI_TRANSITIONS=205} [2024-06-20 18:00:42,171 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-20 18:00:42,171 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 205 transitions, 2572 flow [2024-06-20 18:00:42,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:42,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:42,172 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] [2024-06-20 18:00:42,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 18:00:42,172 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:42,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:42,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1312172171, now seen corresponding path program 1 times [2024-06-20 18:00:42,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:42,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527655241] [2024-06-20 18:00:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:42,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:42,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:42,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527655241] [2024-06-20 18:00:42,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527655241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:42,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:42,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:00:42,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575941344] [2024-06-20 18:00:42,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:42,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:00:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:00:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:00:42,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 18:00:42,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 205 transitions, 2572 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:42,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:42,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 18:00:42,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:44,631 INFO L124 PetriNetUnfolderBase]: 9249/13961 cut-off events. [2024-06-20 18:00:44,631 INFO L125 PetriNetUnfolderBase]: For 311060/311213 co-relation queries the response was YES. [2024-06-20 18:00:44,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83465 conditions, 13961 events. 9249/13961 cut-off events. For 311060/311213 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 94598 event pairs, 3350 based on Foata normal form. 87/13575 useless extension candidates. Maximal degree in co-relation 83381. Up to 12410 conditions per place. [2024-06-20 18:00:44,936 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 130 selfloop transitions, 52 changer transitions 0/226 dead transitions. [2024-06-20 18:00:44,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 226 transitions, 3052 flow [2024-06-20 18:00:44,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:00:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:00:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-20 18:00:44,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-20 18:00:44,938 INFO L175 Difference]: Start difference. First operand has 173 places, 205 transitions, 2572 flow. Second operand 5 states and 155 transitions. [2024-06-20 18:00:44,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 226 transitions, 3052 flow [2024-06-20 18:00:45,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 226 transitions, 2971 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 18:00:45,723 INFO L231 Difference]: Finished difference. Result has 173 places, 208 transitions, 2655 flow [2024-06-20 18:00:45,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2491, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2655, PETRI_PLACES=173, PETRI_TRANSITIONS=208} [2024-06-20 18:00:45,725 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-20 18:00:45,725 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 208 transitions, 2655 flow [2024-06-20 18:00:45,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:45,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:45,725 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] [2024-06-20 18:00:45,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 18:00:45,726 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:45,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:45,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1090773493, now seen corresponding path program 3 times [2024-06-20 18:00:45,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:45,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945125805] [2024-06-20 18:00:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:45,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:46,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:46,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945125805] [2024-06-20 18:00:46,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945125805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:46,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:46,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:46,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410223451] [2024-06-20 18:00:46,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:46,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:46,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:46,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:46,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-06-20 18:00:46,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 208 transitions, 2655 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:46,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:46,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-06-20 18:00:46,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:48,009 INFO L124 PetriNetUnfolderBase]: 9916/14975 cut-off events. [2024-06-20 18:00:48,010 INFO L125 PetriNetUnfolderBase]: For 276143/276143 co-relation queries the response was YES. [2024-06-20 18:00:48,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89490 conditions, 14975 events. 9916/14975 cut-off events. For 276143/276143 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 100963 event pairs, 3694 based on Foata normal form. 1/14972 useless extension candidates. Maximal degree in co-relation 89405. Up to 14020 conditions per place. [2024-06-20 18:00:48,276 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 199 selfloop transitions, 51 changer transitions 0/258 dead transitions. [2024-06-20 18:00:48,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 258 transitions, 3491 flow [2024-06-20 18:00:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:00:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:00:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-20 18:00:48,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5532879818594104 [2024-06-20 18:00:48,278 INFO L175 Difference]: Start difference. First operand has 173 places, 208 transitions, 2655 flow. Second operand 9 states and 244 transitions. [2024-06-20 18:00:48,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 258 transitions, 3491 flow [2024-06-20 18:00:49,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 258 transitions, 3383 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 18:00:49,359 INFO L231 Difference]: Finished difference. Result has 180 places, 220 transitions, 2857 flow [2024-06-20 18:00:49,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2549, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2857, PETRI_PLACES=180, PETRI_TRANSITIONS=220} [2024-06-20 18:00:49,359 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 128 predicate places. [2024-06-20 18:00:49,360 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 220 transitions, 2857 flow [2024-06-20 18:00:49,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:49,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:49,360 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] [2024-06-20 18:00:49,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 18:00:49,360 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:49,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:49,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1227040585, now seen corresponding path program 4 times [2024-06-20 18:00:49,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:49,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527734092] [2024-06-20 18:00:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:49,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:49,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:49,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527734092] [2024-06-20 18:00:49,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527734092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:49,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:49,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:49,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364391568] [2024-06-20 18:00:49,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:49,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:49,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:49,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:49,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:49,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-06-20 18:00:49,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 220 transitions, 2857 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:49,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:49,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-06-20 18:00:49,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:51,644 INFO L124 PetriNetUnfolderBase]: 9923/14958 cut-off events. [2024-06-20 18:00:51,644 INFO L125 PetriNetUnfolderBase]: For 279762/279762 co-relation queries the response was YES. [2024-06-20 18:00:51,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89502 conditions, 14958 events. 9923/14958 cut-off events. For 279762/279762 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 100595 event pairs, 3601 based on Foata normal form. 1/14954 useless extension candidates. Maximal degree in co-relation 89415. Up to 14028 conditions per place. [2024-06-20 18:00:51,902 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 187 selfloop transitions, 55 changer transitions 0/250 dead transitions. [2024-06-20 18:00:51,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 250 transitions, 3543 flow [2024-06-20 18:00:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:00:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:00:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-20 18:00:51,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260770975056689 [2024-06-20 18:00:51,904 INFO L175 Difference]: Start difference. First operand has 180 places, 220 transitions, 2857 flow. Second operand 9 states and 232 transitions. [2024-06-20 18:00:51,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 250 transitions, 3543 flow [2024-06-20 18:00:52,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 250 transitions, 3380 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-20 18:00:52,917 INFO L231 Difference]: Finished difference. Result has 184 places, 224 transitions, 2883 flow [2024-06-20 18:00:52,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2883, PETRI_PLACES=184, PETRI_TRANSITIONS=224} [2024-06-20 18:00:52,918 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 132 predicate places. [2024-06-20 18:00:52,918 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 224 transitions, 2883 flow [2024-06-20 18:00:52,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:52,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:52,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:52,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 18:00:52,919 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:52,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash 679443797, now seen corresponding path program 5 times [2024-06-20 18:00:52,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:52,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696609972] [2024-06-20 18:00:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:53,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:53,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696609972] [2024-06-20 18:00:53,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696609972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:53,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:53,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:53,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379045519] [2024-06-20 18:00:53,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:53,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:53,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:53,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-06-20 18:00:53,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 224 transitions, 2883 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:53,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:53,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-06-20 18:00:53,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:55,227 INFO L124 PetriNetUnfolderBase]: 9919/14953 cut-off events. [2024-06-20 18:00:55,227 INFO L125 PetriNetUnfolderBase]: For 279071/279071 co-relation queries the response was YES. [2024-06-20 18:00:55,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88150 conditions, 14953 events. 9919/14953 cut-off events. For 279071/279071 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 100580 event pairs, 3601 based on Foata normal form. 1/14949 useless extension candidates. Maximal degree in co-relation 88062. Up to 14024 conditions per place. [2024-06-20 18:00:55,406 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 187 selfloop transitions, 53 changer transitions 0/248 dead transitions. [2024-06-20 18:00:55,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 248 transitions, 3423 flow [2024-06-20 18:00:55,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:00:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:00:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 18:00:55,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5382653061224489 [2024-06-20 18:00:55,410 INFO L175 Difference]: Start difference. First operand has 184 places, 224 transitions, 2883 flow. Second operand 8 states and 211 transitions. [2024-06-20 18:00:55,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 248 transitions, 3423 flow [2024-06-20 18:00:56,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 248 transitions, 3259 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 18:00:56,326 INFO L231 Difference]: Finished difference. Result has 188 places, 224 transitions, 2832 flow [2024-06-20 18:00:56,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2719, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2832, PETRI_PLACES=188, PETRI_TRANSITIONS=224} [2024-06-20 18:00:56,327 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2024-06-20 18:00:56,327 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 224 transitions, 2832 flow [2024-06-20 18:00:56,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:56,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:56,328 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] [2024-06-20 18:00:56,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 18:00:56,328 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:56,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 679456693, now seen corresponding path program 2 times [2024-06-20 18:00:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:56,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622615714] [2024-06-20 18:00:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:56,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:56,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:56,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622615714] [2024-06-20 18:00:56,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622615714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:56,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:56,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:56,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788980258] [2024-06-20 18:00:56,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:56,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:56,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:56,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:56,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:56,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:56,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 224 transitions, 2832 flow. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:56,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:56,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:56,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:00:58,467 INFO L124 PetriNetUnfolderBase]: 9343/14131 cut-off events. [2024-06-20 18:00:58,467 INFO L125 PetriNetUnfolderBase]: For 311177/311308 co-relation queries the response was YES. [2024-06-20 18:00:58,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85014 conditions, 14131 events. 9343/14131 cut-off events. For 311177/311308 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 96080 event pairs, 3345 based on Foata normal form. 43/13714 useless extension candidates. Maximal degree in co-relation 84925. Up to 12777 conditions per place. [2024-06-20 18:00:58,691 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 163 selfloop transitions, 40 changer transitions 0/254 dead transitions. [2024-06-20 18:00:58,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 254 transitions, 3354 flow [2024-06-20 18:00:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:00:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:00:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-20 18:00:58,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663265306122449 [2024-06-20 18:00:58,693 INFO L175 Difference]: Start difference. First operand has 188 places, 224 transitions, 2832 flow. Second operand 8 states and 222 transitions. [2024-06-20 18:00:58,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 254 transitions, 3354 flow [2024-06-20 18:00:59,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 254 transitions, 3238 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 18:00:59,400 INFO L231 Difference]: Finished difference. Result has 191 places, 226 transitions, 2831 flow [2024-06-20 18:00:59,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2831, PETRI_PLACES=191, PETRI_TRANSITIONS=226} [2024-06-20 18:00:59,401 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 139 predicate places. [2024-06-20 18:00:59,401 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 226 transitions, 2831 flow [2024-06-20 18:00:59,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:59,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:00:59,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:00:59,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 18:00:59,402 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:00:59,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:00:59,402 INFO L85 PathProgramCache]: Analyzing trace with hash 697550773, now seen corresponding path program 3 times [2024-06-20 18:00:59,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:00:59,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432821553] [2024-06-20 18:00:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:00:59,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:00:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:00:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:00:59,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:00:59,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432821553] [2024-06-20 18:00:59,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432821553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:00:59,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:00:59,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:00:59,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260062394] [2024-06-20 18:00:59,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:00:59,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:00:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:00:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:00:59,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:00:59,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:00:59,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 226 transitions, 2831 flow. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:00:59,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:00:59,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:00:59,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:01,489 INFO L124 PetriNetUnfolderBase]: 9360/14170 cut-off events. [2024-06-20 18:01:01,490 INFO L125 PetriNetUnfolderBase]: For 318180/318299 co-relation queries the response was YES. [2024-06-20 18:01:01,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86153 conditions, 14170 events. 9360/14170 cut-off events. For 318180/318299 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 96453 event pairs, 3337 based on Foata normal form. 41/13763 useless extension candidates. Maximal degree in co-relation 86064. Up to 12664 conditions per place. [2024-06-20 18:01:01,679 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 162 selfloop transitions, 47 changer transitions 0/260 dead transitions. [2024-06-20 18:01:01,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 260 transitions, 3403 flow [2024-06-20 18:01:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:01:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:01:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-20 18:01:01,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 18:01:01,680 INFO L175 Difference]: Start difference. First operand has 191 places, 226 transitions, 2831 flow. Second operand 8 states and 224 transitions. [2024-06-20 18:01:01,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 260 transitions, 3403 flow [2024-06-20 18:01:02,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 260 transitions, 3318 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 18:01:02,574 INFO L231 Difference]: Finished difference. Result has 194 places, 229 transitions, 2908 flow [2024-06-20 18:01:02,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2908, PETRI_PLACES=194, PETRI_TRANSITIONS=229} [2024-06-20 18:01:02,575 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 142 predicate places. [2024-06-20 18:01:02,575 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 229 transitions, 2908 flow [2024-06-20 18:01:02,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:02,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:02,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:02,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 18:01:02,576 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:02,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:02,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1082210549, now seen corresponding path program 1 times [2024-06-20 18:01:02,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:02,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335954230] [2024-06-20 18:01:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:02,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:02,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335954230] [2024-06-20 18:01:02,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335954230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:02,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:02,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:01:02,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889495106] [2024-06-20 18:01:02,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:02,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:01:02,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:02,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:01:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:01:02,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:01:02,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 229 transitions, 2908 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:02,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:02,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:01:02,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:04,741 INFO L124 PetriNetUnfolderBase]: 10126/15274 cut-off events. [2024-06-20 18:01:04,741 INFO L125 PetriNetUnfolderBase]: For 325435/325435 co-relation queries the response was YES. [2024-06-20 18:01:04,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92931 conditions, 15274 events. 10126/15274 cut-off events. For 325435/325435 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 102956 event pairs, 3663 based on Foata normal form. 6/15276 useless extension candidates. Maximal degree in co-relation 92841. Up to 14266 conditions per place. [2024-06-20 18:01:04,951 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 234 selfloop transitions, 25 changer transitions 0/268 dead transitions. [2024-06-20 18:01:04,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 268 transitions, 3711 flow [2024-06-20 18:01:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:01:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:01:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-20 18:01:04,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-20 18:01:04,953 INFO L175 Difference]: Start difference. First operand has 194 places, 229 transitions, 2908 flow. Second operand 6 states and 179 transitions. [2024-06-20 18:01:04,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 268 transitions, 3711 flow [2024-06-20 18:01:06,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 268 transitions, 3619 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 18:01:06,229 INFO L231 Difference]: Finished difference. Result has 196 places, 235 transitions, 2985 flow [2024-06-20 18:01:06,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2816, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2985, PETRI_PLACES=196, PETRI_TRANSITIONS=235} [2024-06-20 18:01:06,230 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 144 predicate places. [2024-06-20 18:01:06,230 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 235 transitions, 2985 flow [2024-06-20 18:01:06,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:06,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:06,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:06,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 18:01:06,231 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:06,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash -791874475, now seen corresponding path program 2 times [2024-06-20 18:01:06,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:06,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655733019] [2024-06-20 18:01:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:06,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:06,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655733019] [2024-06-20 18:01:06,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655733019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:06,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:06,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:01:06,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060625511] [2024-06-20 18:01:06,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:01:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:01:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:01:06,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:01:06,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 235 transitions, 2985 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:06,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:06,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:01:06,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:08,349 INFO L124 PetriNetUnfolderBase]: 10170/15314 cut-off events. [2024-06-20 18:01:08,349 INFO L125 PetriNetUnfolderBase]: For 342317/342317 co-relation queries the response was YES. [2024-06-20 18:01:08,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94010 conditions, 15314 events. 10170/15314 cut-off events. For 342317/342317 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103252 event pairs, 3634 based on Foata normal form. 8/15318 useless extension candidates. Maximal degree in co-relation 93918. Up to 14402 conditions per place. [2024-06-20 18:01:08,559 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 229 selfloop transitions, 22 changer transitions 0/260 dead transitions. [2024-06-20 18:01:08,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 260 transitions, 3605 flow [2024-06-20 18:01:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:01:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:01:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-20 18:01:08,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-20 18:01:08,563 INFO L175 Difference]: Start difference. First operand has 196 places, 235 transitions, 2985 flow. Second operand 6 states and 170 transitions. [2024-06-20 18:01:08,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 260 transitions, 3605 flow [2024-06-20 18:01:09,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 260 transitions, 3556 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-20 18:01:09,981 INFO L231 Difference]: Finished difference. Result has 201 places, 237 transitions, 3028 flow [2024-06-20 18:01:09,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3028, PETRI_PLACES=201, PETRI_TRANSITIONS=237} [2024-06-20 18:01:09,981 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 149 predicate places. [2024-06-20 18:01:09,981 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 237 transitions, 3028 flow [2024-06-20 18:01:09,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:09,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:09,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:09,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 18:01:09,982 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:09,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:09,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1085070485, now seen corresponding path program 1 times [2024-06-20 18:01:09,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:09,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52888036] [2024-06-20 18:01:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:09,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:10,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:10,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52888036] [2024-06-20 18:01:10,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52888036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:10,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:10,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:01:10,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764843622] [2024-06-20 18:01:10,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:10,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:01:10,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:10,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:01:10,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:01:10,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:01:10,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 237 transitions, 3028 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:10,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:10,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:01:10,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:12,161 INFO L124 PetriNetUnfolderBase]: 10188/15339 cut-off events. [2024-06-20 18:01:12,161 INFO L125 PetriNetUnfolderBase]: For 348727/348729 co-relation queries the response was YES. [2024-06-20 18:01:12,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94400 conditions, 15339 events. 10188/15339 cut-off events. For 348727/348729 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103440 event pairs, 3624 based on Foata normal form. 3/15337 useless extension candidates. Maximal degree in co-relation 94305. Up to 14410 conditions per place. [2024-06-20 18:01:12,361 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 229 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-20 18:01:12,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 277 transitions, 4000 flow [2024-06-20 18:01:12,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:01:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:01:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-20 18:01:12,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-20 18:01:12,363 INFO L175 Difference]: Start difference. First operand has 201 places, 237 transitions, 3028 flow. Second operand 6 states and 176 transitions. [2024-06-20 18:01:12,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 277 transitions, 4000 flow [2024-06-20 18:01:13,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 277 transitions, 3950 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 18:01:13,896 INFO L231 Difference]: Finished difference. Result has 205 places, 252 transitions, 3313 flow [2024-06-20 18:01:13,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3313, PETRI_PLACES=205, PETRI_TRANSITIONS=252} [2024-06-20 18:01:13,896 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 153 predicate places. [2024-06-20 18:01:13,897 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 252 transitions, 3313 flow [2024-06-20 18:01:13,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:13,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:13,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:13,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 18:01:13,898 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:13,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:13,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1224947107, now seen corresponding path program 2 times [2024-06-20 18:01:13,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:13,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672228338] [2024-06-20 18:01:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:13,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:14,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672228338] [2024-06-20 18:01:14,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672228338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:14,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:14,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:01:14,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554399528] [2024-06-20 18:01:14,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:14,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:01:14,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:01:14,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:01:14,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:01:14,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 252 transitions, 3313 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:14,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:14,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:01:14,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:16,198 INFO L124 PetriNetUnfolderBase]: 10206/15364 cut-off events. [2024-06-20 18:01:16,198 INFO L125 PetriNetUnfolderBase]: For 374099/374101 co-relation queries the response was YES. [2024-06-20 18:01:16,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97368 conditions, 15364 events. 10206/15364 cut-off events. For 374099/374101 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103471 event pairs, 3624 based on Foata normal form. 3/15362 useless extension candidates. Maximal degree in co-relation 97270. Up to 14430 conditions per place. [2024-06-20 18:01:16,372 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 226 selfloop transitions, 47 changer transitions 0/282 dead transitions. [2024-06-20 18:01:16,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 282 transitions, 4220 flow [2024-06-20 18:01:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:01:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:01:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-20 18:01:16,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-20 18:01:16,373 INFO L175 Difference]: Start difference. First operand has 205 places, 252 transitions, 3313 flow. Second operand 6 states and 173 transitions. [2024-06-20 18:01:16,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 282 transitions, 4220 flow [2024-06-20 18:01:17,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 282 transitions, 4103 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-20 18:01:17,716 INFO L231 Difference]: Finished difference. Result has 211 places, 261 transitions, 3470 flow [2024-06-20 18:01:17,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3224, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3470, PETRI_PLACES=211, PETRI_TRANSITIONS=261} [2024-06-20 18:01:17,718 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 159 predicate places. [2024-06-20 18:01:17,718 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 261 transitions, 3470 flow [2024-06-20 18:01:17,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:17,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:17,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:17,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 18:01:17,718 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:17,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1227032649, now seen corresponding path program 3 times [2024-06-20 18:01:17,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:17,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51127704] [2024-06-20 18:01:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:17,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:18,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:18,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51127704] [2024-06-20 18:01:18,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51127704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:18,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:18,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:01:18,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926326676] [2024-06-20 18:01:18,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:18,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:01:18,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:01:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:01:18,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:01:18,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 261 transitions, 3470 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:18,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:18,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:01:18,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:20,114 INFO L124 PetriNetUnfolderBase]: 10180/15326 cut-off events. [2024-06-20 18:01:20,115 INFO L125 PetriNetUnfolderBase]: For 385385/385385 co-relation queries the response was YES. [2024-06-20 18:01:20,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97210 conditions, 15326 events. 10180/15326 cut-off events. For 385385/385385 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103262 event pairs, 3617 based on Foata normal form. 8/15329 useless extension candidates. Maximal degree in co-relation 97109. Up to 14414 conditions per place. [2024-06-20 18:01:20,399 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 248 selfloop transitions, 22 changer transitions 0/279 dead transitions. [2024-06-20 18:01:20,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 279 transitions, 4091 flow [2024-06-20 18:01:20,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:01:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:01:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-20 18:01:20,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-20 18:01:20,400 INFO L175 Difference]: Start difference. First operand has 211 places, 261 transitions, 3470 flow. Second operand 6 states and 164 transitions. [2024-06-20 18:01:20,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 279 transitions, 4091 flow [2024-06-20 18:01:22,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 279 transitions, 4001 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 18:01:22,064 INFO L231 Difference]: Finished difference. Result has 215 places, 262 transitions, 3445 flow [2024-06-20 18:01:22,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3445, PETRI_PLACES=215, PETRI_TRANSITIONS=262} [2024-06-20 18:01:22,065 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 163 predicate places. [2024-06-20 18:01:22,065 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 262 transitions, 3445 flow [2024-06-20 18:01:22,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:22,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:22,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:22,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 18:01:22,066 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:22,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash -516655115, now seen corresponding path program 3 times [2024-06-20 18:01:22,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:22,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919005255] [2024-06-20 18:01:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:22,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:22,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:22,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919005255] [2024-06-20 18:01:22,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919005255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:22,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:22,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:01:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782060838] [2024-06-20 18:01:22,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:22,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:01:22,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:22,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:01:22,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:01:22,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:01:22,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 262 transitions, 3445 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:22,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:22,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:01:22,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:24,957 INFO L124 PetriNetUnfolderBase]: 10176/15325 cut-off events. [2024-06-20 18:01:24,958 INFO L125 PetriNetUnfolderBase]: For 390313/390315 co-relation queries the response was YES. [2024-06-20 18:01:25,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97342 conditions, 15325 events. 10176/15325 cut-off events. For 390313/390315 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103314 event pairs, 3616 based on Foata normal form. 3/15323 useless extension candidates. Maximal degree in co-relation 97240. Up to 14411 conditions per place. [2024-06-20 18:01:25,149 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 237 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-20 18:01:25,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 281 transitions, 4121 flow [2024-06-20 18:01:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:01:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:01:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-20 18:01:25,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 18:01:25,151 INFO L175 Difference]: Start difference. First operand has 215 places, 262 transitions, 3445 flow. Second operand 5 states and 150 transitions. [2024-06-20 18:01:25,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 281 transitions, 4121 flow [2024-06-20 18:01:26,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 281 transitions, 4047 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 18:01:26,889 INFO L231 Difference]: Finished difference. Result has 216 places, 262 transitions, 3453 flow [2024-06-20 18:01:26,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3453, PETRI_PLACES=216, PETRI_TRANSITIONS=262} [2024-06-20 18:01:26,890 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 164 predicate places. [2024-06-20 18:01:26,890 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 262 transitions, 3453 flow [2024-06-20 18:01:26,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:26,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:26,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:26,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 18:01:26,891 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:26,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash -346065129, now seen corresponding path program 4 times [2024-06-20 18:01:26,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238846251] [2024-06-20 18:01:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:26,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:27,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:27,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238846251] [2024-06-20 18:01:27,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238846251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:27,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:27,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:01:27,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770795573] [2024-06-20 18:01:27,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:27,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:01:27,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:27,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:01:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:01:27,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:01:27,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 262 transitions, 3453 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:27,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:27,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:01:27,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:30,444 INFO L124 PetriNetUnfolderBase]: 10172/15322 cut-off events. [2024-06-20 18:01:30,444 INFO L125 PetriNetUnfolderBase]: For 401124/401126 co-relation queries the response was YES. [2024-06-20 18:01:30,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97509 conditions, 15322 events. 10172/15322 cut-off events. For 401124/401126 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103250 event pairs, 3614 based on Foata normal form. 3/15322 useless extension candidates. Maximal degree in co-relation 97406. Up to 14407 conditions per place. [2024-06-20 18:01:30,680 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 236 selfloop transitions, 39 changer transitions 0/284 dead transitions. [2024-06-20 18:01:30,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 284 transitions, 4087 flow [2024-06-20 18:01:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:01:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:01:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-20 18:01:30,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626822157434402 [2024-06-20 18:01:30,682 INFO L175 Difference]: Start difference. First operand has 216 places, 262 transitions, 3453 flow. Second operand 7 states and 193 transitions. [2024-06-20 18:01:30,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 284 transitions, 4087 flow [2024-06-20 18:01:32,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 284 transitions, 3966 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 18:01:32,711 INFO L231 Difference]: Finished difference. Result has 219 places, 264 transitions, 3456 flow [2024-06-20 18:01:32,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3348, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3456, PETRI_PLACES=219, PETRI_TRANSITIONS=264} [2024-06-20 18:01:32,711 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 167 predicate places. [2024-06-20 18:01:32,711 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 264 transitions, 3456 flow [2024-06-20 18:01:32,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:32,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:32,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:32,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 18:01:32,712 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:32,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1356135023, now seen corresponding path program 5 times [2024-06-20 18:01:32,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:32,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338975121] [2024-06-20 18:01:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:32,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:33,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338975121] [2024-06-20 18:01:33,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338975121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:33,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:33,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:01:33,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092678122] [2024-06-20 18:01:33,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:33,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:01:33,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:01:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:01:33,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:01:33,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 264 transitions, 3456 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:33,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:33,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:01:33,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:36,035 INFO L124 PetriNetUnfolderBase]: 10168/15312 cut-off events. [2024-06-20 18:01:36,036 INFO L125 PetriNetUnfolderBase]: For 413028/413030 co-relation queries the response was YES. [2024-06-20 18:01:36,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97684 conditions, 15312 events. 10168/15312 cut-off events. For 413028/413030 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103227 event pairs, 3629 based on Foata normal form. 3/15310 useless extension candidates. Maximal degree in co-relation 97580. Up to 14384 conditions per place. [2024-06-20 18:01:36,281 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 219 selfloop transitions, 51 changer transitions 0/279 dead transitions. [2024-06-20 18:01:36,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 279 transitions, 4054 flow [2024-06-20 18:01:36,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:01:36,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:01:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-20 18:01:36,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-20 18:01:36,283 INFO L175 Difference]: Start difference. First operand has 219 places, 264 transitions, 3456 flow. Second operand 6 states and 165 transitions. [2024-06-20 18:01:36,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 279 transitions, 4054 flow [2024-06-20 18:01:38,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 279 transitions, 3947 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 18:01:38,563 INFO L231 Difference]: Finished difference. Result has 221 places, 266 transitions, 3484 flow [2024-06-20 18:01:38,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3484, PETRI_PLACES=221, PETRI_TRANSITIONS=266} [2024-06-20 18:01:38,564 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 169 predicate places. [2024-06-20 18:01:38,564 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 266 transitions, 3484 flow [2024-06-20 18:01:38,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:38,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:38,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:38,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 18:01:38,565 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:38,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash 697556725, now seen corresponding path program 1 times [2024-06-20 18:01:38,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:38,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70694775] [2024-06-20 18:01:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:38,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:38,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:38,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70694775] [2024-06-20 18:01:38,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70694775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:38,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:38,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 18:01:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707347015] [2024-06-20 18:01:38,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:38,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 18:01:38,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 18:01:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 18:01:38,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:01:38,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 266 transitions, 3484 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:38,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:38,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:01:38,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:42,141 INFO L124 PetriNetUnfolderBase]: 10149/15284 cut-off events. [2024-06-20 18:01:42,141 INFO L125 PetriNetUnfolderBase]: For 423881/423881 co-relation queries the response was YES. [2024-06-20 18:01:42,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97515 conditions, 15284 events. 10149/15284 cut-off events. For 423881/423881 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 102924 event pairs, 3596 based on Foata normal form. 6/15285 useless extension candidates. Maximal degree in co-relation 97410. Up to 14312 conditions per place. [2024-06-20 18:01:42,382 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 254 selfloop transitions, 28 changer transitions 0/291 dead transitions. [2024-06-20 18:01:42,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 291 transitions, 4218 flow [2024-06-20 18:01:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:01:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:01:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-20 18:01:42,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-20 18:01:42,383 INFO L175 Difference]: Start difference. First operand has 221 places, 266 transitions, 3484 flow. Second operand 6 states and 166 transitions. [2024-06-20 18:01:42,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 291 transitions, 4218 flow [2024-06-20 18:01:44,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 291 transitions, 4132 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 18:01:44,212 INFO L231 Difference]: Finished difference. Result has 225 places, 271 transitions, 3559 flow [2024-06-20 18:01:44,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3559, PETRI_PLACES=225, PETRI_TRANSITIONS=271} [2024-06-20 18:01:44,212 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 173 predicate places. [2024-06-20 18:01:44,212 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 271 transitions, 3559 flow [2024-06-20 18:01:44,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:44,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:44,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:44,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 18:01:44,213 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:44,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1168727123, now seen corresponding path program 1 times [2024-06-20 18:01:44,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:44,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429401507] [2024-06-20 18:01:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:44,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:44,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:44,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429401507] [2024-06-20 18:01:44,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429401507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:44,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:44,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:01:44,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169791727] [2024-06-20 18:01:44,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:44,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:01:44,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:44,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:01:44,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:01:44,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-06-20 18:01:44,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 271 transitions, 3559 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:44,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:44,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-06-20 18:01:44,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:47,520 INFO L124 PetriNetUnfolderBase]: 10350/15593 cut-off events. [2024-06-20 18:01:47,520 INFO L125 PetriNetUnfolderBase]: For 452304/452309 co-relation queries the response was YES. [2024-06-20 18:01:47,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100913 conditions, 15593 events. 10350/15593 cut-off events. For 452304/452309 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 105352 event pairs, 3646 based on Foata normal form. 6/15591 useless extension candidates. Maximal degree in co-relation 100804. Up to 14377 conditions per place. [2024-06-20 18:01:48,238 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 207 selfloop transitions, 110 changer transitions 0/325 dead transitions. [2024-06-20 18:01:48,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 325 transitions, 4884 flow [2024-06-20 18:01:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:01:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:01:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-20 18:01:48,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-20 18:01:48,240 INFO L175 Difference]: Start difference. First operand has 225 places, 271 transitions, 3559 flow. Second operand 6 states and 179 transitions. [2024-06-20 18:01:48,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 325 transitions, 4884 flow [2024-06-20 18:01:50,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 325 transitions, 4827 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 18:01:50,999 INFO L231 Difference]: Finished difference. Result has 230 places, 303 transitions, 4370 flow [2024-06-20 18:01:51,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4370, PETRI_PLACES=230, PETRI_TRANSITIONS=303} [2024-06-20 18:01:51,000 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 178 predicate places. [2024-06-20 18:01:51,000 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 303 transitions, 4370 flow [2024-06-20 18:01:51,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:51,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:51,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:51,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 18:01:51,001 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:51,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:51,001 INFO L85 PathProgramCache]: Analyzing trace with hash 724453737, now seen corresponding path program 2 times [2024-06-20 18:01:51,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:51,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065480717] [2024-06-20 18:01:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:51,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:51,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:51,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065480717] [2024-06-20 18:01:51,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065480717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:51,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:51,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:01:51,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964317164] [2024-06-20 18:01:51,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:51,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:01:51,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:51,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:01:51,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:01:51,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:01:51,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 303 transitions, 4370 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:51,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:51,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:01:51,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:54,023 INFO L124 PetriNetUnfolderBase]: 10326/15563 cut-off events. [2024-06-20 18:01:54,023 INFO L125 PetriNetUnfolderBase]: For 488835/488840 co-relation queries the response was YES. [2024-06-20 18:01:54,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106085 conditions, 15563 events. 10326/15563 cut-off events. For 488835/488840 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 105063 event pairs, 3646 based on Foata normal form. 6/15561 useless extension candidates. Maximal degree in co-relation 105974. Up to 14353 conditions per place. [2024-06-20 18:01:54,232 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 206 selfloop transitions, 112 changer transitions 0/327 dead transitions. [2024-06-20 18:01:54,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 327 transitions, 5144 flow [2024-06-20 18:01:54,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:01:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:01:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-20 18:01:54,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064139941690962 [2024-06-20 18:01:54,240 INFO L175 Difference]: Start difference. First operand has 230 places, 303 transitions, 4370 flow. Second operand 7 states and 208 transitions. [2024-06-20 18:01:54,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 327 transitions, 5144 flow [2024-06-20 18:01:56,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 327 transitions, 4893 flow, removed 93 selfloop flow, removed 3 redundant places. [2024-06-20 18:01:56,808 INFO L231 Difference]: Finished difference. Result has 234 places, 305 transitions, 4411 flow [2024-06-20 18:01:56,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4411, PETRI_PLACES=234, PETRI_TRANSITIONS=305} [2024-06-20 18:01:56,809 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 182 predicate places. [2024-06-20 18:01:56,809 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 305 transitions, 4411 flow [2024-06-20 18:01:56,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:56,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:01:56,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:01:56,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 18:01:56,810 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:01:56,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:01:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash -701868849, now seen corresponding path program 1 times [2024-06-20 18:01:56,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:01:56,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550226538] [2024-06-20 18:01:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:01:56,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:01:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:01:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:01:57,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:01:57,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550226538] [2024-06-20 18:01:57,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550226538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:01:57,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:01:57,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:01:57,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940945211] [2024-06-20 18:01:57,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:01:57,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:01:57,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:01:57,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:01:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:01:57,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 18:01:57,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 305 transitions, 4411 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:01:57,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:01:57,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 18:01:57,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:01:59,963 INFO L124 PetriNetUnfolderBase]: 10329/15639 cut-off events. [2024-06-20 18:01:59,963 INFO L125 PetriNetUnfolderBase]: For 515163/515170 co-relation queries the response was YES. [2024-06-20 18:02:00,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104860 conditions, 15639 events. 10329/15639 cut-off events. For 515163/515170 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 106446 event pairs, 2901 based on Foata normal form. 52/15476 useless extension candidates. Maximal degree in co-relation 104748. Up to 13471 conditions per place. [2024-06-20 18:02:00,441 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 242 selfloop transitions, 66 changer transitions 0/351 dead transitions. [2024-06-20 18:02:00,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 351 transitions, 5409 flow [2024-06-20 18:02:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 18:02:00,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 18:02:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-20 18:02:00,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-20 18:02:00,442 INFO L175 Difference]: Start difference. First operand has 234 places, 305 transitions, 4411 flow. Second operand 6 states and 190 transitions. [2024-06-20 18:02:00,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 351 transitions, 5409 flow [2024-06-20 18:02:02,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 351 transitions, 5135 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 18:02:02,221 INFO L231 Difference]: Finished difference. Result has 234 places, 316 transitions, 4473 flow [2024-06-20 18:02:02,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4473, PETRI_PLACES=234, PETRI_TRANSITIONS=316} [2024-06-20 18:02:02,222 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 182 predicate places. [2024-06-20 18:02:02,222 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 316 transitions, 4473 flow [2024-06-20 18:02:02,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:02,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:02,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:02,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 18:02:02,223 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:02:02,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1871846375, now seen corresponding path program 3 times [2024-06-20 18:02:02,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:02,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925649675] [2024-06-20 18:02:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:02,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:02,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:02,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925649675] [2024-06-20 18:02:02,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925649675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:02,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:02,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:02:02,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727340829] [2024-06-20 18:02:02,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:02,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:02:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:02:02,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:02:02,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:02:02,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 316 transitions, 4473 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:02,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:02,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:02:02,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:02:05,381 INFO L124 PetriNetUnfolderBase]: 10655/16051 cut-off events. [2024-06-20 18:02:05,381 INFO L125 PetriNetUnfolderBase]: For 466229/466232 co-relation queries the response was YES. [2024-06-20 18:02:05,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108864 conditions, 16051 events. 10655/16051 cut-off events. For 466229/466232 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 108493 event pairs, 3661 based on Foata normal form. 1/16045 useless extension candidates. Maximal degree in co-relation 108752. Up to 14957 conditions per place. [2024-06-20 18:02:05,671 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 277 selfloop transitions, 77 changer transitions 0/363 dead transitions. [2024-06-20 18:02:05,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 363 transitions, 5642 flow [2024-06-20 18:02:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:02:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:02:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-20 18:02:05,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5600907029478458 [2024-06-20 18:02:05,672 INFO L175 Difference]: Start difference. First operand has 234 places, 316 transitions, 4473 flow. Second operand 9 states and 247 transitions. [2024-06-20 18:02:05,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 363 transitions, 5642 flow [2024-06-20 18:02:08,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 5552 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 18:02:08,466 INFO L231 Difference]: Finished difference. Result has 243 places, 334 transitions, 4916 flow [2024-06-20 18:02:08,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4386, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4916, PETRI_PLACES=243, PETRI_TRANSITIONS=334} [2024-06-20 18:02:08,467 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 191 predicate places. [2024-06-20 18:02:08,467 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 334 transitions, 4916 flow [2024-06-20 18:02:08,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:08,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:02:08,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:02:08,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 18:02:08,468 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 18:02:08,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:02:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1871399045, now seen corresponding path program 4 times [2024-06-20 18:02:08,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:02:08,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161284506] [2024-06-20 18:02:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:02:08,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:02:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:02:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:02:08,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:02:08,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161284506] [2024-06-20 18:02:08,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161284506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:02:08,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:02:08,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:02:08,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863289790] [2024-06-20 18:02:08,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:02:08,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:02:08,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:02:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:02:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:02:08,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 18:02:08,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 334 transitions, 4916 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:02:08,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:02:08,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 18:02:08,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand