./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe023_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe023_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:41:08,107 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:41:08,148 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:41:08,151 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:41:08,151 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:41:08,177 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:41:08,178 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:41:08,178 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:41:08,179 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:41:08,182 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:41:08,182 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:41:08,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:41:08,183 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:41:08,184 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:41:08,184 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:41:08,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:41:08,185 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:41:08,185 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:41:08,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:41:08,185 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:41:08,185 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:41:08,186 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:41:08,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:41:08,186 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:41:08,186 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:41:08,186 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:41:08,187 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:41:08,187 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:41:08,187 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:41:08,187 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:41:08,188 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:41:08,188 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:41:08,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:41:08,189 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:41:08,189 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:41:08,189 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:41:08,189 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:41:08,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:41:08,189 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:41:08,190 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:41:08,190 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:41:08,190 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:41:08,190 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:41:08,190 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:41:08,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:41:08,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:41:08,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:41:08,388 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:41:08,388 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:41:08,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe023_tso.yml/witness.yml [2024-05-12 10:41:08,516 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:41:08,517 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:41:08,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-05-12 10:41:09,407 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:41:09,648 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:41:09,648 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-05-12 10:41:09,663 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1a6bea6/a759d1d1cbff485886a78c584dd6c319/FLAG4537c79f5 [2024-05-12 10:41:09,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1a6bea6/a759d1d1cbff485886a78c584dd6c319 [2024-05-12 10:41:09,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:41:09,677 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:41:09,678 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:41:09,678 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:41:09,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:41:09,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:41:08" (1/2) ... [2024-05-12 10:41:09,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789f77f1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:41:09, skipping insertion in model container [2024-05-12 10:41:09,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:41:08" (1/2) ... [2024-05-12 10:41:09,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5866503b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:41:09, skipping insertion in model container [2024-05-12 10:41:09,684 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:41:09" (2/2) ... [2024-05-12 10:41:09,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789f77f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:09, skipping insertion in model container [2024-05-12 10:41:09,685 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:41:09" (2/2) ... [2024-05-12 10:41:09,685 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:41:09,721 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:41:09,722 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_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 && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 10:41:09,722 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_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 && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 10:41:09,722 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_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 && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-05-12 10:41:09,722 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:41:09,723 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-05-12 10:41:09,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:41:09,888 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i[945,958] [2024-05-12 10:41:10,015 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:41:10,022 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:41:10,051 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:41:10,114 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:41:10,144 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:41:10,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10 WrapperNode [2024-05-12 10:41:10,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:41:10,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:41:10,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:41:10,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:41:10,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,202 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-05-12 10:41:10,202 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:41:10,203 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:41:10,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:41:10,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:41:10,211 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,213 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,232 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 10:41:10,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,233 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,239 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,246 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,249 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:41:10,249 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:41:10,250 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:41:10,250 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:41:10,250 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (1/1) ... [2024-05-12 10:41:10,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:41:10,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:41:10,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-05-12 10:41:10,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-05-12 10:41:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:41:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:41:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:41:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:41:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:41:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:41:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:41:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:41:10,329 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:41:10,330 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:41:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:41:10,330 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:41:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 10:41:10,331 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 10:41:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:41:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:41:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:41:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:41:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:41:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:41:10,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:41:10,334 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:41:10,468 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:41:10,470 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:41:10,715 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:41:10,717 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:41:10,809 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:41:10,810 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:41:10,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:41:10 BoogieIcfgContainer [2024-05-12 10:41:10,810 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:41:10,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:41:10,812 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:41:10,814 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:41:10,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:41:08" (1/4) ... [2024-05-12 10:41:10,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d7f527 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:41:10, skipping insertion in model container [2024-05-12 10:41:10,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:41:09" (2/4) ... [2024-05-12 10:41:10,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d7f527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:41:10, skipping insertion in model container [2024-05-12 10:41:10,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:41:10" (3/4) ... [2024-05-12 10:41:10,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d7f527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:41:10, skipping insertion in model container [2024-05-12 10:41:10,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:41:10" (4/4) ... [2024-05-12 10:41:10,831 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2024-05-12 10:41:10,845 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:41:10,845 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 10:41:10,845 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:41:10,894 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:41:10,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-05-12 10:41:10,959 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-05-12 10:41:10,959 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:41:10,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 72 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-05-12 10:41:10,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-05-12 10:41:10,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-05-12 10:41:10,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:41:10,987 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;@2daba82f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:41:10,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 10:41:10,992 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:41:10,992 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:41:10,992 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:41:10,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:10,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:41:10,994 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:10,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:10,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1787111274, now seen corresponding path program 1 times [2024-05-12 10:41:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:11,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773520059] [2024-05-12 10:41:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:11,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:11,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773520059] [2024-05-12 10:41:11,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773520059] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:11,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:11,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:41:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380362053] [2024-05-12 10:41:11,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:11,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:41:11,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:41:11,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:41:11,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-05-12 10:41:11,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:11,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:11,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-05-12 10:41:11,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:11,910 INFO L124 PetriNetUnfolderBase]: 736/1279 cut-off events. [2024-05-12 10:41:11,911 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-05-12 10:41:11,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2466 conditions, 1279 events. 736/1279 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7100 event pairs, 509 based on Foata normal form. 1/1223 useless extension candidates. Maximal degree in co-relation 2451. Up to 1120 conditions per place. [2024-05-12 10:41:11,922 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 33 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2024-05-12 10:41:11,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 195 flow [2024-05-12 10:41:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:41:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:41:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-05-12 10:41:11,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7092198581560284 [2024-05-12 10:41:11,933 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 100 transitions. [2024-05-12 10:41:11,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 195 flow [2024-05-12 10:41:11,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 190 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:11,940 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 118 flow [2024-05-12 10:41:11,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-05-12 10:41:11,944 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-05-12 10:41:11,945 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 118 flow [2024-05-12 10:41:11,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:11,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:11,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:11,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:41:11,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:11,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:11,947 INFO L85 PathProgramCache]: Analyzing trace with hash 573027253, now seen corresponding path program 1 times [2024-05-12 10:41:11,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:11,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043587574] [2024-05-12 10:41:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:11,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:12,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:12,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043587574] [2024-05-12 10:41:12,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043587574] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:12,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:12,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:41:12,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408138995] [2024-05-12 10:41:12,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:12,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:41:12,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:12,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:41:12,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:41:12,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:41:12,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:12,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:12,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:41:12,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:12,428 INFO L124 PetriNetUnfolderBase]: 1257/2087 cut-off events. [2024-05-12 10:41:12,428 INFO L125 PetriNetUnfolderBase]: For 361/361 co-relation queries the response was YES. [2024-05-12 10:41:12,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4549 conditions, 2087 events. 1257/2087 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11886 event pairs, 552 based on Foata normal form. 5/2085 useless extension candidates. Maximal degree in co-relation 4534. Up to 1806 conditions per place. [2024-05-12 10:41:12,440 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 50 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-05-12 10:41:12,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 320 flow [2024-05-12 10:41:12,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:41:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:41:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-05-12 10:41:12,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6968085106382979 [2024-05-12 10:41:12,442 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 118 flow. Second operand 4 states and 131 transitions. [2024-05-12 10:41:12,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 320 flow [2024-05-12 10:41:12,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:41:12,444 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 189 flow [2024-05-12 10:41:12,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-05-12 10:41:12,444 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-05-12 10:41:12,445 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 189 flow [2024-05-12 10:41:12,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:12,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:12,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:12,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:41:12,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:12,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:12,445 INFO L85 PathProgramCache]: Analyzing trace with hash 923421396, now seen corresponding path program 1 times [2024-05-12 10:41:12,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:12,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644614599] [2024-05-12 10:41:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:12,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:12,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:12,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644614599] [2024-05-12 10:41:12,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644614599] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:12,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:12,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:41:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619960912] [2024-05-12 10:41:12,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:12,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:41:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:41:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:41:12,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:41:12,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:12,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:12,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:41:12,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:12,889 INFO L124 PetriNetUnfolderBase]: 1271/2211 cut-off events. [2024-05-12 10:41:12,890 INFO L125 PetriNetUnfolderBase]: For 1243/1272 co-relation queries the response was YES. [2024-05-12 10:41:12,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5510 conditions, 2211 events. 1271/2211 cut-off events. For 1243/1272 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12929 event pairs, 432 based on Foata normal form. 15/2218 useless extension candidates. Maximal degree in co-relation 5492. Up to 1768 conditions per place. [2024-05-12 10:41:12,903 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 60 selfloop transitions, 16 changer transitions 0/90 dead transitions. [2024-05-12 10:41:12,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 90 transitions, 449 flow [2024-05-12 10:41:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:12,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:12,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-05-12 10:41:12,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6936170212765957 [2024-05-12 10:41:12,905 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 189 flow. Second operand 5 states and 163 transitions. [2024-05-12 10:41:12,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 90 transitions, 449 flow [2024-05-12 10:41:12,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 90 transitions, 447 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 10:41:12,908 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 264 flow [2024-05-12 10:41:12,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-05-12 10:41:12,909 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2024-05-12 10:41:12,909 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 264 flow [2024-05-12 10:41:12,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:12,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:12,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:12,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:41:12,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:12,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:12,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1814682023, now seen corresponding path program 1 times [2024-05-12 10:41:12,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:12,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290828845] [2024-05-12 10:41:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:12,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:13,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:13,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290828845] [2024-05-12 10:41:13,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290828845] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:13,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:13,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:41:13,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784133607] [2024-05-12 10:41:13,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:13,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:41:13,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:41:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:41:13,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:41:13,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:13,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:13,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:41:13,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:13,410 INFO L124 PetriNetUnfolderBase]: 1255/2061 cut-off events. [2024-05-12 10:41:13,410 INFO L125 PetriNetUnfolderBase]: For 2219/2234 co-relation queries the response was YES. [2024-05-12 10:41:13,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5966 conditions, 2061 events. 1255/2061 cut-off events. For 2219/2234 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11696 event pairs, 438 based on Foata normal form. 15/2069 useless extension candidates. Maximal degree in co-relation 5945. Up to 1808 conditions per place. [2024-05-12 10:41:13,422 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 52 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-05-12 10:41:13,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 437 flow [2024-05-12 10:41:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:41:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:41:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-05-12 10:41:13,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648936170212766 [2024-05-12 10:41:13,424 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 264 flow. Second operand 4 states and 125 transitions. [2024-05-12 10:41:13,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 437 flow [2024-05-12 10:41:13,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 423 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-05-12 10:41:13,427 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 303 flow [2024-05-12 10:41:13,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=303, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-05-12 10:41:13,428 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2024-05-12 10:41:13,428 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 303 flow [2024-05-12 10:41:13,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:13,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:13,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:13,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:41:13,429 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:13,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:13,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1732353045, now seen corresponding path program 1 times [2024-05-12 10:41:13,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:13,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408681228] [2024-05-12 10:41:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:13,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:13,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408681228] [2024-05-12 10:41:13,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408681228] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:13,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:13,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:13,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487765325] [2024-05-12 10:41:13,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:13,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:13,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:13,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:13,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:13,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:41:13,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:13,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:13,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:41:13,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:13,908 INFO L124 PetriNetUnfolderBase]: 1273/2118 cut-off events. [2024-05-12 10:41:13,909 INFO L125 PetriNetUnfolderBase]: For 2932/2988 co-relation queries the response was YES. [2024-05-12 10:41:13,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6307 conditions, 2118 events. 1273/2118 cut-off events. For 2932/2988 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12118 event pairs, 288 based on Foata normal form. 30/2140 useless extension candidates. Maximal degree in co-relation 6282. Up to 1716 conditions per place. [2024-05-12 10:41:13,922 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 66 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-05-12 10:41:13,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 589 flow [2024-05-12 10:41:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-05-12 10:41:13,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6737588652482269 [2024-05-12 10:41:13,924 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 303 flow. Second operand 6 states and 190 transitions. [2024-05-12 10:41:13,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 589 flow [2024-05-12 10:41:13,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 579 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 10:41:13,928 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 359 flow [2024-05-12 10:41:13,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-05-12 10:41:13,929 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-05-12 10:41:13,929 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 359 flow [2024-05-12 10:41:13,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:13,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:13,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:13,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:41:13,930 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:13,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash 420569432, now seen corresponding path program 1 times [2024-05-12 10:41:13,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:13,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226210352] [2024-05-12 10:41:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:13,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:14,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:14,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226210352] [2024-05-12 10:41:14,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226210352] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:14,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:14,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:41:14,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74702551] [2024-05-12 10:41:14,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:14,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:41:14,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:14,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:41:14,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:41:14,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:14,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 359 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:14,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:14,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:14,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:14,434 INFO L124 PetriNetUnfolderBase]: 1605/2572 cut-off events. [2024-05-12 10:41:14,434 INFO L125 PetriNetUnfolderBase]: For 4874/4874 co-relation queries the response was YES. [2024-05-12 10:41:14,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8256 conditions, 2572 events. 1605/2572 cut-off events. For 4874/4874 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14690 event pairs, 490 based on Foata normal form. 4/2568 useless extension candidates. Maximal degree in co-relation 8229. Up to 2257 conditions per place. [2024-05-12 10:41:14,453 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 75 selfloop transitions, 15 changer transitions 0/103 dead transitions. [2024-05-12 10:41:14,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 721 flow [2024-05-12 10:41:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-05-12 10:41:14,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6425531914893617 [2024-05-12 10:41:14,454 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 359 flow. Second operand 5 states and 151 transitions. [2024-05-12 10:41:14,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 721 flow [2024-05-12 10:41:14,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 659 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:14,460 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 462 flow [2024-05-12 10:41:14,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=462, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-05-12 10:41:14,462 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2024-05-12 10:41:14,463 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 462 flow [2024-05-12 10:41:14,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:14,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:14,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:14,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:41:14,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:14,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:14,464 INFO L85 PathProgramCache]: Analyzing trace with hash 475165285, now seen corresponding path program 1 times [2024-05-12 10:41:14,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:14,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824668303] [2024-05-12 10:41:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:14,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:14,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:14,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824668303] [2024-05-12 10:41:14,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824668303] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:14,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:14,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:41:14,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849170671] [2024-05-12 10:41:14,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:14,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:41:14,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:14,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:41:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:41:14,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:14,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 462 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:14,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:14,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:14,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:14,998 INFO L124 PetriNetUnfolderBase]: 1622/2690 cut-off events. [2024-05-12 10:41:14,998 INFO L125 PetriNetUnfolderBase]: For 6047/6051 co-relation queries the response was YES. [2024-05-12 10:41:15,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8943 conditions, 2690 events. 1622/2690 cut-off events. For 6047/6051 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15947 event pairs, 726 based on Foata normal form. 6/2669 useless extension candidates. Maximal degree in co-relation 8913. Up to 2275 conditions per place. [2024-05-12 10:41:15,015 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 77 selfloop transitions, 17 changer transitions 0/107 dead transitions. [2024-05-12 10:41:15,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 767 flow [2024-05-12 10:41:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-05-12 10:41:15,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340425531914894 [2024-05-12 10:41:15,016 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 462 flow. Second operand 5 states and 149 transitions. [2024-05-12 10:41:15,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 767 flow [2024-05-12 10:41:15,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 107 transitions, 761 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-05-12 10:41:15,022 INFO L231 Difference]: Finished difference. Result has 77 places, 83 transitions, 537 flow [2024-05-12 10:41:15,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=77, PETRI_TRANSITIONS=83} [2024-05-12 10:41:15,023 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 26 predicate places. [2024-05-12 10:41:15,023 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 83 transitions, 537 flow [2024-05-12 10:41:15,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:15,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:15,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:15,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:41:15,023 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:15,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1463453067, now seen corresponding path program 2 times [2024-05-12 10:41:15,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:15,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453636576] [2024-05-12 10:41:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:15,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:15,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453636576] [2024-05-12 10:41:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453636576] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:15,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:15,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:41:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326768377] [2024-05-12 10:41:15,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:15,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:41:15,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:41:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:41:15,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:15,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 83 transitions, 537 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:15,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:15,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:15,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:15,538 INFO L124 PetriNetUnfolderBase]: 1617/2633 cut-off events. [2024-05-12 10:41:15,538 INFO L125 PetriNetUnfolderBase]: For 6988/6992 co-relation queries the response was YES. [2024-05-12 10:41:15,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9186 conditions, 2633 events. 1617/2633 cut-off events. For 6988/6992 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15207 event pairs, 526 based on Foata normal form. 2/2622 useless extension candidates. Maximal degree in co-relation 9152. Up to 2270 conditions per place. [2024-05-12 10:41:15,555 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 76 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-05-12 10:41:15,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 109 transitions, 804 flow [2024-05-12 10:41:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-05-12 10:41:15,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468085106382979 [2024-05-12 10:41:15,557 INFO L175 Difference]: Start difference. First operand has 77 places, 83 transitions, 537 flow. Second operand 5 states and 152 transitions. [2024-05-12 10:41:15,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 109 transitions, 804 flow [2024-05-12 10:41:15,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 785 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-05-12 10:41:15,564 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 596 flow [2024-05-12 10:41:15,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=596, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2024-05-12 10:41:15,565 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 31 predicate places. [2024-05-12 10:41:15,565 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 596 flow [2024-05-12 10:41:15,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:15,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:15,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:15,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:41:15,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:15,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash 440349495, now seen corresponding path program 1 times [2024-05-12 10:41:15,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:15,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753031100] [2024-05-12 10:41:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:15,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:15,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:15,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753031100] [2024-05-12 10:41:15,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753031100] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:15,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:15,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444672796] [2024-05-12 10:41:15,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:15,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:15,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:15,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:15,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:15,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 596 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:15,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:15,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:15,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:16,141 INFO L124 PetriNetUnfolderBase]: 1636/2677 cut-off events. [2024-05-12 10:41:16,142 INFO L125 PetriNetUnfolderBase]: For 8368/8368 co-relation queries the response was YES. [2024-05-12 10:41:16,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9498 conditions, 2677 events. 1636/2677 cut-off events. For 8368/8368 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15550 event pairs, 469 based on Foata normal form. 8/2677 useless extension candidates. Maximal degree in co-relation 9461. Up to 2247 conditions per place. [2024-05-12 10:41:16,160 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 80 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-05-12 10:41:16,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 886 flow [2024-05-12 10:41:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 10:41:16,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-05-12 10:41:16,162 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 596 flow. Second operand 6 states and 176 transitions. [2024-05-12 10:41:16,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 886 flow [2024-05-12 10:41:16,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 116 transitions, 862 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:41:16,177 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 650 flow [2024-05-12 10:41:16,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=650, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-05-12 10:41:16,177 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 35 predicate places. [2024-05-12 10:41:16,177 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 650 flow [2024-05-12 10:41:16,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:16,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:16,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:16,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:41:16,178 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:16,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1479434317, now seen corresponding path program 1 times [2024-05-12 10:41:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:16,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872425407] [2024-05-12 10:41:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:16,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:16,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:16,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872425407] [2024-05-12 10:41:16,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872425407] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:16,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:16,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:16,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690394767] [2024-05-12 10:41:16,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:16,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:16,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:16,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:16,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:41:16,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 650 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:16,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:16,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:41:16,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:16,820 INFO L124 PetriNetUnfolderBase]: 1537/2633 cut-off events. [2024-05-12 10:41:16,821 INFO L125 PetriNetUnfolderBase]: For 11206/11254 co-relation queries the response was YES. [2024-05-12 10:41:16,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9818 conditions, 2633 events. 1537/2633 cut-off events. For 11206/11254 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15697 event pairs, 454 based on Foata normal form. 48/2605 useless extension candidates. Maximal degree in co-relation 9779. Up to 2076 conditions per place. [2024-05-12 10:41:16,835 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 78 selfloop transitions, 25 changer transitions 0/124 dead transitions. [2024-05-12 10:41:16,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 952 flow [2024-05-12 10:41:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-05-12 10:41:16,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2024-05-12 10:41:16,837 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 650 flow. Second operand 6 states and 185 transitions. [2024-05-12 10:41:16,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 952 flow [2024-05-12 10:41:16,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 124 transitions, 898 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:16,847 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 676 flow [2024-05-12 10:41:16,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=676, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2024-05-12 10:41:16,847 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 37 predicate places. [2024-05-12 10:41:16,848 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 676 flow [2024-05-12 10:41:16,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:16,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:16,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:41:16,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:16,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1391959377, now seen corresponding path program 2 times [2024-05-12 10:41:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:16,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336365910] [2024-05-12 10:41:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:16,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:17,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:17,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336365910] [2024-05-12 10:41:17,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336365910] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:17,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:17,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:17,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77404479] [2024-05-12 10:41:17,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:17,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:17,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:17,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:17,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:41:17,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 676 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:17,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:17,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:41:17,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:17,417 INFO L124 PetriNetUnfolderBase]: 1535/2570 cut-off events. [2024-05-12 10:41:17,417 INFO L125 PetriNetUnfolderBase]: For 12352/12423 co-relation queries the response was YES. [2024-05-12 10:41:17,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9873 conditions, 2570 events. 1535/2570 cut-off events. For 12352/12423 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15255 event pairs, 426 based on Foata normal form. 72/2565 useless extension candidates. Maximal degree in co-relation 9833. Up to 2052 conditions per place. [2024-05-12 10:41:17,435 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 78 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2024-05-12 10:41:17,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 127 transitions, 974 flow [2024-05-12 10:41:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 10:41:17,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352583586626139 [2024-05-12 10:41:17,437 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 676 flow. Second operand 7 states and 209 transitions. [2024-05-12 10:41:17,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 127 transitions, 974 flow [2024-05-12 10:41:17,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 127 transitions, 924 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:17,448 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 691 flow [2024-05-12 10:41:17,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=691, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-05-12 10:41:17,449 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 40 predicate places. [2024-05-12 10:41:17,449 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 691 flow [2024-05-12 10:41:17,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:17,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:17,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:17,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:41:17,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:17,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash -241355972, now seen corresponding path program 1 times [2024-05-12 10:41:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:17,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181586070] [2024-05-12 10:41:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:17,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:17,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181586070] [2024-05-12 10:41:17,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181586070] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:17,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:17,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:17,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11001076] [2024-05-12 10:41:17,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:17,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:17,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:17,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:17,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:17,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 691 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:17,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:17,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:17,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:18,151 INFO L124 PetriNetUnfolderBase]: 1695/2837 cut-off events. [2024-05-12 10:41:18,152 INFO L125 PetriNetUnfolderBase]: For 13126/13130 co-relation queries the response was YES. [2024-05-12 10:41:18,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10618 conditions, 2837 events. 1695/2837 cut-off events. For 13126/13130 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16998 event pairs, 668 based on Foata normal form. 2/2807 useless extension candidates. Maximal degree in co-relation 10577. Up to 2295 conditions per place. [2024-05-12 10:41:18,170 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 101 selfloop transitions, 30 changer transitions 0/144 dead transitions. [2024-05-12 10:41:18,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 144 transitions, 1170 flow [2024-05-12 10:41:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-05-12 10:41:18,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413373860182371 [2024-05-12 10:41:18,172 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 691 flow. Second operand 7 states and 211 transitions. [2024-05-12 10:41:18,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 144 transitions, 1170 flow [2024-05-12 10:41:18,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 144 transitions, 1078 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:18,187 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 763 flow [2024-05-12 10:41:18,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=763, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-05-12 10:41:18,188 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 43 predicate places. [2024-05-12 10:41:18,188 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 763 flow [2024-05-12 10:41:18,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:18,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:18,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:18,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:41:18,189 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:18,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:18,189 INFO L85 PathProgramCache]: Analyzing trace with hash 201276684, now seen corresponding path program 2 times [2024-05-12 10:41:18,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:18,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126676872] [2024-05-12 10:41:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:18,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:18,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:18,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126676872] [2024-05-12 10:41:18,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126676872] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:18,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:18,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:18,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017811258] [2024-05-12 10:41:18,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:18,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:18,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:18,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:18,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:18,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:18,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 763 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:18,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:18,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:18,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:18,850 INFO L124 PetriNetUnfolderBase]: 1712/2799 cut-off events. [2024-05-12 10:41:18,851 INFO L125 PetriNetUnfolderBase]: For 14528/14528 co-relation queries the response was YES. [2024-05-12 10:41:18,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11157 conditions, 2799 events. 1712/2799 cut-off events. For 14528/14528 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16359 event pairs, 587 based on Foata normal form. 2/2783 useless extension candidates. Maximal degree in co-relation 11114. Up to 2278 conditions per place. [2024-05-12 10:41:18,870 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 111 selfloop transitions, 40 changer transitions 0/164 dead transitions. [2024-05-12 10:41:18,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 164 transitions, 1346 flow [2024-05-12 10:41:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-05-12 10:41:18,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193853427895981 [2024-05-12 10:41:18,872 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 763 flow. Second operand 9 states and 262 transitions. [2024-05-12 10:41:18,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 164 transitions, 1346 flow [2024-05-12 10:41:18,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 164 transitions, 1307 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 10:41:18,888 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 888 flow [2024-05-12 10:41:18,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=888, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2024-05-12 10:41:18,889 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2024-05-12 10:41:18,889 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 888 flow [2024-05-12 10:41:18,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:18,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:18,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:18,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:41:18,890 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:18,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:18,890 INFO L85 PathProgramCache]: Analyzing trace with hash 760965636, now seen corresponding path program 3 times [2024-05-12 10:41:18,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:18,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463450762] [2024-05-12 10:41:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:18,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:19,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:19,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463450762] [2024-05-12 10:41:19,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463450762] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:19,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:19,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:19,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502943450] [2024-05-12 10:41:19,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:19,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:19,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:19,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:19,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 888 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:19,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:19,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:19,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:19,442 INFO L124 PetriNetUnfolderBase]: 1707/2792 cut-off events. [2024-05-12 10:41:19,442 INFO L125 PetriNetUnfolderBase]: For 16752/16752 co-relation queries the response was YES. [2024-05-12 10:41:19,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11805 conditions, 2792 events. 1707/2792 cut-off events. For 16752/16752 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16369 event pairs, 591 based on Foata normal form. 2/2774 useless extension candidates. Maximal degree in co-relation 11759. Up to 2273 conditions per place. [2024-05-12 10:41:19,461 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 105 selfloop transitions, 38 changer transitions 0/156 dead transitions. [2024-05-12 10:41:19,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 156 transitions, 1335 flow [2024-05-12 10:41:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:41:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:41:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-05-12 10:41:19,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-05-12 10:41:19,462 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 888 flow. Second operand 8 states and 236 transitions. [2024-05-12 10:41:19,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 156 transitions, 1335 flow [2024-05-12 10:41:19,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 156 transitions, 1270 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:19,485 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 907 flow [2024-05-12 10:41:19,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=907, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2024-05-12 10:41:19,486 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 55 predicate places. [2024-05-12 10:41:19,486 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 907 flow [2024-05-12 10:41:19,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:19,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:19,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:19,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:41:19,486 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:19,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1512165330, now seen corresponding path program 4 times [2024-05-12 10:41:19,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:19,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853117403] [2024-05-12 10:41:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:19,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:19,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:19,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853117403] [2024-05-12 10:41:19,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853117403] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:19,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:19,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:19,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159680938] [2024-05-12 10:41:19,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:19,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:19,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:19,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:19,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:19,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 907 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:19,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:19,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:19,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:20,116 INFO L124 PetriNetUnfolderBase]: 1724/2893 cut-off events. [2024-05-12 10:41:20,117 INFO L125 PetriNetUnfolderBase]: For 17960/17964 co-relation queries the response was YES. [2024-05-12 10:41:20,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11982 conditions, 2893 events. 1724/2893 cut-off events. For 17960/17964 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17413 event pairs, 656 based on Foata normal form. 2/2865 useless extension candidates. Maximal degree in co-relation 11934. Up to 2291 conditions per place. [2024-05-12 10:41:20,138 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 102 selfloop transitions, 41 changer transitions 0/156 dead transitions. [2024-05-12 10:41:20,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 156 transitions, 1380 flow [2024-05-12 10:41:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-05-12 10:41:20,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6443768996960486 [2024-05-12 10:41:20,140 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 907 flow. Second operand 7 states and 212 transitions. [2024-05-12 10:41:20,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 156 transitions, 1380 flow [2024-05-12 10:41:20,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 156 transitions, 1270 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:20,160 INFO L231 Difference]: Finished difference. Result has 107 places, 115 transitions, 931 flow [2024-05-12 10:41:20,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=931, PETRI_PLACES=107, PETRI_TRANSITIONS=115} [2024-05-12 10:41:20,162 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 56 predicate places. [2024-05-12 10:41:20,162 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 115 transitions, 931 flow [2024-05-12 10:41:20,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:20,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:20,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:20,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:41:20,163 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:20,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2035387498, now seen corresponding path program 5 times [2024-05-12 10:41:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:20,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950240275] [2024-05-12 10:41:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:20,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:20,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:20,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950240275] [2024-05-12 10:41:20,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950240275] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:20,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:20,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:20,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335999318] [2024-05-12 10:41:20,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:20,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:20,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:20,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:20,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:20,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 931 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:20,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:20,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:20,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:20,794 INFO L124 PetriNetUnfolderBase]: 1741/2923 cut-off events. [2024-05-12 10:41:20,794 INFO L125 PetriNetUnfolderBase]: For 20067/20071 co-relation queries the response was YES. [2024-05-12 10:41:20,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12138 conditions, 2923 events. 1741/2923 cut-off events. For 20067/20071 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17632 event pairs, 660 based on Foata normal form. 6/2902 useless extension candidates. Maximal degree in co-relation 12089. Up to 2309 conditions per place. [2024-05-12 10:41:20,815 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 105 selfloop transitions, 45 changer transitions 0/163 dead transitions. [2024-05-12 10:41:20,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 163 transitions, 1433 flow [2024-05-12 10:41:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:41:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:41:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-05-12 10:41:20,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143617021276596 [2024-05-12 10:41:20,817 INFO L175 Difference]: Start difference. First operand has 107 places, 115 transitions, 931 flow. Second operand 8 states and 231 transitions. [2024-05-12 10:41:20,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 163 transitions, 1433 flow [2024-05-12 10:41:20,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 163 transitions, 1341 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:20,844 INFO L231 Difference]: Finished difference. Result has 110 places, 119 transitions, 975 flow [2024-05-12 10:41:20,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=975, PETRI_PLACES=110, PETRI_TRANSITIONS=119} [2024-05-12 10:41:20,845 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 59 predicate places. [2024-05-12 10:41:20,845 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 119 transitions, 975 flow [2024-05-12 10:41:20,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:20,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:20,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:20,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:41:20,846 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:20,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:20,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2003079288, now seen corresponding path program 6 times [2024-05-12 10:41:20,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:20,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313775838] [2024-05-12 10:41:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:20,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:21,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:21,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313775838] [2024-05-12 10:41:21,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313775838] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:21,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:21,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:21,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131239094] [2024-05-12 10:41:21,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:21,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:21,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:21,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:21,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:21,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 119 transitions, 975 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:21,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:21,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:21,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:21,472 INFO L124 PetriNetUnfolderBase]: 1736/2912 cut-off events. [2024-05-12 10:41:21,473 INFO L125 PetriNetUnfolderBase]: For 21315/21319 co-relation queries the response was YES. [2024-05-12 10:41:21,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12201 conditions, 2912 events. 1736/2912 cut-off events. For 21315/21319 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17541 event pairs, 657 based on Foata normal form. 2/2885 useless extension candidates. Maximal degree in co-relation 12151. Up to 2304 conditions per place. [2024-05-12 10:41:21,494 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 111 selfloop transitions, 46 changer transitions 0/170 dead transitions. [2024-05-12 10:41:21,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 170 transitions, 1411 flow [2024-05-12 10:41:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-05-12 10:41:21,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193853427895981 [2024-05-12 10:41:21,496 INFO L175 Difference]: Start difference. First operand has 110 places, 119 transitions, 975 flow. Second operand 9 states and 262 transitions. [2024-05-12 10:41:21,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 170 transitions, 1411 flow [2024-05-12 10:41:21,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 170 transitions, 1346 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:21,528 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 1010 flow [2024-05-12 10:41:21,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1010, PETRI_PLACES=115, PETRI_TRANSITIONS=119} [2024-05-12 10:41:21,528 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-05-12 10:41:21,528 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 1010 flow [2024-05-12 10:41:21,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:21,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:21,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:21,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:41:21,529 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:21,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:21,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2003087224, now seen corresponding path program 1 times [2024-05-12 10:41:21,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:21,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953202608] [2024-05-12 10:41:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:21,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:21,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:21,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953202608] [2024-05-12 10:41:21,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953202608] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:21,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:21,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:21,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597685919] [2024-05-12 10:41:21,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:21,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:21,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:21,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:21,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:21,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:21,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 119 transitions, 1010 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:21,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:21,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:21,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:22,104 INFO L124 PetriNetUnfolderBase]: 1763/2875 cut-off events. [2024-05-12 10:41:22,104 INFO L125 PetriNetUnfolderBase]: For 23787/23791 co-relation queries the response was YES. [2024-05-12 10:41:22,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12448 conditions, 2875 events. 1763/2875 cut-off events. For 23787/23791 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16793 event pairs, 476 based on Foata normal form. 4/2863 useless extension candidates. Maximal degree in co-relation 12397. Up to 2455 conditions per place. [2024-05-12 10:41:22,126 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 117 selfloop transitions, 22 changer transitions 0/152 dead transitions. [2024-05-12 10:41:22,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1378 flow [2024-05-12 10:41:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 10:41:22,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-05-12 10:41:22,127 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 1010 flow. Second operand 6 states and 178 transitions. [2024-05-12 10:41:22,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1378 flow [2024-05-12 10:41:22,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 152 transitions, 1266 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:22,158 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 969 flow [2024-05-12 10:41:22,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=969, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2024-05-12 10:41:22,158 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 62 predicate places. [2024-05-12 10:41:22,159 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 969 flow [2024-05-12 10:41:22,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:22,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:22,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:22,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:41:22,159 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:22,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:22,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1931292602, now seen corresponding path program 2 times [2024-05-12 10:41:22,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:22,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503493329] [2024-05-12 10:41:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:22,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:22,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:22,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503493329] [2024-05-12 10:41:22,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503493329] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:22,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:22,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:22,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816737385] [2024-05-12 10:41:22,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:22,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:22,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:22,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:22,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 969 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:22,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:22,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:22,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:22,746 INFO L124 PetriNetUnfolderBase]: 1790/3000 cut-off events. [2024-05-12 10:41:22,747 INFO L125 PetriNetUnfolderBase]: For 26560/26564 co-relation queries the response was YES. [2024-05-12 10:41:22,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12846 conditions, 3000 events. 1790/3000 cut-off events. For 26560/26564 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18119 event pairs, 695 based on Foata normal form. 8/2977 useless extension candidates. Maximal degree in co-relation 12794. Up to 2496 conditions per place. [2024-05-12 10:41:22,766 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 118 selfloop transitions, 20 changer transitions 0/151 dead transitions. [2024-05-12 10:41:22,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 151 transitions, 1331 flow [2024-05-12 10:41:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-05-12 10:41:22,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134751773049646 [2024-05-12 10:41:22,767 INFO L175 Difference]: Start difference. First operand has 113 places, 121 transitions, 969 flow. Second operand 6 states and 173 transitions. [2024-05-12 10:41:22,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 151 transitions, 1331 flow [2024-05-12 10:41:22,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 151 transitions, 1278 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:22,795 INFO L231 Difference]: Finished difference. Result has 115 places, 123 transitions, 987 flow [2024-05-12 10:41:22,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=987, PETRI_PLACES=115, PETRI_TRANSITIONS=123} [2024-05-12 10:41:22,796 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-05-12 10:41:22,796 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 123 transitions, 987 flow [2024-05-12 10:41:22,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:22,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:22,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:22,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:41:22,797 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:22,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2025856362, now seen corresponding path program 3 times [2024-05-12 10:41:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:22,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856607893] [2024-05-12 10:41:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:22,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:22,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856607893] [2024-05-12 10:41:22,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856607893] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:22,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:22,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:22,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161909182] [2024-05-12 10:41:22,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:22,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:22,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:23,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:23,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:23,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 987 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:23,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:23,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:23,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:23,314 INFO L124 PetriNetUnfolderBase]: 1782/2964 cut-off events. [2024-05-12 10:41:23,314 INFO L125 PetriNetUnfolderBase]: For 28642/28646 co-relation queries the response was YES. [2024-05-12 10:41:23,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12945 conditions, 2964 events. 1782/2964 cut-off events. For 28642/28646 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17831 event pairs, 628 based on Foata normal form. 8/2941 useless extension candidates. Maximal degree in co-relation 12892. Up to 2373 conditions per place. [2024-05-12 10:41:23,353 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 115 selfloop transitions, 26 changer transitions 0/154 dead transitions. [2024-05-12 10:41:23,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 154 transitions, 1361 flow [2024-05-12 10:41:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 10:41:23,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-05-12 10:41:23,354 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 987 flow. Second operand 6 states and 174 transitions. [2024-05-12 10:41:23,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 154 transitions, 1361 flow [2024-05-12 10:41:23,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 154 transitions, 1308 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:23,390 INFO L231 Difference]: Finished difference. Result has 117 places, 125 transitions, 1021 flow [2024-05-12 10:41:23,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1021, PETRI_PLACES=117, PETRI_TRANSITIONS=125} [2024-05-12 10:41:23,391 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-05-12 10:41:23,391 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 125 transitions, 1021 flow [2024-05-12 10:41:23,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:23,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:23,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:23,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:41:23,392 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:23,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1218005862, now seen corresponding path program 1 times [2024-05-12 10:41:23,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:23,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940497856] [2024-05-12 10:41:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:23,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:23,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:23,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940497856] [2024-05-12 10:41:23,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940497856] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:23,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:23,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:23,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021374535] [2024-05-12 10:41:23,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:23,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:23,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:23,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:41:23,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 125 transitions, 1021 flow. Second operand has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:23,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:23,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:41:23,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:24,061 INFO L124 PetriNetUnfolderBase]: 1751/2985 cut-off events. [2024-05-12 10:41:24,061 INFO L125 PetriNetUnfolderBase]: For 34187/34235 co-relation queries the response was YES. [2024-05-12 10:41:24,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13459 conditions, 2985 events. 1751/2985 cut-off events. For 34187/34235 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18029 event pairs, 286 based on Foata normal form. 14/2907 useless extension candidates. Maximal degree in co-relation 13405. Up to 2198 conditions per place. [2024-05-12 10:41:24,082 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 108 selfloop transitions, 37 changer transitions 0/178 dead transitions. [2024-05-12 10:41:24,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 178 transitions, 1539 flow [2024-05-12 10:41:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:41:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:41:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-05-12 10:41:24,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436170212765957 [2024-05-12 10:41:24,084 INFO L175 Difference]: Start difference. First operand has 117 places, 125 transitions, 1021 flow. Second operand 8 states and 242 transitions. [2024-05-12 10:41:24,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 178 transitions, 1539 flow [2024-05-12 10:41:24,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 178 transitions, 1470 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:24,122 INFO L231 Difference]: Finished difference. Result has 121 places, 129 transitions, 1069 flow [2024-05-12 10:41:24,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1069, PETRI_PLACES=121, PETRI_TRANSITIONS=129} [2024-05-12 10:41:24,123 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2024-05-12 10:41:24,123 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 129 transitions, 1069 flow [2024-05-12 10:41:24,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:24,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:24,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:24,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:41:24,124 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:24,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash 156455160, now seen corresponding path program 2 times [2024-05-12 10:41:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:24,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812431478] [2024-05-12 10:41:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:24,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:24,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812431478] [2024-05-12 10:41:24,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812431478] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:24,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:24,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:24,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558264451] [2024-05-12 10:41:24,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:24,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:24,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:41:24,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 129 transitions, 1069 flow. Second operand has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:24,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:24,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:41:24,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:24,781 INFO L124 PetriNetUnfolderBase]: 1748/2979 cut-off events. [2024-05-12 10:41:24,782 INFO L125 PetriNetUnfolderBase]: For 36441/36490 co-relation queries the response was YES. [2024-05-12 10:41:24,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13685 conditions, 2979 events. 1748/2979 cut-off events. For 36441/36490 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17997 event pairs, 404 based on Foata normal form. 9/2897 useless extension candidates. Maximal degree in co-relation 13630. Up to 2292 conditions per place. [2024-05-12 10:41:24,804 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 105 selfloop transitions, 37 changer transitions 0/175 dead transitions. [2024-05-12 10:41:24,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 175 transitions, 1463 flow [2024-05-12 10:41:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:41:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:41:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-05-12 10:41:24,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6356382978723404 [2024-05-12 10:41:24,806 INFO L175 Difference]: Start difference. First operand has 121 places, 129 transitions, 1069 flow. Second operand 8 states and 239 transitions. [2024-05-12 10:41:24,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 175 transitions, 1463 flow [2024-05-12 10:41:24,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 175 transitions, 1403 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:24,848 INFO L231 Difference]: Finished difference. Result has 125 places, 129 transitions, 1091 flow [2024-05-12 10:41:24,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1091, PETRI_PLACES=125, PETRI_TRANSITIONS=129} [2024-05-12 10:41:24,849 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 74 predicate places. [2024-05-12 10:41:24,849 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 129 transitions, 1091 flow [2024-05-12 10:41:24,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:24,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:24,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:24,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:41:24,850 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:24,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:24,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1497915310, now seen corresponding path program 3 times [2024-05-12 10:41:24,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:24,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982860777] [2024-05-12 10:41:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:24,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:25,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:25,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982860777] [2024-05-12 10:41:25,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982860777] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:25,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:25,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:25,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804493333] [2024-05-12 10:41:25,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:25,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:25,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:25,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:25,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:25,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:41:25,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 129 transitions, 1091 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:25,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:25,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:41:25,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:25,476 INFO L124 PetriNetUnfolderBase]: 1731/2892 cut-off events. [2024-05-12 10:41:25,476 INFO L125 PetriNetUnfolderBase]: For 37875/37918 co-relation queries the response was YES. [2024-05-12 10:41:25,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13657 conditions, 2892 events. 1731/2892 cut-off events. For 37875/37918 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17470 event pairs, 368 based on Foata normal form. 6/2804 useless extension candidates. Maximal degree in co-relation 13600. Up to 2265 conditions per place. [2024-05-12 10:41:25,499 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 104 selfloop transitions, 37 changer transitions 0/174 dead transitions. [2024-05-12 10:41:25,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 174 transitions, 1495 flow [2024-05-12 10:41:25,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:41:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:41:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-05-12 10:41:25,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-05-12 10:41:25,501 INFO L175 Difference]: Start difference. First operand has 125 places, 129 transitions, 1091 flow. Second operand 8 states and 236 transitions. [2024-05-12 10:41:25,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 174 transitions, 1495 flow [2024-05-12 10:41:25,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 174 transitions, 1412 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:25,545 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 1114 flow [2024-05-12 10:41:25,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1114, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-05-12 10:41:25,545 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 75 predicate places. [2024-05-12 10:41:25,545 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 1114 flow [2024-05-12 10:41:25,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:25,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:25,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:25,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:41:25,546 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:25,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1080221343, now seen corresponding path program 1 times [2024-05-12 10:41:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:25,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654402194] [2024-05-12 10:41:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:25,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:25,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654402194] [2024-05-12 10:41:25,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654402194] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:25,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:25,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710137146] [2024-05-12 10:41:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:25,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:25,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:25,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:25,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 1114 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:25,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:25,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:25,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:26,186 INFO L124 PetriNetUnfolderBase]: 1917/3128 cut-off events. [2024-05-12 10:41:26,186 INFO L125 PetriNetUnfolderBase]: For 37794/37798 co-relation queries the response was YES. [2024-05-12 10:41:26,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14755 conditions, 3128 events. 1917/3128 cut-off events. For 37794/37798 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18589 event pairs, 416 based on Foata normal form. 6/3123 useless extension candidates. Maximal degree in co-relation 14697. Up to 2620 conditions per place. [2024-05-12 10:41:26,208 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 126 selfloop transitions, 34 changer transitions 0/173 dead transitions. [2024-05-12 10:41:26,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 173 transitions, 1757 flow [2024-05-12 10:41:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:41:26,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-05-12 10:41:26,210 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 1114 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:41:26,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 173 transitions, 1757 flow [2024-05-12 10:41:26,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 173 transitions, 1663 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:26,259 INFO L231 Difference]: Finished difference. Result has 128 places, 147 transitions, 1303 flow [2024-05-12 10:41:26,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1303, PETRI_PLACES=128, PETRI_TRANSITIONS=147} [2024-05-12 10:41:26,260 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 77 predicate places. [2024-05-12 10:41:26,260 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 147 transitions, 1303 flow [2024-05-12 10:41:26,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:26,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:26,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:26,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:41:26,260 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:26,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2042527265, now seen corresponding path program 2 times [2024-05-12 10:41:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:26,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767927396] [2024-05-12 10:41:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:26,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:26,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767927396] [2024-05-12 10:41:26,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767927396] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:26,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:26,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:26,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020907334] [2024-05-12 10:41:26,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:26,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:26,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:26,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:26,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:26,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:26,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 147 transitions, 1303 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:26,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:26,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:26,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:26,891 INFO L124 PetriNetUnfolderBase]: 1939/3164 cut-off events. [2024-05-12 10:41:26,891 INFO L125 PetriNetUnfolderBase]: For 41054/41058 co-relation queries the response was YES. [2024-05-12 10:41:26,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15422 conditions, 3164 events. 1939/3164 cut-off events. For 41054/41058 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18890 event pairs, 416 based on Foata normal form. 6/3160 useless extension candidates. Maximal degree in co-relation 15361. Up to 2640 conditions per place. [2024-05-12 10:41:26,912 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 123 selfloop transitions, 38 changer transitions 0/174 dead transitions. [2024-05-12 10:41:26,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 174 transitions, 1824 flow [2024-05-12 10:41:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-05-12 10:41:26,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6510638297872341 [2024-05-12 10:41:26,913 INFO L175 Difference]: Start difference. First operand has 128 places, 147 transitions, 1303 flow. Second operand 5 states and 153 transitions. [2024-05-12 10:41:26,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 174 transitions, 1824 flow [2024-05-12 10:41:26,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 174 transitions, 1784 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-05-12 10:41:26,976 INFO L231 Difference]: Finished difference. Result has 133 places, 151 transitions, 1400 flow [2024-05-12 10:41:26,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1400, PETRI_PLACES=133, PETRI_TRANSITIONS=151} [2024-05-12 10:41:26,977 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 82 predicate places. [2024-05-12 10:41:26,977 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 151 transitions, 1400 flow [2024-05-12 10:41:26,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:26,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:26,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:26,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:41:26,977 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:26,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:26,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2042972735, now seen corresponding path program 3 times [2024-05-12 10:41:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:26,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631097388] [2024-05-12 10:41:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:26,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:27,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:27,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631097388] [2024-05-12 10:41:27,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631097388] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:27,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:27,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:27,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831152360] [2024-05-12 10:41:27,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:27,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:27,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:27,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:27,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:27,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 151 transitions, 1400 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:27,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:27,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:27,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:27,634 INFO L124 PetriNetUnfolderBase]: 1977/3391 cut-off events. [2024-05-12 10:41:27,634 INFO L125 PetriNetUnfolderBase]: For 45000/45000 co-relation queries the response was YES. [2024-05-12 10:41:27,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16213 conditions, 3391 events. 1977/3391 cut-off events. For 45000/45000 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 20836 event pairs, 536 based on Foata normal form. 2/3386 useless extension candidates. Maximal degree in co-relation 16149. Up to 2739 conditions per place. [2024-05-12 10:41:27,658 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 136 selfloop transitions, 34 changer transitions 0/183 dead transitions. [2024-05-12 10:41:27,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 183 transitions, 1952 flow [2024-05-12 10:41:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-05-12 10:41:27,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-05-12 10:41:27,659 INFO L175 Difference]: Start difference. First operand has 133 places, 151 transitions, 1400 flow. Second operand 5 states and 155 transitions. [2024-05-12 10:41:27,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 183 transitions, 1952 flow [2024-05-12 10:41:27,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 1856 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:27,719 INFO L231 Difference]: Finished difference. Result has 136 places, 158 transitions, 1531 flow [2024-05-12 10:41:27,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1531, PETRI_PLACES=136, PETRI_TRANSITIONS=158} [2024-05-12 10:41:27,719 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 85 predicate places. [2024-05-12 10:41:27,719 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 158 transitions, 1531 flow [2024-05-12 10:41:27,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:27,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:27,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:27,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:41:27,720 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:27,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2031292473, now seen corresponding path program 1 times [2024-05-12 10:41:27,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:27,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97561945] [2024-05-12 10:41:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:27,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:27,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97561945] [2024-05-12 10:41:27,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97561945] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:27,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:27,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:27,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897679831] [2024-05-12 10:41:27,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:27,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:27,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:27,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:28,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:28,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 158 transitions, 1531 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:28,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:28,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:28,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:28,367 INFO L124 PetriNetUnfolderBase]: 2013/3351 cut-off events. [2024-05-12 10:41:28,367 INFO L125 PetriNetUnfolderBase]: For 46720/46720 co-relation queries the response was YES. [2024-05-12 10:41:28,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16520 conditions, 3351 events. 2013/3351 cut-off events. For 46720/46720 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20447 event pairs, 462 based on Foata normal form. 2/3343 useless extension candidates. Maximal degree in co-relation 16455. Up to 2715 conditions per place. [2024-05-12 10:41:28,392 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 144 selfloop transitions, 38 changer transitions 0/195 dead transitions. [2024-05-12 10:41:28,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 195 transitions, 2177 flow [2024-05-12 10:41:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:41:28,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-05-12 10:41:28,394 INFO L175 Difference]: Start difference. First operand has 136 places, 158 transitions, 1531 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:41:28,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 195 transitions, 2177 flow [2024-05-12 10:41:28,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 195 transitions, 2128 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-05-12 10:41:28,464 INFO L231 Difference]: Finished difference. Result has 140 places, 169 transitions, 1695 flow [2024-05-12 10:41:28,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1695, PETRI_PLACES=140, PETRI_TRANSITIONS=169} [2024-05-12 10:41:28,465 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 89 predicate places. [2024-05-12 10:41:28,465 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 169 transitions, 1695 flow [2024-05-12 10:41:28,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:28,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:28,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:28,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:41:28,465 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:28,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:28,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2031412443, now seen corresponding path program 2 times [2024-05-12 10:41:28,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:28,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932473352] [2024-05-12 10:41:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:28,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:28,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:28,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932473352] [2024-05-12 10:41:28,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932473352] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:28,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:28,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:28,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042992723] [2024-05-12 10:41:28,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:28,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:28,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:28,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:28,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:28,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:28,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 169 transitions, 1695 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:28,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:28,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:28,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:29,079 INFO L124 PetriNetUnfolderBase]: 2057/3348 cut-off events. [2024-05-12 10:41:29,079 INFO L125 PetriNetUnfolderBase]: For 50793/50793 co-relation queries the response was YES. [2024-05-12 10:41:29,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17409 conditions, 3348 events. 2057/3348 cut-off events. For 50793/50793 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 20148 event pairs, 417 based on Foata normal form. 2/3342 useless extension candidates. Maximal degree in co-relation 17343. Up to 2862 conditions per place. [2024-05-12 10:41:29,104 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 154 selfloop transitions, 31 changer transitions 0/198 dead transitions. [2024-05-12 10:41:29,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 198 transitions, 2237 flow [2024-05-12 10:41:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 10:41:29,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028368794326241 [2024-05-12 10:41:29,105 INFO L175 Difference]: Start difference. First operand has 140 places, 169 transitions, 1695 flow. Second operand 6 states and 170 transitions. [2024-05-12 10:41:29,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 198 transitions, 2237 flow [2024-05-12 10:41:29,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 198 transitions, 2161 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-05-12 10:41:29,190 INFO L231 Difference]: Finished difference. Result has 145 places, 177 transitions, 1820 flow [2024-05-12 10:41:29,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1820, PETRI_PLACES=145, PETRI_TRANSITIONS=177} [2024-05-12 10:41:29,191 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 94 predicate places. [2024-05-12 10:41:29,191 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 177 transitions, 1820 flow [2024-05-12 10:41:29,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:29,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:29,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:29,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:41:29,191 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:29,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2034818019, now seen corresponding path program 1 times [2024-05-12 10:41:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:29,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230840354] [2024-05-12 10:41:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:29,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:29,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:29,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230840354] [2024-05-12 10:41:29,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230840354] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:29,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:29,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:29,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452545353] [2024-05-12 10:41:29,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:29,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:29,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:29,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:29,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:29,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 177 transitions, 1820 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:29,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:29,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:29,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:29,775 INFO L124 PetriNetUnfolderBase]: 2079/3385 cut-off events. [2024-05-12 10:41:29,775 INFO L125 PetriNetUnfolderBase]: For 54616/54616 co-relation queries the response was YES. [2024-05-12 10:41:29,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17792 conditions, 3385 events. 2079/3385 cut-off events. For 54616/54616 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20424 event pairs, 438 based on Foata normal form. 2/3371 useless extension candidates. Maximal degree in co-relation 17723. Up to 2789 conditions per place. [2024-05-12 10:41:29,802 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 139 selfloop transitions, 52 changer transitions 0/204 dead transitions. [2024-05-12 10:41:29,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 204 transitions, 2423 flow [2024-05-12 10:41:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 10:41:29,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-05-12 10:41:29,803 INFO L175 Difference]: Start difference. First operand has 145 places, 177 transitions, 1820 flow. Second operand 6 states and 174 transitions. [2024-05-12 10:41:29,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 204 transitions, 2423 flow [2024-05-12 10:41:29,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 204 transitions, 2338 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:29,904 INFO L231 Difference]: Finished difference. Result has 148 places, 181 transitions, 1907 flow [2024-05-12 10:41:29,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1907, PETRI_PLACES=148, PETRI_TRANSITIONS=181} [2024-05-12 10:41:29,904 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 97 predicate places. [2024-05-12 10:41:29,904 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 181 transitions, 1907 flow [2024-05-12 10:41:29,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:29,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:29,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:29,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:41:29,905 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:29,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2042979679, now seen corresponding path program 2 times [2024-05-12 10:41:29,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:29,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659077789] [2024-05-12 10:41:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:29,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:30,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:30,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659077789] [2024-05-12 10:41:30,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659077789] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:30,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:30,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:30,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196632441] [2024-05-12 10:41:30,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:30,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:30,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:30,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:30,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:30,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:30,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 181 transitions, 1907 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:30,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:30,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:30,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:30,552 INFO L124 PetriNetUnfolderBase]: 2071/3462 cut-off events. [2024-05-12 10:41:30,552 INFO L125 PetriNetUnfolderBase]: For 56907/56907 co-relation queries the response was YES. [2024-05-12 10:41:30,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17931 conditions, 3462 events. 2071/3462 cut-off events. For 56907/56907 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21324 event pairs, 444 based on Foata normal form. 2/3454 useless extension candidates. Maximal degree in co-relation 17861. Up to 2860 conditions per place. [2024-05-12 10:41:30,579 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 154 selfloop transitions, 38 changer transitions 0/205 dead transitions. [2024-05-12 10:41:30,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 205 transitions, 2349 flow [2024-05-12 10:41:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-05-12 10:41:30,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6553191489361702 [2024-05-12 10:41:30,581 INFO L175 Difference]: Start difference. First operand has 148 places, 181 transitions, 1907 flow. Second operand 5 states and 154 transitions. [2024-05-12 10:41:30,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 205 transitions, 2349 flow [2024-05-12 10:41:30,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 205 transitions, 2182 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:30,700 INFO L231 Difference]: Finished difference. Result has 149 places, 181 transitions, 1840 flow [2024-05-12 10:41:30,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1840, PETRI_PLACES=149, PETRI_TRANSITIONS=181} [2024-05-12 10:41:30,700 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 98 predicate places. [2024-05-12 10:41:30,700 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 181 transitions, 1840 flow [2024-05-12 10:41:30,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:30,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:30,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:30,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:41:30,701 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:30,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2058829669, now seen corresponding path program 3 times [2024-05-12 10:41:30,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:30,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103477525] [2024-05-12 10:41:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:30,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:30,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:30,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103477525] [2024-05-12 10:41:30,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103477525] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:30,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:30,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:30,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365064033] [2024-05-12 10:41:30,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:30,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:30,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:30,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:30,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:30,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 181 transitions, 1840 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:30,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:30,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:30,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:31,286 INFO L124 PetriNetUnfolderBase]: 2079/3388 cut-off events. [2024-05-12 10:41:31,286 INFO L125 PetriNetUnfolderBase]: For 58539/58539 co-relation queries the response was YES. [2024-05-12 10:41:31,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17877 conditions, 3388 events. 2079/3388 cut-off events. For 58539/58539 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20430 event pairs, 438 based on Foata normal form. 2/3374 useless extension candidates. Maximal degree in co-relation 17807. Up to 2791 conditions per place. [2024-05-12 10:41:31,312 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 136 selfloop transitions, 55 changer transitions 0/204 dead transitions. [2024-05-12 10:41:31,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 204 transitions, 2429 flow [2024-05-12 10:41:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-05-12 10:41:31,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-05-12 10:41:31,313 INFO L175 Difference]: Start difference. First operand has 149 places, 181 transitions, 1840 flow. Second operand 5 states and 150 transitions. [2024-05-12 10:41:31,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 204 transitions, 2429 flow [2024-05-12 10:41:31,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 204 transitions, 2353 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:31,421 INFO L231 Difference]: Finished difference. Result has 150 places, 184 transitions, 1931 flow [2024-05-12 10:41:31,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1931, PETRI_PLACES=150, PETRI_TRANSITIONS=184} [2024-05-12 10:41:31,421 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 99 predicate places. [2024-05-12 10:41:31,421 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 184 transitions, 1931 flow [2024-05-12 10:41:31,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:31,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:31,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:31,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:41:31,422 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:31,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:31,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2042742343, now seen corresponding path program 3 times [2024-05-12 10:41:31,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:31,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853020385] [2024-05-12 10:41:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:31,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:31,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:31,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853020385] [2024-05-12 10:41:31,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853020385] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:31,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:31,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:31,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22011717] [2024-05-12 10:41:31,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:31,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:31,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:31,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:31,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:31,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 184 transitions, 1931 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:31,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:31,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:31,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:32,083 INFO L124 PetriNetUnfolderBase]: 2087/3490 cut-off events. [2024-05-12 10:41:32,084 INFO L125 PetriNetUnfolderBase]: For 61984/61984 co-relation queries the response was YES. [2024-05-12 10:41:32,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18255 conditions, 3490 events. 2087/3490 cut-off events. For 61984/61984 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21495 event pairs, 451 based on Foata normal form. 2/3484 useless extension candidates. Maximal degree in co-relation 18184. Up to 2817 conditions per place. [2024-05-12 10:41:32,113 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 155 selfloop transitions, 47 changer transitions 0/215 dead transitions. [2024-05-12 10:41:32,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 215 transitions, 2501 flow [2024-05-12 10:41:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:32,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 10:41:32,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-05-12 10:41:32,115 INFO L175 Difference]: Start difference. First operand has 150 places, 184 transitions, 1931 flow. Second operand 6 states and 178 transitions. [2024-05-12 10:41:32,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 215 transitions, 2501 flow [2024-05-12 10:41:32,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 215 transitions, 2363 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:32,229 INFO L231 Difference]: Finished difference. Result has 154 places, 187 transitions, 1967 flow [2024-05-12 10:41:32,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1967, PETRI_PLACES=154, PETRI_TRANSITIONS=187} [2024-05-12 10:41:32,230 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 103 predicate places. [2024-05-12 10:41:32,230 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 187 transitions, 1967 flow [2024-05-12 10:41:32,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:32,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:32,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:32,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:41:32,230 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:32,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2042988607, now seen corresponding path program 1 times [2024-05-12 10:41:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:32,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46640492] [2024-05-12 10:41:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:32,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:32,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:32,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46640492] [2024-05-12 10:41:32,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46640492] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:32,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:32,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:41:32,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111281195] [2024-05-12 10:41:32,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:32,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:41:32,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:41:32,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:41:32,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-05-12 10:41:32,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 187 transitions, 1967 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:32,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:32,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-05-12 10:41:32,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:32,830 INFO L124 PetriNetUnfolderBase]: 1996/3348 cut-off events. [2024-05-12 10:41:32,831 INFO L125 PetriNetUnfolderBase]: For 58821/58831 co-relation queries the response was YES. [2024-05-12 10:41:32,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17462 conditions, 3348 events. 1996/3348 cut-off events. For 58821/58831 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20729 event pairs, 709 based on Foata normal form. 12/3331 useless extension candidates. Maximal degree in co-relation 17390. Up to 2704 conditions per place. [2024-05-12 10:41:32,858 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 152 selfloop transitions, 10 changer transitions 0/202 dead transitions. [2024-05-12 10:41:32,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 202 transitions, 2345 flow [2024-05-12 10:41:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:41:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:41:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-05-12 10:41:32,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-05-12 10:41:32,859 INFO L175 Difference]: Start difference. First operand has 154 places, 187 transitions, 1967 flow. Second operand 4 states and 119 transitions. [2024-05-12 10:41:32,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 202 transitions, 2345 flow [2024-05-12 10:41:32,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 202 transitions, 2254 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:32,939 INFO L231 Difference]: Finished difference. Result has 154 places, 189 transitions, 1929 flow [2024-05-12 10:41:32,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1929, PETRI_PLACES=154, PETRI_TRANSITIONS=189} [2024-05-12 10:41:32,940 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 103 predicate places. [2024-05-12 10:41:32,940 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 189 transitions, 1929 flow [2024-05-12 10:41:32,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:32,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:32,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:32,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:41:32,940 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:32,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:32,940 INFO L85 PathProgramCache]: Analyzing trace with hash 793122237, now seen corresponding path program 1 times [2024-05-12 10:41:32,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:32,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730940332] [2024-05-12 10:41:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:32,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:33,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:33,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730940332] [2024-05-12 10:41:33,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730940332] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:33,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:33,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:33,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18723375] [2024-05-12 10:41:33,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:33,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:33,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:33,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:33,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:33,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:33,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 189 transitions, 1929 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:33,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:33,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:33,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:33,771 INFO L124 PetriNetUnfolderBase]: 2271/3843 cut-off events. [2024-05-12 10:41:33,771 INFO L125 PetriNetUnfolderBase]: For 71998/72002 co-relation queries the response was YES. [2024-05-12 10:41:33,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19688 conditions, 3843 events. 2271/3843 cut-off events. For 71998/72002 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 24577 event pairs, 519 based on Foata normal form. 12/3812 useless extension candidates. Maximal degree in co-relation 19615. Up to 2636 conditions per place. [2024-05-12 10:41:33,799 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 201 selfloop transitions, 49 changer transitions 0/263 dead transitions. [2024-05-12 10:41:33,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 263 transitions, 2770 flow [2024-05-12 10:41:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 296 transitions. [2024-05-12 10:41:33,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6297872340425532 [2024-05-12 10:41:33,801 INFO L175 Difference]: Start difference. First operand has 154 places, 189 transitions, 1929 flow. Second operand 10 states and 296 transitions. [2024-05-12 10:41:33,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 263 transitions, 2770 flow [2024-05-12 10:41:33,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 263 transitions, 2733 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-05-12 10:41:33,895 INFO L231 Difference]: Finished difference. Result has 164 places, 194 transitions, 2070 flow [2024-05-12 10:41:33,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2070, PETRI_PLACES=164, PETRI_TRANSITIONS=194} [2024-05-12 10:41:33,896 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-05-12 10:41:33,896 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 194 transitions, 2070 flow [2024-05-12 10:41:33,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:33,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:33,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:33,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:41:33,896 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:33,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:33,897 INFO L85 PathProgramCache]: Analyzing trace with hash 425521131, now seen corresponding path program 2 times [2024-05-12 10:41:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:33,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853869390] [2024-05-12 10:41:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:34,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:34,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853869390] [2024-05-12 10:41:34,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853869390] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:34,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:34,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:34,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192399580] [2024-05-12 10:41:34,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:34,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:34,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:34,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:34,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 194 transitions, 2070 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:34,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:34,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:34,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:34,696 INFO L124 PetriNetUnfolderBase]: 2365/4015 cut-off events. [2024-05-12 10:41:34,697 INFO L125 PetriNetUnfolderBase]: For 79303/79307 co-relation queries the response was YES. [2024-05-12 10:41:34,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20958 conditions, 4015 events. 2365/4015 cut-off events. For 79303/79307 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25943 event pairs, 746 based on Foata normal form. 16/3985 useless extension candidates. Maximal degree in co-relation 20882. Up to 3114 conditions per place. [2024-05-12 10:41:34,730 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 191 selfloop transitions, 46 changer transitions 0/250 dead transitions. [2024-05-12 10:41:34,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 250 transitions, 2701 flow [2024-05-12 10:41:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2024-05-12 10:41:34,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-05-12 10:41:34,732 INFO L175 Difference]: Start difference. First operand has 164 places, 194 transitions, 2070 flow. Second operand 9 states and 264 transitions. [2024-05-12 10:41:34,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 250 transitions, 2701 flow [2024-05-12 10:41:34,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 250 transitions, 2627 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:34,907 INFO L231 Difference]: Finished difference. Result has 168 places, 195 transitions, 2114 flow [2024-05-12 10:41:34,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2114, PETRI_PLACES=168, PETRI_TRANSITIONS=195} [2024-05-12 10:41:34,908 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-05-12 10:41:34,908 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 195 transitions, 2114 flow [2024-05-12 10:41:34,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:34,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:34,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:34,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:41:34,908 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:34,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:34,909 INFO L85 PathProgramCache]: Analyzing trace with hash 794996187, now seen corresponding path program 3 times [2024-05-12 10:41:34,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:34,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700616925] [2024-05-12 10:41:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:34,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:35,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700616925] [2024-05-12 10:41:35,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700616925] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:35,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:35,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:35,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600548627] [2024-05-12 10:41:35,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:35,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:35,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:35,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:35,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 195 transitions, 2114 flow. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:35,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:35,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:35,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:35,765 INFO L124 PetriNetUnfolderBase]: 2432/3996 cut-off events. [2024-05-12 10:41:35,766 INFO L125 PetriNetUnfolderBase]: For 82117/82121 co-relation queries the response was YES. [2024-05-12 10:41:35,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21648 conditions, 3996 events. 2432/3996 cut-off events. For 82117/82121 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25205 event pairs, 447 based on Foata normal form. 12/4000 useless extension candidates. Maximal degree in co-relation 21570. Up to 3098 conditions per place. [2024-05-12 10:41:35,801 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 195 selfloop transitions, 48 changer transitions 0/256 dead transitions. [2024-05-12 10:41:35,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 256 transitions, 2795 flow [2024-05-12 10:41:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2024-05-12 10:41:35,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-05-12 10:41:35,802 INFO L175 Difference]: Start difference. First operand has 168 places, 195 transitions, 2114 flow. Second operand 9 states and 267 transitions. [2024-05-12 10:41:35,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 256 transitions, 2795 flow [2024-05-12 10:41:35,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 256 transitions, 2698 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:35,971 INFO L231 Difference]: Finished difference. Result has 171 places, 198 transitions, 2172 flow [2024-05-12 10:41:35,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2172, PETRI_PLACES=171, PETRI_TRANSITIONS=198} [2024-05-12 10:41:35,971 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-05-12 10:41:35,972 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 198 transitions, 2172 flow [2024-05-12 10:41:35,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:35,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:35,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:35,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 10:41:35,972 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:35,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:35,972 INFO L85 PathProgramCache]: Analyzing trace with hash 153410219, now seen corresponding path program 4 times [2024-05-12 10:41:35,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:35,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665420322] [2024-05-12 10:41:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:35,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:36,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:36,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665420322] [2024-05-12 10:41:36,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665420322] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:36,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:36,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:36,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404456518] [2024-05-12 10:41:36,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:36,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:36,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:36,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:36,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:36,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 198 transitions, 2172 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:36,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:36,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:36,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:36,912 INFO L124 PetriNetUnfolderBase]: 2526/4193 cut-off events. [2024-05-12 10:41:36,912 INFO L125 PetriNetUnfolderBase]: For 89523/89523 co-relation queries the response was YES. [2024-05-12 10:41:36,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22492 conditions, 4193 events. 2526/4193 cut-off events. For 89523/89523 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26943 event pairs, 688 based on Foata normal form. 16/4181 useless extension candidates. Maximal degree in co-relation 22412. Up to 3373 conditions per place. [2024-05-12 10:41:36,948 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 196 selfloop transitions, 48 changer transitions 0/257 dead transitions. [2024-05-12 10:41:36,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 257 transitions, 2822 flow [2024-05-12 10:41:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 286 transitions. [2024-05-12 10:41:36,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085106382978723 [2024-05-12 10:41:36,949 INFO L175 Difference]: Start difference. First operand has 171 places, 198 transitions, 2172 flow. Second operand 10 states and 286 transitions. [2024-05-12 10:41:36,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 257 transitions, 2822 flow [2024-05-12 10:41:37,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 257 transitions, 2750 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:37,117 INFO L231 Difference]: Finished difference. Result has 176 places, 199 transitions, 2221 flow [2024-05-12 10:41:37,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2221, PETRI_PLACES=176, PETRI_TRANSITIONS=199} [2024-05-12 10:41:37,118 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-05-12 10:41:37,118 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 199 transitions, 2221 flow [2024-05-12 10:41:37,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:37,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:37,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:37,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 10:41:37,118 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:37,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:37,119 INFO L85 PathProgramCache]: Analyzing trace with hash 104094939, now seen corresponding path program 5 times [2024-05-12 10:41:37,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:37,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560336468] [2024-05-12 10:41:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:37,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:37,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:37,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560336468] [2024-05-12 10:41:37,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560336468] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:37,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:37,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:37,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168852015] [2024-05-12 10:41:37,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:37,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:37,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:37,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:37,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:37,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 199 transitions, 2221 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:37,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:37,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:37,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:37,983 INFO L124 PetriNetUnfolderBase]: 2620/4291 cut-off events. [2024-05-12 10:41:37,983 INFO L125 PetriNetUnfolderBase]: For 93597/93597 co-relation queries the response was YES. [2024-05-12 10:41:38,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23406 conditions, 4291 events. 2620/4291 cut-off events. For 93597/93597 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27355 event pairs, 514 based on Foata normal form. 16/4299 useless extension candidates. Maximal degree in co-relation 23324. Up to 3523 conditions per place. [2024-05-12 10:41:38,013 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 193 selfloop transitions, 46 changer transitions 0/252 dead transitions. [2024-05-12 10:41:38,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 252 transitions, 2849 flow [2024-05-12 10:41:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-05-12 10:41:38,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193853427895981 [2024-05-12 10:41:38,014 INFO L175 Difference]: Start difference. First operand has 176 places, 199 transitions, 2221 flow. Second operand 9 states and 262 transitions. [2024-05-12 10:41:38,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 252 transitions, 2849 flow [2024-05-12 10:41:38,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 252 transitions, 2752 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:38,199 INFO L231 Difference]: Finished difference. Result has 178 places, 200 transitions, 2243 flow [2024-05-12 10:41:38,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2243, PETRI_PLACES=178, PETRI_TRANSITIONS=200} [2024-05-12 10:41:38,199 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 127 predicate places. [2024-05-12 10:41:38,199 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 200 transitions, 2243 flow [2024-05-12 10:41:38,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:38,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:38,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:38,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 10:41:38,200 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:38,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash 103947069, now seen corresponding path program 6 times [2024-05-12 10:41:38,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:38,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036091165] [2024-05-12 10:41:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:38,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:38,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:38,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036091165] [2024-05-12 10:41:38,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036091165] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:38,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:38,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:38,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819754925] [2024-05-12 10:41:38,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:38,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:38,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:38,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:38,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:38,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 200 transitions, 2243 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:38,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:38,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:38,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:38,977 INFO L124 PetriNetUnfolderBase]: 2652/4405 cut-off events. [2024-05-12 10:41:38,977 INFO L125 PetriNetUnfolderBase]: For 95080/95080 co-relation queries the response was YES. [2024-05-12 10:41:39,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23618 conditions, 4405 events. 2652/4405 cut-off events. For 95080/95080 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28446 event pairs, 544 based on Foata normal form. 12/4410 useless extension candidates. Maximal degree in co-relation 23535. Up to 3322 conditions per place. [2024-05-12 10:41:39,016 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 196 selfloop transitions, 49 changer transitions 0/258 dead transitions. [2024-05-12 10:41:39,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 258 transitions, 2921 flow [2024-05-12 10:41:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2024-05-12 10:41:39,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-05-12 10:41:39,017 INFO L175 Difference]: Start difference. First operand has 178 places, 200 transitions, 2243 flow. Second operand 9 states and 264 transitions. [2024-05-12 10:41:39,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 258 transitions, 2921 flow [2024-05-12 10:41:39,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 258 transitions, 2820 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:39,227 INFO L231 Difference]: Finished difference. Result has 181 places, 203 transitions, 2303 flow [2024-05-12 10:41:39,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2303, PETRI_PLACES=181, PETRI_TRANSITIONS=203} [2024-05-12 10:41:39,229 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 130 predicate places. [2024-05-12 10:41:39,229 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 203 transitions, 2303 flow [2024-05-12 10:41:39,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:39,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:39,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:39,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 10:41:39,230 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:39,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:39,230 INFO L85 PathProgramCache]: Analyzing trace with hash 311021241, now seen corresponding path program 1 times [2024-05-12 10:41:39,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:39,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212811746] [2024-05-12 10:41:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:39,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:39,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:39,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212811746] [2024-05-12 10:41:39,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212811746] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:39,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:39,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:39,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441975776] [2024-05-12 10:41:39,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:39,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:39,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:39,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:39,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:39,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:39,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 203 transitions, 2303 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:39,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:39,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:39,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:40,092 INFO L124 PetriNetUnfolderBase]: 2719/4528 cut-off events. [2024-05-12 10:41:40,092 INFO L125 PetriNetUnfolderBase]: For 100567/100567 co-relation queries the response was YES. [2024-05-12 10:41:40,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24287 conditions, 4528 events. 2719/4528 cut-off events. For 100567/100567 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 29657 event pairs, 638 based on Foata normal form. 12/4514 useless extension candidates. Maximal degree in co-relation 24202. Up to 3273 conditions per place. [2024-05-12 10:41:40,133 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 198 selfloop transitions, 54 changer transitions 0/265 dead transitions. [2024-05-12 10:41:40,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 265 transitions, 2985 flow [2024-05-12 10:41:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 289 transitions. [2024-05-12 10:41:40,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148936170212767 [2024-05-12 10:41:40,134 INFO L175 Difference]: Start difference. First operand has 181 places, 203 transitions, 2303 flow. Second operand 10 states and 289 transitions. [2024-05-12 10:41:40,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 265 transitions, 2985 flow [2024-05-12 10:41:40,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 265 transitions, 2907 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:40,334 INFO L231 Difference]: Finished difference. Result has 186 places, 204 transitions, 2363 flow [2024-05-12 10:41:40,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2363, PETRI_PLACES=186, PETRI_TRANSITIONS=204} [2024-05-12 10:41:40,334 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 135 predicate places. [2024-05-12 10:41:40,334 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 204 transitions, 2363 flow [2024-05-12 10:41:40,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:40,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:40,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:40,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 10:41:40,335 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:40,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1480681175, now seen corresponding path program 7 times [2024-05-12 10:41:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497198237] [2024-05-12 10:41:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497198237] [2024-05-12 10:41:40,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497198237] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:40,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:40,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:40,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858528077] [2024-05-12 10:41:40,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:40,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:40,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:40,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:40,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 204 transitions, 2363 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:40,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:40,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:40,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:41,246 INFO L124 PetriNetUnfolderBase]: 2786/4742 cut-off events. [2024-05-12 10:41:41,246 INFO L125 PetriNetUnfolderBase]: For 106094/106098 co-relation queries the response was YES. [2024-05-12 10:41:41,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25277 conditions, 4742 events. 2786/4742 cut-off events. For 106094/106098 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31761 event pairs, 745 based on Foata normal form. 12/4702 useless extension candidates. Maximal degree in co-relation 25190. Up to 3570 conditions per place. [2024-05-12 10:41:41,288 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 199 selfloop transitions, 48 changer transitions 0/260 dead transitions. [2024-05-12 10:41:41,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 260 transitions, 3159 flow [2024-05-12 10:41:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:41:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:41:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-05-12 10:41:41,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462765957446809 [2024-05-12 10:41:41,289 INFO L175 Difference]: Start difference. First operand has 186 places, 204 transitions, 2363 flow. Second operand 8 states and 243 transitions. [2024-05-12 10:41:41,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 260 transitions, 3159 flow [2024-05-12 10:41:41,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 260 transitions, 3035 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:41,580 INFO L231 Difference]: Finished difference. Result has 187 places, 206 transitions, 2379 flow [2024-05-12 10:41:41,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2379, PETRI_PLACES=187, PETRI_TRANSITIONS=206} [2024-05-12 10:41:41,581 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 136 predicate places. [2024-05-12 10:41:41,581 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 206 transitions, 2379 flow [2024-05-12 10:41:41,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:41,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:41,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:41,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 10:41:41,582 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:41,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash 614590585, now seen corresponding path program 8 times [2024-05-12 10:41:41,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:41,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219190978] [2024-05-12 10:41:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:41,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:41,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:41,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219190978] [2024-05-12 10:41:41,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219190978] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:41,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:41,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:41,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546532404] [2024-05-12 10:41:41,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:41,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:41,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:41,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:41,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:41,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 206 transitions, 2379 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:41,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:41,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:41,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:42,423 INFO L124 PetriNetUnfolderBase]: 2880/4766 cut-off events. [2024-05-12 10:41:42,425 INFO L125 PetriNetUnfolderBase]: For 113305/113309 co-relation queries the response was YES. [2024-05-12 10:41:42,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25870 conditions, 4766 events. 2880/4766 cut-off events. For 113305/113309 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 31221 event pairs, 637 based on Foata normal form. 16/4764 useless extension candidates. Maximal degree in co-relation 25781. Up to 3947 conditions per place. [2024-05-12 10:41:42,469 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 197 selfloop transitions, 46 changer transitions 0/256 dead transitions. [2024-05-12 10:41:42,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 256 transitions, 3015 flow [2024-05-12 10:41:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:41:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:41:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-05-12 10:41:42,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-05-12 10:41:42,473 INFO L175 Difference]: Start difference. First operand has 187 places, 206 transitions, 2379 flow. Second operand 8 states and 238 transitions. [2024-05-12 10:41:42,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 256 transitions, 3015 flow [2024-05-12 10:41:42,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 256 transitions, 2863 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:42,741 INFO L231 Difference]: Finished difference. Result has 188 places, 207 transitions, 2352 flow [2024-05-12 10:41:42,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2352, PETRI_PLACES=188, PETRI_TRANSITIONS=207} [2024-05-12 10:41:42,741 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 137 predicate places. [2024-05-12 10:41:42,741 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 207 transitions, 2352 flow [2024-05-12 10:41:42,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:42,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:42,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:42,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 10:41:42,742 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:42,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:42,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1797220683, now seen corresponding path program 9 times [2024-05-12 10:41:42,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:42,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508109191] [2024-05-12 10:41:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:42,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:42,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:42,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508109191] [2024-05-12 10:41:42,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508109191] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:42,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:42,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:42,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580757121] [2024-05-12 10:41:42,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:42,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:42,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:42,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:42,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:42,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 207 transitions, 2352 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:42,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:42,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:42,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:43,601 INFO L124 PetriNetUnfolderBase]: 2974/5102 cut-off events. [2024-05-12 10:41:43,601 INFO L125 PetriNetUnfolderBase]: For 119108/119112 co-relation queries the response was YES. [2024-05-12 10:41:43,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26394 conditions, 5102 events. 2974/5102 cut-off events. For 119108/119112 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34947 event pairs, 979 based on Foata normal form. 20/5063 useless extension candidates. Maximal degree in co-relation 26305. Up to 4097 conditions per place. [2024-05-12 10:41:43,647 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 201 selfloop transitions, 46 changer transitions 0/260 dead transitions. [2024-05-12 10:41:43,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 260 transitions, 3000 flow [2024-05-12 10:41:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-05-12 10:41:43,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.607565011820331 [2024-05-12 10:41:43,648 INFO L175 Difference]: Start difference. First operand has 188 places, 207 transitions, 2352 flow. Second operand 9 states and 257 transitions. [2024-05-12 10:41:43,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 260 transitions, 3000 flow [2024-05-12 10:41:43,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 260 transitions, 2901 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:43,844 INFO L231 Difference]: Finished difference. Result has 191 places, 208 transitions, 2376 flow [2024-05-12 10:41:43,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2376, PETRI_PLACES=191, PETRI_TRANSITIONS=208} [2024-05-12 10:41:43,845 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 140 predicate places. [2024-05-12 10:41:43,845 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 208 transitions, 2376 flow [2024-05-12 10:41:43,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:43,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:43,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:43,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 10:41:43,846 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:43,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash 813892375, now seen corresponding path program 10 times [2024-05-12 10:41:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789232335] [2024-05-12 10:41:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:43,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:44,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:44,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789232335] [2024-05-12 10:41:44,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789232335] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:44,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:44,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:44,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916473810] [2024-05-12 10:41:44,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:44,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:44,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:44,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:44,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:44,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 208 transitions, 2376 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:44,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:44,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:44,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:44,769 INFO L124 PetriNetUnfolderBase]: 2946/4983 cut-off events. [2024-05-12 10:41:44,770 INFO L125 PetriNetUnfolderBase]: For 111743/111747 co-relation queries the response was YES. [2024-05-12 10:41:44,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25592 conditions, 4983 events. 2946/4983 cut-off events. For 111743/111747 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33317 event pairs, 686 based on Foata normal form. 16/4991 useless extension candidates. Maximal degree in co-relation 25502. Up to 4053 conditions per place. [2024-05-12 10:41:44,806 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 210 selfloop transitions, 47 changer transitions 0/270 dead transitions. [2024-05-12 10:41:44,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 270 transitions, 3068 flow [2024-05-12 10:41:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 290 transitions. [2024-05-12 10:41:44,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-05-12 10:41:44,807 INFO L175 Difference]: Start difference. First operand has 191 places, 208 transitions, 2376 flow. Second operand 10 states and 290 transitions. [2024-05-12 10:41:44,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 270 transitions, 3068 flow [2024-05-12 10:41:45,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 270 transitions, 2947 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:45,025 INFO L231 Difference]: Finished difference. Result has 194 places, 209 transitions, 2382 flow [2024-05-12 10:41:45,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2382, PETRI_PLACES=194, PETRI_TRANSITIONS=209} [2024-05-12 10:41:45,026 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 143 predicate places. [2024-05-12 10:41:45,026 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 209 transitions, 2382 flow [2024-05-12 10:41:45,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:45,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:45,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:45,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 10:41:45,026 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:45,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:45,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1789596171, now seen corresponding path program 2 times [2024-05-12 10:41:45,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:45,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811323173] [2024-05-12 10:41:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:45,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:45,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:45,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811323173] [2024-05-12 10:41:45,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811323173] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:45,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:45,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:45,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382823009] [2024-05-12 10:41:45,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:45,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:45,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:45,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:45,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:45,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:45,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 209 transitions, 2382 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:45,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:45,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:45,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:45,930 INFO L124 PetriNetUnfolderBase]: 3013/5193 cut-off events. [2024-05-12 10:41:45,930 INFO L125 PetriNetUnfolderBase]: For 113201/113205 co-relation queries the response was YES. [2024-05-12 10:41:45,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25947 conditions, 5193 events. 3013/5193 cut-off events. For 113201/113205 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 35890 event pairs, 961 based on Foata normal form. 16/5152 useless extension candidates. Maximal degree in co-relation 25856. Up to 4037 conditions per place. [2024-05-12 10:41:45,976 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 209 selfloop transitions, 49 changer transitions 0/271 dead transitions. [2024-05-12 10:41:45,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 271 transitions, 3078 flow [2024-05-12 10:41:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-05-12 10:41:45,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-05-12 10:41:45,977 INFO L175 Difference]: Start difference. First operand has 194 places, 209 transitions, 2382 flow. Second operand 10 states and 285 transitions. [2024-05-12 10:41:45,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 271 transitions, 3078 flow [2024-05-12 10:41:46,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 271 transitions, 2983 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:46,194 INFO L231 Difference]: Finished difference. Result has 196 places, 210 transitions, 2417 flow [2024-05-12 10:41:46,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2417, PETRI_PLACES=196, PETRI_TRANSITIONS=210} [2024-05-12 10:41:46,195 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 145 predicate places. [2024-05-12 10:41:46,195 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 210 transitions, 2417 flow [2024-05-12 10:41:46,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:46,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:46,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:46,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 10:41:46,195 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:46,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1227735563, now seen corresponding path program 3 times [2024-05-12 10:41:46,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:46,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402984837] [2024-05-12 10:41:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:46,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:46,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:46,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402984837] [2024-05-12 10:41:46,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402984837] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:46,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:46,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:46,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918959006] [2024-05-12 10:41:46,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:46,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:46,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:46,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:46,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:46,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:46,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 210 transitions, 2417 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:46,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:46,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:46,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:47,232 INFO L124 PetriNetUnfolderBase]: 3080/5096 cut-off events. [2024-05-12 10:41:47,232 INFO L125 PetriNetUnfolderBase]: For 118722/118726 co-relation queries the response was YES. [2024-05-12 10:41:47,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26433 conditions, 5096 events. 3080/5096 cut-off events. For 118722/118726 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 33970 event pairs, 527 based on Foata normal form. 16/5108 useless extension candidates. Maximal degree in co-relation 26341. Up to 3052 conditions per place. [2024-05-12 10:41:47,282 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 195 selfloop transitions, 60 changer transitions 0/268 dead transitions. [2024-05-12 10:41:47,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 268 transitions, 3183 flow [2024-05-12 10:41:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2024-05-12 10:41:47,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-05-12 10:41:47,284 INFO L175 Difference]: Start difference. First operand has 196 places, 210 transitions, 2417 flow. Second operand 9 states and 261 transitions. [2024-05-12 10:41:47,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 268 transitions, 3183 flow [2024-05-12 10:41:47,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 268 transitions, 3067 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:47,586 INFO L231 Difference]: Finished difference. Result has 197 places, 211 transitions, 2453 flow [2024-05-12 10:41:47,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2453, PETRI_PLACES=197, PETRI_TRANSITIONS=211} [2024-05-12 10:41:47,587 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 146 predicate places. [2024-05-12 10:41:47,587 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 211 transitions, 2453 flow [2024-05-12 10:41:47,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:47,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:47,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:47,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 10:41:47,587 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:47,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash 814107577, now seen corresponding path program 4 times [2024-05-12 10:41:47,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:47,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371329336] [2024-05-12 10:41:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:47,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:47,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:47,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371329336] [2024-05-12 10:41:47,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371329336] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:47,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:47,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:47,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261757894] [2024-05-12 10:41:47,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:47,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:47,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:47,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:47,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 211 transitions, 2453 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:47,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:47,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:47,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:48,475 INFO L124 PetriNetUnfolderBase]: 3060/5240 cut-off events. [2024-05-12 10:41:48,476 INFO L125 PetriNetUnfolderBase]: For 113465/113469 co-relation queries the response was YES. [2024-05-12 10:41:48,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26159 conditions, 5240 events. 3060/5240 cut-off events. For 113465/113469 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 36130 event pairs, 965 based on Foata normal form. 12/5193 useless extension candidates. Maximal degree in co-relation 26066. Up to 3982 conditions per place. [2024-05-12 10:41:48,522 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 210 selfloop transitions, 51 changer transitions 0/274 dead transitions. [2024-05-12 10:41:48,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 274 transitions, 3065 flow [2024-05-12 10:41:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-05-12 10:41:48,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6191489361702127 [2024-05-12 10:41:48,524 INFO L175 Difference]: Start difference. First operand has 197 places, 211 transitions, 2453 flow. Second operand 10 states and 291 transitions. [2024-05-12 10:41:48,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 274 transitions, 3065 flow [2024-05-12 10:41:48,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 274 transitions, 2933 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:48,770 INFO L231 Difference]: Finished difference. Result has 199 places, 210 transitions, 2353 flow [2024-05-12 10:41:48,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2247, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2353, PETRI_PLACES=199, PETRI_TRANSITIONS=210} [2024-05-12 10:41:48,770 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 148 predicate places. [2024-05-12 10:41:48,771 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 210 transitions, 2353 flow [2024-05-12 10:41:48,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:48,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:48,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:48,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 10:41:48,771 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:48,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:48,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1128876950, now seen corresponding path program 1 times [2024-05-12 10:41:48,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:48,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575951673] [2024-05-12 10:41:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:48,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:49,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:49,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575951673] [2024-05-12 10:41:49,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575951673] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:49,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:49,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:49,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542280611] [2024-05-12 10:41:49,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:49,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:49,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:49,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:49,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:49,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 210 transitions, 2353 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:49,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:49,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:49,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:49,604 INFO L124 PetriNetUnfolderBase]: 3096/5253 cut-off events. [2024-05-12 10:41:49,604 INFO L125 PetriNetUnfolderBase]: For 105161/105161 co-relation queries the response was YES. [2024-05-12 10:41:49,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25975 conditions, 5253 events. 3096/5253 cut-off events. For 105161/105161 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35802 event pairs, 707 based on Foata normal form. 2/5236 useless extension candidates. Maximal degree in co-relation 25882. Up to 4185 conditions per place. [2024-05-12 10:41:49,650 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 159 selfloop transitions, 79 changer transitions 0/251 dead transitions. [2024-05-12 10:41:49,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 251 transitions, 3279 flow [2024-05-12 10:41:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:41:49,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6200607902735562 [2024-05-12 10:41:49,651 INFO L175 Difference]: Start difference. First operand has 199 places, 210 transitions, 2353 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:41:49,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 251 transitions, 3279 flow [2024-05-12 10:41:49,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 251 transitions, 3064 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-05-12 10:41:49,878 INFO L231 Difference]: Finished difference. Result has 195 places, 221 transitions, 2435 flow [2024-05-12 10:41:49,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2435, PETRI_PLACES=195, PETRI_TRANSITIONS=221} [2024-05-12 10:41:49,878 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 144 predicate places. [2024-05-12 10:41:49,879 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 221 transitions, 2435 flow [2024-05-12 10:41:49,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:49,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:49,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:49,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 10:41:49,879 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:49,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:49,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1345155344, now seen corresponding path program 2 times [2024-05-12 10:41:49,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:49,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489219446] [2024-05-12 10:41:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:49,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:50,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:50,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489219446] [2024-05-12 10:41:50,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489219446] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:50,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:50,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:50,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603741300] [2024-05-12 10:41:50,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:50,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:50,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:50,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:50,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 221 transitions, 2435 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:50,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:50,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:50,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:50,730 INFO L124 PetriNetUnfolderBase]: 3146/5317 cut-off events. [2024-05-12 10:41:50,730 INFO L125 PetriNetUnfolderBase]: For 110527/110527 co-relation queries the response was YES. [2024-05-12 10:41:50,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26098 conditions, 5317 events. 3146/5317 cut-off events. For 110527/110527 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36216 event pairs, 714 based on Foata normal form. 2/5302 useless extension candidates. Maximal degree in co-relation 26006. Up to 4446 conditions per place. [2024-05-12 10:41:50,779 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 177 selfloop transitions, 66 changer transitions 0/256 dead transitions. [2024-05-12 10:41:50,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 256 transitions, 3353 flow [2024-05-12 10:41:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:41:50,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60790273556231 [2024-05-12 10:41:50,781 INFO L175 Difference]: Start difference. First operand has 195 places, 221 transitions, 2435 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:41:50,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 256 transitions, 3353 flow [2024-05-12 10:41:51,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 256 transitions, 3216 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:51,091 INFO L231 Difference]: Finished difference. Result has 199 places, 229 transitions, 2553 flow [2024-05-12 10:41:51,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2553, PETRI_PLACES=199, PETRI_TRANSITIONS=229} [2024-05-12 10:41:51,091 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 148 predicate places. [2024-05-12 10:41:51,091 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 229 transitions, 2553 flow [2024-05-12 10:41:51,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:51,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:51,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:51,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 10:41:51,092 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:51,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1450716854, now seen corresponding path program 3 times [2024-05-12 10:41:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:51,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325358204] [2024-05-12 10:41:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:51,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:51,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:51,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325358204] [2024-05-12 10:41:51,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325358204] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:51,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:51,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:51,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931424946] [2024-05-12 10:41:51,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:51,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:51,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:51,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:51,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:51,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:51,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 229 transitions, 2553 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:51,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:51,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:51,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:51,970 INFO L124 PetriNetUnfolderBase]: 3140/5196 cut-off events. [2024-05-12 10:41:51,970 INFO L125 PetriNetUnfolderBase]: For 111402/111402 co-relation queries the response was YES. [2024-05-12 10:41:52,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25950 conditions, 5196 events. 3140/5196 cut-off events. For 111402/111402 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34856 event pairs, 627 based on Foata normal form. 2/5182 useless extension candidates. Maximal degree in co-relation 25856. Up to 4440 conditions per place. [2024-05-12 10:41:52,018 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 181 selfloop transitions, 67 changer transitions 0/261 dead transitions. [2024-05-12 10:41:52,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 261 transitions, 3299 flow [2024-05-12 10:41:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-05-12 10:41:52,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791962174940898 [2024-05-12 10:41:52,019 INFO L175 Difference]: Start difference. First operand has 199 places, 229 transitions, 2553 flow. Second operand 9 states and 245 transitions. [2024-05-12 10:41:52,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 261 transitions, 3299 flow [2024-05-12 10:41:52,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 261 transitions, 3175 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:52,239 INFO L231 Difference]: Finished difference. Result has 205 places, 229 transitions, 2570 flow [2024-05-12 10:41:52,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2570, PETRI_PLACES=205, PETRI_TRANSITIONS=229} [2024-05-12 10:41:52,240 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 154 predicate places. [2024-05-12 10:41:52,240 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 229 transitions, 2570 flow [2024-05-12 10:41:52,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:52,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:52,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:52,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 10:41:52,241 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:52,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1092138304, now seen corresponding path program 4 times [2024-05-12 10:41:52,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:52,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750229744] [2024-05-12 10:41:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:52,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:52,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:52,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750229744] [2024-05-12 10:41:52,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750229744] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:52,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:52,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:52,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704500010] [2024-05-12 10:41:52,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:52,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:52,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:52,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:52,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 229 transitions, 2570 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:52,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:52,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:52,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:53,114 INFO L124 PetriNetUnfolderBase]: 3223/5386 cut-off events. [2024-05-12 10:41:53,114 INFO L125 PetriNetUnfolderBase]: For 118303/118303 co-relation queries the response was YES. [2024-05-12 10:41:53,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27246 conditions, 5386 events. 3223/5386 cut-off events. For 118303/118303 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36525 event pairs, 613 based on Foata normal form. 2/5377 useless extension candidates. Maximal degree in co-relation 27150. Up to 4607 conditions per place. [2024-05-12 10:41:53,163 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 213 selfloop transitions, 53 changer transitions 0/279 dead transitions. [2024-05-12 10:41:53,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 279 transitions, 3552 flow [2024-05-12 10:41:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-05-12 10:41:53,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2024-05-12 10:41:53,165 INFO L175 Difference]: Start difference. First operand has 205 places, 229 transitions, 2570 flow. Second operand 6 states and 184 transitions. [2024-05-12 10:41:53,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 279 transitions, 3552 flow [2024-05-12 10:41:53,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 279 transitions, 3399 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:53,618 INFO L231 Difference]: Finished difference. Result has 205 places, 247 transitions, 2889 flow [2024-05-12 10:41:53,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2425, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2889, PETRI_PLACES=205, PETRI_TRANSITIONS=247} [2024-05-12 10:41:53,619 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 154 predicate places. [2024-05-12 10:41:53,619 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 247 transitions, 2889 flow [2024-05-12 10:41:53,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:53,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:53,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:53,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 10:41:53,619 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:53,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1099495534, now seen corresponding path program 5 times [2024-05-12 10:41:53,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:53,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972885914] [2024-05-12 10:41:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:53,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:53,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:53,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972885914] [2024-05-12 10:41:53,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972885914] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:53,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:53,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:53,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42966092] [2024-05-12 10:41:53,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:53,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:53,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:53,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:53,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:53,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 247 transitions, 2889 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:53,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:53,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:53,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:54,508 INFO L124 PetriNetUnfolderBase]: 3259/5394 cut-off events. [2024-05-12 10:41:54,509 INFO L125 PetriNetUnfolderBase]: For 124652/124652 co-relation queries the response was YES. [2024-05-12 10:41:54,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27982 conditions, 5394 events. 3259/5394 cut-off events. For 124652/124652 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36469 event pairs, 630 based on Foata normal form. 2/5381 useless extension candidates. Maximal degree in co-relation 27883. Up to 4378 conditions per place. [2024-05-12 10:41:54,565 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 168 selfloop transitions, 107 changer transitions 0/288 dead transitions. [2024-05-12 10:41:54,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 288 transitions, 3999 flow [2024-05-12 10:41:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-05-12 10:41:54,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322188449848024 [2024-05-12 10:41:54,566 INFO L175 Difference]: Start difference. First operand has 205 places, 247 transitions, 2889 flow. Second operand 7 states and 208 transitions. [2024-05-12 10:41:54,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 288 transitions, 3999 flow [2024-05-12 10:41:55,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 288 transitions, 3893 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:55,003 INFO L231 Difference]: Finished difference. Result has 210 places, 254 transitions, 3153 flow [2024-05-12 10:41:55,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3153, PETRI_PLACES=210, PETRI_TRANSITIONS=254} [2024-05-12 10:41:55,004 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 159 predicate places. [2024-05-12 10:41:55,004 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 254 transitions, 3153 flow [2024-05-12 10:41:55,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:55,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:55,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:55,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 10:41:55,005 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:55,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:55,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1099489954, now seen corresponding path program 6 times [2024-05-12 10:41:55,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:55,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378859261] [2024-05-12 10:41:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:55,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:55,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:55,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378859261] [2024-05-12 10:41:55,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378859261] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:55,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:55,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:55,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993264575] [2024-05-12 10:41:55,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:55,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:55,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:55,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:55,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 254 transitions, 3153 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:55,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:55,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:55,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:55,989 INFO L124 PetriNetUnfolderBase]: 3267/5595 cut-off events. [2024-05-12 10:41:55,989 INFO L125 PetriNetUnfolderBase]: For 132502/132502 co-relation queries the response was YES. [2024-05-12 10:41:56,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28725 conditions, 5595 events. 3267/5595 cut-off events. For 132502/132502 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 38881 event pairs, 704 based on Foata normal form. 2/5583 useless extension candidates. Maximal degree in co-relation 28624. Up to 4388 conditions per place. [2024-05-12 10:41:56,044 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 171 selfloop transitions, 113 changer transitions 0/297 dead transitions. [2024-05-12 10:41:56,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 297 transitions, 4245 flow [2024-05-12 10:41:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:56,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 256 transitions. [2024-05-12 10:41:56,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6052009456264775 [2024-05-12 10:41:56,045 INFO L175 Difference]: Start difference. First operand has 210 places, 254 transitions, 3153 flow. Second operand 9 states and 256 transitions. [2024-05-12 10:41:56,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 297 transitions, 4245 flow [2024-05-12 10:41:56,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 297 transitions, 3997 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:56,483 INFO L231 Difference]: Finished difference. Result has 214 places, 257 transitions, 3201 flow [2024-05-12 10:41:56,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3201, PETRI_PLACES=214, PETRI_TRANSITIONS=257} [2024-05-12 10:41:56,484 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 163 predicate places. [2024-05-12 10:41:56,484 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 257 transitions, 3201 flow [2024-05-12 10:41:56,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:56,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:56,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:56,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 10:41:56,484 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:56,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:56,485 INFO L85 PathProgramCache]: Analyzing trace with hash 964275810, now seen corresponding path program 1 times [2024-05-12 10:41:56,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:56,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001368168] [2024-05-12 10:41:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:56,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:56,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:56,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001368168] [2024-05-12 10:41:56,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001368168] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:56,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:56,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626524668] [2024-05-12 10:41:56,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:56,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:56,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:56,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 257 transitions, 3201 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) [2024-05-12 10:41:56,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:56,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:56,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:57,493 INFO L124 PetriNetUnfolderBase]: 3325/5540 cut-off events. [2024-05-12 10:41:57,493 INFO L125 PetriNetUnfolderBase]: For 133368/133372 co-relation queries the response was YES. [2024-05-12 10:41:57,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29029 conditions, 5540 events. 3325/5540 cut-off events. For 133368/133372 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37825 event pairs, 625 based on Foata normal form. 6/5529 useless extension candidates. Maximal degree in co-relation 28928. Up to 4589 conditions per place. [2024-05-12 10:41:57,547 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 217 selfloop transitions, 75 changer transitions 0/305 dead transitions. [2024-05-12 10:41:57,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 305 transitions, 4272 flow [2024-05-12 10:41:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 10:41:57,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352583586626139 [2024-05-12 10:41:57,548 INFO L175 Difference]: Start difference. First operand has 214 places, 257 transitions, 3201 flow. Second operand 7 states and 209 transitions. [2024-05-12 10:41:57,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 305 transitions, 4272 flow [2024-05-12 10:41:57,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 305 transitions, 3995 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:57,894 INFO L231 Difference]: Finished difference. Result has 214 places, 269 transitions, 3217 flow [2024-05-12 10:41:57,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3217, PETRI_PLACES=214, PETRI_TRANSITIONS=269} [2024-05-12 10:41:57,895 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 163 predicate places. [2024-05-12 10:41:57,895 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 269 transitions, 3217 flow [2024-05-12 10:41:57,895 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) [2024-05-12 10:41:57,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:57,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:57,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 10:41:57,895 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:57,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash -298165958, now seen corresponding path program 2 times [2024-05-12 10:41:57,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:57,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574477601] [2024-05-12 10:41:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:57,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:58,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:58,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574477601] [2024-05-12 10:41:58,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574477601] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:58,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:58,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:58,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644365346] [2024-05-12 10:41:58,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:58,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:58,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:58,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:58,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:58,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:58,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 269 transitions, 3217 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:58,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:58,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:58,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:58,908 INFO L124 PetriNetUnfolderBase]: 3397/5651 cut-off events. [2024-05-12 10:41:58,908 INFO L125 PetriNetUnfolderBase]: For 135509/135513 co-relation queries the response was YES. [2024-05-12 10:41:58,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29856 conditions, 5651 events. 3397/5651 cut-off events. For 135509/135513 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 38797 event pairs, 625 based on Foata normal form. 6/5641 useless extension candidates. Maximal degree in co-relation 29754. Up to 4548 conditions per place. [2024-05-12 10:41:58,967 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 224 selfloop transitions, 100 changer transitions 0/337 dead transitions. [2024-05-12 10:41:58,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 337 transitions, 4638 flow [2024-05-12 10:41:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:41:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:41:58,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 311 transitions. [2024-05-12 10:41:58,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6015473887814313 [2024-05-12 10:41:58,968 INFO L175 Difference]: Start difference. First operand has 214 places, 269 transitions, 3217 flow. Second operand 11 states and 311 transitions. [2024-05-12 10:41:58,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 337 transitions, 4638 flow [2024-05-12 10:41:59,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 337 transitions, 4497 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-05-12 10:41:59,372 INFO L231 Difference]: Finished difference. Result has 225 places, 284 transitions, 3501 flow [2024-05-12 10:41:59,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3096, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3501, PETRI_PLACES=225, PETRI_TRANSITIONS=284} [2024-05-12 10:41:59,373 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 174 predicate places. [2024-05-12 10:41:59,373 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 284 transitions, 3501 flow [2024-05-12 10:41:59,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:59,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:59,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:59,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 10:41:59,373 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:59,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:59,374 INFO L85 PathProgramCache]: Analyzing trace with hash 17309572, now seen corresponding path program 3 times [2024-05-12 10:41:59,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:59,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792779317] [2024-05-12 10:41:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:59,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:59,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:59,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792779317] [2024-05-12 10:41:59,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792779317] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:59,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:59,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:59,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600742688] [2024-05-12 10:41:59,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:59,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:59,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:59,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:41:59,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 284 transitions, 3501 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) [2024-05-12 10:41:59,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:59,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:41:59,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:00,514 INFO L124 PetriNetUnfolderBase]: 3391/5654 cut-off events. [2024-05-12 10:42:00,514 INFO L125 PetriNetUnfolderBase]: For 140631/140635 co-relation queries the response was YES. [2024-05-12 10:42:00,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30673 conditions, 5654 events. 3391/5654 cut-off events. For 140631/140635 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 38832 event pairs, 616 based on Foata normal form. 6/5646 useless extension candidates. Maximal degree in co-relation 30567. Up to 4543 conditions per place. [2024-05-12 10:42:00,561 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 222 selfloop transitions, 98 changer transitions 0/333 dead transitions. [2024-05-12 10:42:00,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 333 transitions, 4645 flow [2024-05-12 10:42:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:42:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:42:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 289 transitions. [2024-05-12 10:42:00,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148936170212767 [2024-05-12 10:42:00,562 INFO L175 Difference]: Start difference. First operand has 225 places, 284 transitions, 3501 flow. Second operand 10 states and 289 transitions. [2024-05-12 10:42:00,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 333 transitions, 4645 flow [2024-05-12 10:42:00,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 333 transitions, 4444 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:00,932 INFO L231 Difference]: Finished difference. Result has 230 places, 284 transitions, 3503 flow [2024-05-12 10:42:00,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3503, PETRI_PLACES=230, PETRI_TRANSITIONS=284} [2024-05-12 10:42:00,933 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 179 predicate places. [2024-05-12 10:42:00,933 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 284 transitions, 3503 flow [2024-05-12 10:42:00,933 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) [2024-05-12 10:42:00,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:00,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:00,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 10:42:00,934 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:00,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:00,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1147805204, now seen corresponding path program 1 times [2024-05-12 10:42:00,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:00,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150238461] [2024-05-12 10:42:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:00,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:01,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:01,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150238461] [2024-05-12 10:42:01,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150238461] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:01,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:01,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:01,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771350827] [2024-05-12 10:42:01,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:01,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:01,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:01,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:01,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:01,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:01,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 284 transitions, 3503 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:01,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:01,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:01,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:01,948 INFO L124 PetriNetUnfolderBase]: 3402/5651 cut-off events. [2024-05-12 10:42:01,948 INFO L125 PetriNetUnfolderBase]: For 142992/142996 co-relation queries the response was YES. [2024-05-12 10:42:01,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30891 conditions, 5651 events. 3402/5651 cut-off events. For 142992/142996 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 38745 event pairs, 626 based on Foata normal form. 5/5638 useless extension candidates. Maximal degree in co-relation 30784. Up to 4822 conditions per place. [2024-05-12 10:42:02,008 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 242 selfloop transitions, 61 changer transitions 0/316 dead transitions. [2024-05-12 10:42:02,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 316 transitions, 4437 flow [2024-05-12 10:42:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:02,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:42:02,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048632218844985 [2024-05-12 10:42:02,009 INFO L175 Difference]: Start difference. First operand has 230 places, 284 transitions, 3503 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:42:02,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 316 transitions, 4437 flow [2024-05-12 10:42:02,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 316 transitions, 4203 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-05-12 10:42:02,567 INFO L231 Difference]: Finished difference. Result has 227 places, 287 transitions, 3459 flow [2024-05-12 10:42:02,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3275, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3459, PETRI_PLACES=227, PETRI_TRANSITIONS=287} [2024-05-12 10:42:02,568 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 176 predicate places. [2024-05-12 10:42:02,568 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 287 transitions, 3459 flow [2024-05-12 10:42:02,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:02,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:02,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:02,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 10:42:02,569 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:02,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:02,569 INFO L85 PathProgramCache]: Analyzing trace with hash 17709410, now seen corresponding path program 1 times [2024-05-12 10:42:02,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:02,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659860940] [2024-05-12 10:42:02,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:02,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:02,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:02,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659860940] [2024-05-12 10:42:02,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659860940] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:02,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:02,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155861973] [2024-05-12 10:42:02,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:02,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:02,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:02,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:02,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 287 transitions, 3459 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:02,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:02,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:02,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:03,566 INFO L124 PetriNetUnfolderBase]: 3438/5709 cut-off events. [2024-05-12 10:42:03,566 INFO L125 PetriNetUnfolderBase]: For 151719/151723 co-relation queries the response was YES. [2024-05-12 10:42:03,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31029 conditions, 5709 events. 3438/5709 cut-off events. For 151719/151723 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 39135 event pairs, 629 based on Foata normal form. 8/5699 useless extension candidates. Maximal degree in co-relation 30922. Up to 4846 conditions per place. [2024-05-12 10:42:03,626 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 243 selfloop transitions, 64 changer transitions 0/320 dead transitions. [2024-05-12 10:42:03,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 320 transitions, 4399 flow [2024-05-12 10:42:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:42:03,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60790273556231 [2024-05-12 10:42:03,627 INFO L175 Difference]: Start difference. First operand has 227 places, 287 transitions, 3459 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:42:03,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 320 transitions, 4399 flow [2024-05-12 10:42:04,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 320 transitions, 4315 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:04,059 INFO L231 Difference]: Finished difference. Result has 231 places, 290 transitions, 3569 flow [2024-05-12 10:42:04,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3375, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3569, PETRI_PLACES=231, PETRI_TRANSITIONS=290} [2024-05-12 10:42:04,060 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 180 predicate places. [2024-05-12 10:42:04,060 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 290 transitions, 3569 flow [2024-05-12 10:42:04,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:04,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:04,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:04,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 10:42:04,061 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:04,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:04,061 INFO L85 PathProgramCache]: Analyzing trace with hash 496771934, now seen corresponding path program 4 times [2024-05-12 10:42:04,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:04,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656735749] [2024-05-12 10:42:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:04,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:04,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:04,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656735749] [2024-05-12 10:42:04,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656735749] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:04,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:04,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:04,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061417285] [2024-05-12 10:42:04,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:04,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:04,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:04,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:04,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:04,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 290 transitions, 3569 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) [2024-05-12 10:42:04,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:04,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:04,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:05,113 INFO L124 PetriNetUnfolderBase]: 3474/5762 cut-off events. [2024-05-12 10:42:05,113 INFO L125 PetriNetUnfolderBase]: For 157471/157471 co-relation queries the response was YES. [2024-05-12 10:42:05,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31669 conditions, 5762 events. 3474/5762 cut-off events. For 157471/157471 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 39523 event pairs, 585 based on Foata normal form. 2/5753 useless extension candidates. Maximal degree in co-relation 31560. Up to 4846 conditions per place. [2024-05-12 10:42:05,174 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 248 selfloop transitions, 70 changer transitions 0/331 dead transitions. [2024-05-12 10:42:05,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 331 transitions, 4459 flow [2024-05-12 10:42:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-05-12 10:42:05,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631205673758865 [2024-05-12 10:42:05,175 INFO L175 Difference]: Start difference. First operand has 231 places, 290 transitions, 3569 flow. Second operand 6 states and 187 transitions. [2024-05-12 10:42:05,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 331 transitions, 4459 flow [2024-05-12 10:42:05,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 331 transitions, 4287 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:05,886 INFO L231 Difference]: Finished difference. Result has 233 places, 297 transitions, 3683 flow [2024-05-12 10:42:05,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3397, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3683, PETRI_PLACES=233, PETRI_TRANSITIONS=297} [2024-05-12 10:42:05,887 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 182 predicate places. [2024-05-12 10:42:05,887 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 297 transitions, 3683 flow [2024-05-12 10:42:05,887 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) [2024-05-12 10:42:05,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:05,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:05,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 10:42:05,887 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:05,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash 68675264, now seen corresponding path program 5 times [2024-05-12 10:42:05,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:05,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68202001] [2024-05-12 10:42:05,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:05,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:06,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:06,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68202001] [2024-05-12 10:42:06,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68202001] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:06,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:06,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:06,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888735477] [2024-05-12 10:42:06,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:06,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:06,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:06,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:06,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:06,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 297 transitions, 3683 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) [2024-05-12 10:42:06,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:06,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:06,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:07,031 INFO L124 PetriNetUnfolderBase]: 3510/5832 cut-off events. [2024-05-12 10:42:07,031 INFO L125 PetriNetUnfolderBase]: For 164710/164714 co-relation queries the response was YES. [2024-05-12 10:42:07,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32223 conditions, 5832 events. 3510/5832 cut-off events. For 164710/164714 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40297 event pairs, 628 based on Foata normal form. 6/5822 useless extension candidates. Maximal degree in co-relation 32112. Up to 4673 conditions per place. [2024-05-12 10:42:07,093 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 220 selfloop transitions, 118 changer transitions 0/351 dead transitions. [2024-05-12 10:42:07,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 351 transitions, 5079 flow [2024-05-12 10:42:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-05-12 10:42:07,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2024-05-12 10:42:07,094 INFO L175 Difference]: Start difference. First operand has 233 places, 297 transitions, 3683 flow. Second operand 9 states and 263 transitions. [2024-05-12 10:42:07,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 351 transitions, 5079 flow [2024-05-12 10:42:07,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 351 transitions, 4987 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:07,522 INFO L231 Difference]: Finished difference. Result has 239 places, 304 transitions, 3921 flow [2024-05-12 10:42:07,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3591, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3921, PETRI_PLACES=239, PETRI_TRANSITIONS=304} [2024-05-12 10:42:07,523 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 188 predicate places. [2024-05-12 10:42:07,523 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 304 transitions, 3921 flow [2024-05-12 10:42:07,523 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) [2024-05-12 10:42:07,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:07,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:07,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 10:42:07,523 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:07,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:07,524 INFO L85 PathProgramCache]: Analyzing trace with hash -704096896, now seen corresponding path program 6 times [2024-05-12 10:42:07,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:07,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300758257] [2024-05-12 10:42:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:07,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:07,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:07,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300758257] [2024-05-12 10:42:07,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300758257] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:07,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:07,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782703657] [2024-05-12 10:42:07,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:07,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:07,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:07,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:07,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 304 transitions, 3921 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) [2024-05-12 10:42:07,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:07,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:07,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:08,728 INFO L124 PetriNetUnfolderBase]: 3504/5824 cut-off events. [2024-05-12 10:42:08,728 INFO L125 PetriNetUnfolderBase]: For 168366/168370 co-relation queries the response was YES. [2024-05-12 10:42:08,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32550 conditions, 5824 events. 3504/5824 cut-off events. For 168366/168370 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40157 event pairs, 628 based on Foata normal form. 6/5814 useless extension candidates. Maximal degree in co-relation 32438. Up to 4668 conditions per place. [2024-05-12 10:42:08,796 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 216 selfloop transitions, 115 changer transitions 0/344 dead transitions. [2024-05-12 10:42:08,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 344 transitions, 5109 flow [2024-05-12 10:42:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-05-12 10:42:08,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504559270516718 [2024-05-12 10:42:08,797 INFO L175 Difference]: Start difference. First operand has 239 places, 304 transitions, 3921 flow. Second operand 7 states and 214 transitions. [2024-05-12 10:42:08,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 344 transitions, 5109 flow [2024-05-12 10:42:09,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 344 transitions, 4876 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:09,399 INFO L231 Difference]: Finished difference. Result has 241 places, 304 transitions, 3943 flow [2024-05-12 10:42:09,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3943, PETRI_PLACES=241, PETRI_TRANSITIONS=304} [2024-05-12 10:42:09,400 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 190 predicate places. [2024-05-12 10:42:09,400 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 304 transitions, 3943 flow [2024-05-12 10:42:09,400 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) [2024-05-12 10:42:09,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:09,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:09,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 10:42:09,401 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:09,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash 670630458, now seen corresponding path program 1 times [2024-05-12 10:42:09,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:09,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011405586] [2024-05-12 10:42:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:09,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:09,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011405586] [2024-05-12 10:42:09,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011405586] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:09,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:09,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:09,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530608580] [2024-05-12 10:42:09,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:09,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:09,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:09,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:09,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:09,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:09,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 304 transitions, 3943 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) [2024-05-12 10:42:09,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:09,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:09,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:10,381 INFO L124 PetriNetUnfolderBase]: 3543/5894 cut-off events. [2024-05-12 10:42:10,381 INFO L125 PetriNetUnfolderBase]: For 173116/173120 co-relation queries the response was YES. [2024-05-12 10:42:10,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33084 conditions, 5894 events. 3543/5894 cut-off events. For 173116/173120 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40630 event pairs, 629 based on Foata normal form. 1/5873 useless extension candidates. Maximal degree in co-relation 32972. Up to 4987 conditions per place. [2024-05-12 10:42:10,443 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 261 selfloop transitions, 68 changer transitions 0/342 dead transitions. [2024-05-12 10:42:10,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 342 transitions, 5035 flow [2024-05-12 10:42:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 10:42:10,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-05-12 10:42:10,445 INFO L175 Difference]: Start difference. First operand has 241 places, 304 transitions, 3943 flow. Second operand 6 states and 178 transitions. [2024-05-12 10:42:10,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 342 transitions, 5035 flow [2024-05-12 10:42:10,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 342 transitions, 4783 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 10:42:10,935 INFO L231 Difference]: Finished difference. Result has 239 places, 313 transitions, 3991 flow [2024-05-12 10:42:10,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3699, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3991, PETRI_PLACES=239, PETRI_TRANSITIONS=313} [2024-05-12 10:42:10,936 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 188 predicate places. [2024-05-12 10:42:10,936 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 313 transitions, 3991 flow [2024-05-12 10:42:10,936 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) [2024-05-12 10:42:10,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:10,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:10,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 10:42:10,936 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:10,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:10,937 INFO L85 PathProgramCache]: Analyzing trace with hash -647840818, now seen corresponding path program 2 times [2024-05-12 10:42:10,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:10,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303714741] [2024-05-12 10:42:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:10,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:11,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:11,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303714741] [2024-05-12 10:42:11,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303714741] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:11,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:11,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:11,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449622200] [2024-05-12 10:42:11,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:11,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:11,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:11,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:11,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:11,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 313 transitions, 3991 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) [2024-05-12 10:42:11,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:11,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:11,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:11,952 INFO L124 PetriNetUnfolderBase]: 3554/5899 cut-off events. [2024-05-12 10:42:11,952 INFO L125 PetriNetUnfolderBase]: For 167759/167763 co-relation queries the response was YES. [2024-05-12 10:42:11,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32786 conditions, 5899 events. 3554/5899 cut-off events. For 167759/167763 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40711 event pairs, 632 based on Foata normal form. 5/5884 useless extension candidates. Maximal degree in co-relation 32675. Up to 4999 conditions per place. [2024-05-12 10:42:12,019 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 262 selfloop transitions, 67 changer transitions 0/342 dead transitions. [2024-05-12 10:42:12,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 342 transitions, 4977 flow [2024-05-12 10:42:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-05-12 10:42:12,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134751773049646 [2024-05-12 10:42:12,020 INFO L175 Difference]: Start difference. First operand has 239 places, 313 transitions, 3991 flow. Second operand 6 states and 173 transitions. [2024-05-12 10:42:12,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 342 transitions, 4977 flow [2024-05-12 10:42:12,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 342 transitions, 4807 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:12,565 INFO L231 Difference]: Finished difference. Result has 242 places, 316 transitions, 4017 flow [2024-05-12 10:42:12,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3827, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4017, PETRI_PLACES=242, PETRI_TRANSITIONS=316} [2024-05-12 10:42:12,565 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 191 predicate places. [2024-05-12 10:42:12,565 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 316 transitions, 4017 flow [2024-05-12 10:42:12,565 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) [2024-05-12 10:42:12,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:12,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:12,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 10:42:12,566 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:12,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash 288310024, now seen corresponding path program 3 times [2024-05-12 10:42:12,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:12,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558481854] [2024-05-12 10:42:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:12,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:12,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:12,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558481854] [2024-05-12 10:42:12,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558481854] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:12,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:12,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:12,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574331231] [2024-05-12 10:42:12,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:12,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:12,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:12,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:12,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:12,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:12,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 316 transitions, 4017 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) [2024-05-12 10:42:12,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:12,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:12,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:13,626 INFO L124 PetriNetUnfolderBase]: 3565/5924 cut-off events. [2024-05-12 10:42:13,626 INFO L125 PetriNetUnfolderBase]: For 172036/172040 co-relation queries the response was YES. [2024-05-12 10:42:13,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32989 conditions, 5924 events. 3565/5924 cut-off events. For 172036/172040 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 40882 event pairs, 595 based on Foata normal form. 5/5914 useless extension candidates. Maximal degree in co-relation 32878. Up to 5166 conditions per place. [2024-05-12 10:42:13,693 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 295 selfloop transitions, 35 changer transitions 0/343 dead transitions. [2024-05-12 10:42:13,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 343 transitions, 4789 flow [2024-05-12 10:42:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-05-12 10:42:13,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-05-12 10:42:13,694 INFO L175 Difference]: Start difference. First operand has 242 places, 316 transitions, 4017 flow. Second operand 6 states and 171 transitions. [2024-05-12 10:42:13,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 343 transitions, 4789 flow [2024-05-12 10:42:14,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 343 transitions, 4589 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:14,220 INFO L231 Difference]: Finished difference. Result has 244 places, 319 transitions, 3955 flow [2024-05-12 10:42:14,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3955, PETRI_PLACES=244, PETRI_TRANSITIONS=319} [2024-05-12 10:42:14,221 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 193 predicate places. [2024-05-12 10:42:14,221 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 319 transitions, 3955 flow [2024-05-12 10:42:14,221 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) [2024-05-12 10:42:14,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:14,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:14,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 10:42:14,222 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:14,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash -633082074, now seen corresponding path program 4 times [2024-05-12 10:42:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:14,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530994173] [2024-05-12 10:42:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:14,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:14,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530994173] [2024-05-12 10:42:14,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530994173] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:14,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:14,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:14,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703721933] [2024-05-12 10:42:14,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:14,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:14,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:14,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:14,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:14,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:14,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 319 transitions, 3955 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) [2024-05-12 10:42:14,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:14,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:14,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:15,223 INFO L124 PetriNetUnfolderBase]: 3562/5914 cut-off events. [2024-05-12 10:42:15,223 INFO L125 PetriNetUnfolderBase]: For 174311/174315 co-relation queries the response was YES. [2024-05-12 10:42:15,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32714 conditions, 5914 events. 3562/5914 cut-off events. For 174311/174315 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 40855 event pairs, 632 based on Foata normal form. 5/5899 useless extension candidates. Maximal degree in co-relation 32602. Up to 5008 conditions per place. [2024-05-12 10:42:15,289 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 259 selfloop transitions, 69 changer transitions 0/341 dead transitions. [2024-05-12 10:42:15,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 341 transitions, 4771 flow [2024-05-12 10:42:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-05-12 10:42:15,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.599290780141844 [2024-05-12 10:42:15,290 INFO L175 Difference]: Start difference. First operand has 244 places, 319 transitions, 3955 flow. Second operand 6 states and 169 transitions. [2024-05-12 10:42:15,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 341 transitions, 4771 flow [2024-05-12 10:42:15,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 341 transitions, 4671 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:15,817 INFO L231 Difference]: Finished difference. Result has 245 places, 319 transitions, 3999 flow [2024-05-12 10:42:15,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3855, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3999, PETRI_PLACES=245, PETRI_TRANSITIONS=319} [2024-05-12 10:42:15,817 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 194 predicate places. [2024-05-12 10:42:15,818 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 319 transitions, 3999 flow [2024-05-12 10:42:15,818 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) [2024-05-12 10:42:15,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:15,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:15,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 10:42:15,818 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:15,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash -677433794, now seen corresponding path program 5 times [2024-05-12 10:42:15,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:15,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203999297] [2024-05-12 10:42:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:15,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:16,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:16,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203999297] [2024-05-12 10:42:16,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203999297] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:16,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:16,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:16,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766934295] [2024-05-12 10:42:16,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:16,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:16,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:16,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:16,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:16,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 319 transitions, 3999 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) [2024-05-12 10:42:16,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:16,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:16,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:16,850 INFO L124 PetriNetUnfolderBase]: 3556/5904 cut-off events. [2024-05-12 10:42:16,850 INFO L125 PetriNetUnfolderBase]: For 176604/176608 co-relation queries the response was YES. [2024-05-12 10:42:16,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32747 conditions, 5904 events. 3556/5904 cut-off events. For 176604/176608 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 40739 event pairs, 602 based on Foata normal form. 6/5902 useless extension candidates. Maximal degree in co-relation 32635. Up to 5037 conditions per place. [2024-05-12 10:42:16,913 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 276 selfloop transitions, 67 changer transitions 0/356 dead transitions. [2024-05-12 10:42:16,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 356 transitions, 4885 flow [2024-05-12 10:42:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-05-12 10:42:16,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291793313069909 [2024-05-12 10:42:16,914 INFO L175 Difference]: Start difference. First operand has 245 places, 319 transitions, 3999 flow. Second operand 7 states and 207 transitions. [2024-05-12 10:42:16,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 356 transitions, 4885 flow [2024-05-12 10:42:17,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 356 transitions, 4676 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:17,628 INFO L231 Difference]: Finished difference. Result has 247 places, 319 transitions, 3941 flow [2024-05-12 10:42:17,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3941, PETRI_PLACES=247, PETRI_TRANSITIONS=319} [2024-05-12 10:42:17,629 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-05-12 10:42:17,629 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 319 transitions, 3941 flow [2024-05-12 10:42:17,629 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) [2024-05-12 10:42:17,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:17,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:17,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 10:42:17,629 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:17,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:17,629 INFO L85 PathProgramCache]: Analyzing trace with hash -686819168, now seen corresponding path program 2 times [2024-05-12 10:42:17,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:17,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973454875] [2024-05-12 10:42:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:17,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:17,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973454875] [2024-05-12 10:42:17,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973454875] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:17,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:17,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104574846] [2024-05-12 10:42:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:17,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:17,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:17,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 319 transitions, 3941 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:17,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:17,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:17,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:18,656 INFO L124 PetriNetUnfolderBase]: 3567/5906 cut-off events. [2024-05-12 10:42:18,656 INFO L125 PetriNetUnfolderBase]: For 179416/179416 co-relation queries the response was YES. [2024-05-12 10:42:18,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32824 conditions, 5906 events. 3567/5906 cut-off events. For 179416/179416 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 40671 event pairs, 628 based on Foata normal form. 1/5886 useless extension candidates. Maximal degree in co-relation 32712. Up to 5047 conditions per place. [2024-05-12 10:42:18,719 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 271 selfloop transitions, 64 changer transitions 0/348 dead transitions. [2024-05-12 10:42:18,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 348 transitions, 4961 flow [2024-05-12 10:42:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:18,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:42:18,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:42:18,720 INFO L175 Difference]: Start difference. First operand has 247 places, 319 transitions, 3941 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:42:18,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 348 transitions, 4961 flow [2024-05-12 10:42:19,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 348 transitions, 4780 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 10:42:19,322 INFO L231 Difference]: Finished difference. Result has 246 places, 322 transitions, 3966 flow [2024-05-12 10:42:19,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3966, PETRI_PLACES=246, PETRI_TRANSITIONS=322} [2024-05-12 10:42:19,322 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 195 predicate places. [2024-05-12 10:42:19,322 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 322 transitions, 3966 flow [2024-05-12 10:42:19,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:19,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:19,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:19,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 10:42:19,323 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:19,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1249843720, now seen corresponding path program 6 times [2024-05-12 10:42:19,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:19,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787316458] [2024-05-12 10:42:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:19,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:19,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:19,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787316458] [2024-05-12 10:42:19,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787316458] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:19,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:19,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:19,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159849664] [2024-05-12 10:42:19,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:19,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:42:19,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:42:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:42:19,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:19,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 322 transitions, 3966 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) [2024-05-12 10:42:19,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:19,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:19,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:20,355 INFO L124 PetriNetUnfolderBase]: 3561/5917 cut-off events. [2024-05-12 10:42:20,356 INFO L125 PetriNetUnfolderBase]: For 174392/174396 co-relation queries the response was YES. [2024-05-12 10:42:20,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32521 conditions, 5917 events. 3561/5917 cut-off events. For 174392/174396 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 40978 event pairs, 631 based on Foata normal form. 6/5903 useless extension candidates. Maximal degree in co-relation 32409. Up to 5046 conditions per place. [2024-05-12 10:42:20,421 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 271 selfloop transitions, 59 changer transitions 0/343 dead transitions. [2024-05-12 10:42:20,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 343 transitions, 4676 flow [2024-05-12 10:42:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:42:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:42:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-05-12 10:42:20,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6297872340425532 [2024-05-12 10:42:20,422 INFO L175 Difference]: Start difference. First operand has 246 places, 322 transitions, 3966 flow. Second operand 5 states and 148 transitions. [2024-05-12 10:42:20,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 343 transitions, 4676 flow [2024-05-12 10:42:21,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 343 transitions, 4533 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:21,188 INFO L231 Difference]: Finished difference. Result has 247 places, 322 transitions, 3955 flow [2024-05-12 10:42:21,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3955, PETRI_PLACES=247, PETRI_TRANSITIONS=322} [2024-05-12 10:42:21,189 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-05-12 10:42:21,189 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 322 transitions, 3955 flow [2024-05-12 10:42:21,189 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) [2024-05-12 10:42:21,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:21,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:21,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 10:42:21,189 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:21,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:21,190 INFO L85 PathProgramCache]: Analyzing trace with hash 68680224, now seen corresponding path program 3 times [2024-05-12 10:42:21,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:21,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968715345] [2024-05-12 10:42:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:21,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:21,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:21,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968715345] [2024-05-12 10:42:21,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968715345] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:21,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:21,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216722449] [2024-05-12 10:42:21,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:21,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:21,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:21,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 322 transitions, 3955 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:21,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:21,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:21,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:22,267 INFO L124 PetriNetUnfolderBase]: 3558/6028 cut-off events. [2024-05-12 10:42:22,268 INFO L125 PetriNetUnfolderBase]: For 178108/178112 co-relation queries the response was YES. [2024-05-12 10:42:22,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32566 conditions, 6028 events. 3558/6028 cut-off events. For 178108/178112 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42244 event pairs, 751 based on Foata normal form. 5/6015 useless extension candidates. Maximal degree in co-relation 32452. Up to 5036 conditions per place. [2024-05-12 10:42:22,335 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 269 selfloop transitions, 65 changer transitions 0/347 dead transitions. [2024-05-12 10:42:22,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 347 transitions, 4795 flow [2024-05-12 10:42:22,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 10:42:22,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-05-12 10:42:22,336 INFO L175 Difference]: Start difference. First operand has 247 places, 322 transitions, 3955 flow. Second operand 6 states and 174 transitions. [2024-05-12 10:42:22,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 347 transitions, 4795 flow [2024-05-12 10:42:22,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 347 transitions, 4655 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:22,825 INFO L231 Difference]: Finished difference. Result has 248 places, 322 transitions, 3957 flow [2024-05-12 10:42:22,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3817, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3957, PETRI_PLACES=248, PETRI_TRANSITIONS=322} [2024-05-12 10:42:22,825 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 197 predicate places. [2024-05-12 10:42:22,826 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 322 transitions, 3957 flow [2024-05-12 10:42:22,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:22,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:22,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:22,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 10:42:22,826 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:22,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:22,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1444585660, now seen corresponding path program 4 times [2024-05-12 10:42:22,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:22,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642378497] [2024-05-12 10:42:22,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:22,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:23,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:23,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642378497] [2024-05-12 10:42:23,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642378497] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:23,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:23,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:23,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53122997] [2024-05-12 10:42:23,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:23,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:23,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:23,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:23,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:23,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 322 transitions, 3957 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:23,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:23,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:23,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:23,911 INFO L124 PetriNetUnfolderBase]: 3555/6027 cut-off events. [2024-05-12 10:42:23,911 INFO L125 PetriNetUnfolderBase]: For 176106/176106 co-relation queries the response was YES. [2024-05-12 10:42:23,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32482 conditions, 6027 events. 3555/6027 cut-off events. For 176106/176106 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42296 event pairs, 718 based on Foata normal form. 1/6007 useless extension candidates. Maximal degree in co-relation 32368. Up to 5033 conditions per place. [2024-05-12 10:42:23,968 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 265 selfloop transitions, 65 changer transitions 0/343 dead transitions. [2024-05-12 10:42:23,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 343 transitions, 4665 flow [2024-05-12 10:42:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 10:42:23,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028368794326241 [2024-05-12 10:42:23,969 INFO L175 Difference]: Start difference. First operand has 248 places, 322 transitions, 3957 flow. Second operand 6 states and 170 transitions. [2024-05-12 10:42:23,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 343 transitions, 4665 flow [2024-05-12 10:42:24,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 343 transitions, 4449 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-05-12 10:42:24,522 INFO L231 Difference]: Finished difference. Result has 247 places, 322 transitions, 3881 flow [2024-05-12 10:42:24,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3881, PETRI_PLACES=247, PETRI_TRANSITIONS=322} [2024-05-12 10:42:24,523 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-05-12 10:42:24,523 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 322 transitions, 3881 flow [2024-05-12 10:42:24,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:24,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:24,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:24,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 10:42:24,523 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:24,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash -703697058, now seen corresponding path program 2 times [2024-05-12 10:42:24,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:24,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52464152] [2024-05-12 10:42:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:24,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:24,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:24,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52464152] [2024-05-12 10:42:24,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52464152] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:24,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:24,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:24,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067919856] [2024-05-12 10:42:24,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:24,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:24,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:24,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:24,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:24,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:24,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 322 transitions, 3881 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:24,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:24,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:24,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:25,594 INFO L124 PetriNetUnfolderBase]: 3591/5965 cut-off events. [2024-05-12 10:42:25,594 INFO L125 PetriNetUnfolderBase]: For 178983/178987 co-relation queries the response was YES. [2024-05-12 10:42:25,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32570 conditions, 5965 events. 3591/5965 cut-off events. For 178983/178987 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 41281 event pairs, 628 based on Foata normal form. 8/5955 useless extension candidates. Maximal degree in co-relation 32457. Up to 5029 conditions per place. [2024-05-12 10:42:25,656 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 266 selfloop transitions, 71 changer transitions 0/350 dead transitions. [2024-05-12 10:42:25,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 350 transitions, 4673 flow [2024-05-12 10:42:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 10:42:25,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-05-12 10:42:25,657 INFO L175 Difference]: Start difference. First operand has 247 places, 322 transitions, 3881 flow. Second operand 6 states and 174 transitions. [2024-05-12 10:42:25,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 350 transitions, 4673 flow [2024-05-12 10:42:26,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 350 transitions, 4465 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 10:42:26,120 INFO L231 Difference]: Finished difference. Result has 246 places, 325 transitions, 3891 flow [2024-05-12 10:42:26,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3673, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3891, PETRI_PLACES=246, PETRI_TRANSITIONS=325} [2024-05-12 10:42:26,120 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 195 predicate places. [2024-05-12 10:42:26,120 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 325 transitions, 3891 flow [2024-05-12 10:42:26,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:26,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:26,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:26,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 10:42:26,121 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:26,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:26,121 INFO L85 PathProgramCache]: Analyzing trace with hash 496785822, now seen corresponding path program 3 times [2024-05-12 10:42:26,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:26,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220154930] [2024-05-12 10:42:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:26,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:26,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220154930] [2024-05-12 10:42:26,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220154930] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:26,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:26,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:26,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554113115] [2024-05-12 10:42:26,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:26,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:26,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:26,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:26,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:26,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:26,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 325 transitions, 3891 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:26,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:26,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:26,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:27,238 INFO L124 PetriNetUnfolderBase]: 3627/6123 cut-off events. [2024-05-12 10:42:27,239 INFO L125 PetriNetUnfolderBase]: For 180585/180585 co-relation queries the response was YES. [2024-05-12 10:42:27,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33293 conditions, 6123 events. 3627/6123 cut-off events. For 180585/180585 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 42910 event pairs, 695 based on Foata normal form. 4/6113 useless extension candidates. Maximal degree in co-relation 33180. Up to 5201 conditions per place. [2024-05-12 10:42:27,303 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 297 selfloop transitions, 46 changer transitions 0/356 dead transitions. [2024-05-12 10:42:27,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 356 transitions, 4709 flow [2024-05-12 10:42:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:42:27,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-05-12 10:42:27,304 INFO L175 Difference]: Start difference. First operand has 246 places, 325 transitions, 3891 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:42:27,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 356 transitions, 4709 flow [2024-05-12 10:42:27,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 356 transitions, 4482 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:27,962 INFO L231 Difference]: Finished difference. Result has 247 places, 328 transitions, 3834 flow [2024-05-12 10:42:27,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3834, PETRI_PLACES=247, PETRI_TRANSITIONS=328} [2024-05-12 10:42:27,963 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-05-12 10:42:27,963 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 328 transitions, 3834 flow [2024-05-12 10:42:27,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:27,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:27,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:27,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 10:42:27,964 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:27,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:27,964 INFO L85 PathProgramCache]: Analyzing trace with hash 512022942, now seen corresponding path program 4 times [2024-05-12 10:42:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:27,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259465279] [2024-05-12 10:42:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:28,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:28,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259465279] [2024-05-12 10:42:28,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259465279] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:28,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:28,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433548590] [2024-05-12 10:42:28,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:28,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:28,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 328 transitions, 3834 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:28,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:28,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:28,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:29,034 INFO L124 PetriNetUnfolderBase]: 3689/6105 cut-off events. [2024-05-12 10:42:29,035 INFO L125 PetriNetUnfolderBase]: For 180893/180893 co-relation queries the response was YES. [2024-05-12 10:42:29,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33586 conditions, 6105 events. 3689/6105 cut-off events. For 180893/180893 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 42195 event pairs, 606 based on Foata normal form. 4/6091 useless extension candidates. Maximal degree in co-relation 33472. Up to 5180 conditions per place. [2024-05-12 10:42:29,100 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 304 selfloop transitions, 44 changer transitions 0/361 dead transitions. [2024-05-12 10:42:29,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 361 transitions, 4832 flow [2024-05-12 10:42:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 10:42:29,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205673758865248 [2024-05-12 10:42:29,101 INFO L175 Difference]: Start difference. First operand has 247 places, 328 transitions, 3834 flow. Second operand 6 states and 175 transitions. [2024-05-12 10:42:29,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 361 transitions, 4832 flow [2024-05-12 10:42:29,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 361 transitions, 4690 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:29,864 INFO L231 Difference]: Finished difference. Result has 250 places, 334 transitions, 3931 flow [2024-05-12 10:42:29,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3692, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3931, PETRI_PLACES=250, PETRI_TRANSITIONS=334} [2024-05-12 10:42:29,864 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 199 predicate places. [2024-05-12 10:42:29,864 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 334 transitions, 3931 flow [2024-05-12 10:42:29,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:29,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:29,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:29,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 10:42:29,865 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:29,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:29,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1134444360, now seen corresponding path program 1 times [2024-05-12 10:42:29,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:29,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324407566] [2024-05-12 10:42:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:29,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:30,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:30,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324407566] [2024-05-12 10:42:30,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324407566] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:30,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:30,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:30,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936648842] [2024-05-12 10:42:30,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:30,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:30,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:30,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:30,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:30,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 334 transitions, 3931 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:30,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:30,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:30,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:31,013 INFO L124 PetriNetUnfolderBase]: 3748/6205 cut-off events. [2024-05-12 10:42:31,013 INFO L125 PetriNetUnfolderBase]: For 194331/194331 co-relation queries the response was YES. [2024-05-12 10:42:31,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34482 conditions, 6205 events. 3748/6205 cut-off events. For 194331/194331 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 43182 event pairs, 568 based on Foata normal form. 4/6188 useless extension candidates. Maximal degree in co-relation 34366. Up to 5140 conditions per place. [2024-05-12 10:42:31,084 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 277 selfloop transitions, 83 changer transitions 0/373 dead transitions. [2024-05-12 10:42:31,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 373 transitions, 4955 flow [2024-05-12 10:42:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:42:31,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-05-12 10:42:31,085 INFO L175 Difference]: Start difference. First operand has 250 places, 334 transitions, 3931 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:42:31,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 373 transitions, 4955 flow [2024-05-12 10:42:31,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 373 transitions, 4828 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:31,546 INFO L231 Difference]: Finished difference. Result has 255 places, 340 transitions, 4094 flow [2024-05-12 10:42:31,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3804, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4094, PETRI_PLACES=255, PETRI_TRANSITIONS=340} [2024-05-12 10:42:31,546 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 204 predicate places. [2024-05-12 10:42:31,546 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 340 transitions, 4094 flow [2024-05-12 10:42:31,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:31,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:31,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:31,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 10:42:31,547 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:31,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1134562470, now seen corresponding path program 2 times [2024-05-12 10:42:31,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:31,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201433696] [2024-05-12 10:42:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:31,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:31,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:31,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201433696] [2024-05-12 10:42:31,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201433696] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:31,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:31,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:31,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899337091] [2024-05-12 10:42:31,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:31,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:31,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:31,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 340 transitions, 4094 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:31,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:31,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:31,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:32,675 INFO L124 PetriNetUnfolderBase]: 3784/6257 cut-off events. [2024-05-12 10:42:32,676 INFO L125 PetriNetUnfolderBase]: For 199128/199128 co-relation queries the response was YES. [2024-05-12 10:42:32,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35088 conditions, 6257 events. 3784/6257 cut-off events. For 199128/199128 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 43515 event pairs, 655 based on Foata normal form. 4/6240 useless extension candidates. Maximal degree in co-relation 34970. Up to 5306 conditions per place. [2024-05-12 10:42:32,747 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 280 selfloop transitions, 78 changer transitions 0/371 dead transitions. [2024-05-12 10:42:32,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 371 transitions, 4936 flow [2024-05-12 10:42:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-05-12 10:42:32,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601823708206687 [2024-05-12 10:42:32,749 INFO L175 Difference]: Start difference. First operand has 255 places, 340 transitions, 4094 flow. Second operand 7 states and 198 transitions. [2024-05-12 10:42:32,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 371 transitions, 4936 flow [2024-05-12 10:42:33,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 371 transitions, 4744 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:33,423 INFO L231 Difference]: Finished difference. Result has 259 places, 343 transitions, 4132 flow [2024-05-12 10:42:33,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4132, PETRI_PLACES=259, PETRI_TRANSITIONS=343} [2024-05-12 10:42:33,424 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 208 predicate places. [2024-05-12 10:42:33,424 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 343 transitions, 4132 flow [2024-05-12 10:42:33,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:33,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:33,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:33,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 10:42:33,425 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:33,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1249853640, now seen corresponding path program 3 times [2024-05-12 10:42:33,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:33,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959588913] [2024-05-12 10:42:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:33,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:33,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:33,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959588913] [2024-05-12 10:42:33,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959588913] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:33,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:33,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:33,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608427359] [2024-05-12 10:42:33,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:33,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:33,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:33,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:33,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:33,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:33,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 343 transitions, 4132 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:33,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:33,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:33,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:34,553 INFO L124 PetriNetUnfolderBase]: 3820/6420 cut-off events. [2024-05-12 10:42:34,553 INFO L125 PetriNetUnfolderBase]: For 204863/204863 co-relation queries the response was YES. [2024-05-12 10:42:34,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35445 conditions, 6420 events. 3820/6420 cut-off events. For 204863/204863 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 45152 event pairs, 725 based on Foata normal form. 4/6406 useless extension candidates. Maximal degree in co-relation 35325. Up to 5501 conditions per place. [2024-05-12 10:42:34,627 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 319 selfloop transitions, 39 changer transitions 0/371 dead transitions. [2024-05-12 10:42:34,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 371 transitions, 4946 flow [2024-05-12 10:42:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 10:42:34,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866261398176292 [2024-05-12 10:42:34,628 INFO L175 Difference]: Start difference. First operand has 259 places, 343 transitions, 4132 flow. Second operand 7 states and 193 transitions. [2024-05-12 10:42:34,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 371 transitions, 4946 flow [2024-05-12 10:42:35,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 371 transitions, 4770 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:35,067 INFO L231 Difference]: Finished difference. Result has 261 places, 346 transitions, 4088 flow [2024-05-12 10:42:35,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3956, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4088, PETRI_PLACES=261, PETRI_TRANSITIONS=346} [2024-05-12 10:42:35,067 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-05-12 10:42:35,067 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 346 transitions, 4088 flow [2024-05-12 10:42:35,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:35,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:35,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:35,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 10:42:35,068 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:35,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2022541452, now seen corresponding path program 1 times [2024-05-12 10:42:35,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:35,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412926178] [2024-05-12 10:42:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:35,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:35,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:35,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412926178] [2024-05-12 10:42:35,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412926178] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:35,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:35,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:35,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709826313] [2024-05-12 10:42:35,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:35,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:35,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:35,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:35,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:35,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:35,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 346 transitions, 4088 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:35,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:35,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:35,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:36,282 INFO L124 PetriNetUnfolderBase]: 3856/6351 cut-off events. [2024-05-12 10:42:36,282 INFO L125 PetriNetUnfolderBase]: For 209629/209629 co-relation queries the response was YES. [2024-05-12 10:42:36,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35637 conditions, 6351 events. 3856/6351 cut-off events. For 209629/209629 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 44087 event pairs, 646 based on Foata normal form. 4/6334 useless extension candidates. Maximal degree in co-relation 35516. Up to 5440 conditions per place. [2024-05-12 10:42:36,342 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 294 selfloop transitions, 67 changer transitions 0/374 dead transitions. [2024-05-12 10:42:36,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 374 transitions, 4936 flow [2024-05-12 10:42:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:42:36,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5927051671732523 [2024-05-12 10:42:36,343 INFO L175 Difference]: Start difference. First operand has 261 places, 346 transitions, 4088 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:42:36,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 374 transitions, 4936 flow [2024-05-12 10:42:36,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 374 transitions, 4848 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:36,821 INFO L231 Difference]: Finished difference. Result has 264 places, 349 transitions, 4216 flow [2024-05-12 10:42:36,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4216, PETRI_PLACES=264, PETRI_TRANSITIONS=349} [2024-05-12 10:42:36,822 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 213 predicate places. [2024-05-12 10:42:36,822 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 349 transitions, 4216 flow [2024-05-12 10:42:36,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:36,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:36,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:36,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 10:42:36,823 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:36,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:36,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1487430266, now seen corresponding path program 4 times [2024-05-12 10:42:36,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:36,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245874825] [2024-05-12 10:42:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:37,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:37,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245874825] [2024-05-12 10:42:37,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245874825] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:37,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:37,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:37,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913722346] [2024-05-12 10:42:37,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:37,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:37,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:37,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:37,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 349 transitions, 4216 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:37,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:37,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:37,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:37,987 INFO L124 PetriNetUnfolderBase]: 3846/6526 cut-off events. [2024-05-12 10:42:37,988 INFO L125 PetriNetUnfolderBase]: For 211704/211704 co-relation queries the response was YES. [2024-05-12 10:42:38,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35820 conditions, 6526 events. 3846/6526 cut-off events. For 211704/211704 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 46267 event pairs, 618 based on Foata normal form. 4/6516 useless extension candidates. Maximal degree in co-relation 35698. Up to 5347 conditions per place. [2024-05-12 10:42:38,062 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 294 selfloop transitions, 76 changer transitions 0/383 dead transitions. [2024-05-12 10:42:38,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 383 transitions, 5036 flow [2024-05-12 10:42:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:42:38,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6200607902735562 [2024-05-12 10:42:38,062 INFO L175 Difference]: Start difference. First operand has 264 places, 349 transitions, 4216 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:42:38,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 383 transitions, 5036 flow [2024-05-12 10:42:38,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 383 transitions, 4822 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:38,662 INFO L231 Difference]: Finished difference. Result has 266 places, 349 transitions, 4169 flow [2024-05-12 10:42:38,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4169, PETRI_PLACES=266, PETRI_TRANSITIONS=349} [2024-05-12 10:42:38,663 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 215 predicate places. [2024-05-12 10:42:38,663 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 349 transitions, 4169 flow [2024-05-12 10:42:38,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:38,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:38,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:38,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 10:42:38,664 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:38,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash 275557856, now seen corresponding path program 2 times [2024-05-12 10:42:38,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:38,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024520084] [2024-05-12 10:42:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:38,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:38,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:38,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024520084] [2024-05-12 10:42:38,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024520084] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:38,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:38,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:38,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216633379] [2024-05-12 10:42:38,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:38,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:38,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:38,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:38,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 349 transitions, 4169 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:38,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:38,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:38,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:39,807 INFO L124 PetriNetUnfolderBase]: 3859/6356 cut-off events. [2024-05-12 10:42:39,807 INFO L125 PetriNetUnfolderBase]: For 210162/210162 co-relation queries the response was YES. [2024-05-12 10:42:39,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35567 conditions, 6356 events. 3859/6356 cut-off events. For 210162/210162 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44236 event pairs, 643 based on Foata normal form. 4/6339 useless extension candidates. Maximal degree in co-relation 35444. Up to 5417 conditions per place. [2024-05-12 10:42:39,879 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 290 selfloop transitions, 71 changer transitions 0/374 dead transitions. [2024-05-12 10:42:39,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 374 transitions, 5017 flow [2024-05-12 10:42:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:39,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-05-12 10:42:39,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-05-12 10:42:39,880 INFO L175 Difference]: Start difference. First operand has 266 places, 349 transitions, 4169 flow. Second operand 6 states and 171 transitions. [2024-05-12 10:42:39,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 374 transitions, 5017 flow [2024-05-12 10:42:40,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 374 transitions, 4853 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:40,584 INFO L231 Difference]: Finished difference. Result has 266 places, 352 transitions, 4239 flow [2024-05-12 10:42:40,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4239, PETRI_PLACES=266, PETRI_TRANSITIONS=352} [2024-05-12 10:42:40,584 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 215 predicate places. [2024-05-12 10:42:40,584 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 352 transitions, 4239 flow [2024-05-12 10:42:40,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:40,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:40,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:40,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 10:42:40,585 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:40,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:40,585 INFO L85 PathProgramCache]: Analyzing trace with hash 503459006, now seen corresponding path program 3 times [2024-05-12 10:42:40,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:40,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383844695] [2024-05-12 10:42:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:40,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:40,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:40,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383844695] [2024-05-12 10:42:40,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383844695] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:40,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:40,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:40,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032367799] [2024-05-12 10:42:40,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:40,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:40,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:40,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:40,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:40,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:40,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 352 transitions, 4239 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:40,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:40,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:40,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:41,746 INFO L124 PetriNetUnfolderBase]: 3895/6512 cut-off events. [2024-05-12 10:42:41,746 INFO L125 PetriNetUnfolderBase]: For 212854/212854 co-relation queries the response was YES. [2024-05-12 10:42:41,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36098 conditions, 6512 events. 3895/6512 cut-off events. For 212854/212854 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 45649 event pairs, 749 based on Foata normal form. 4/6501 useless extension candidates. Maximal degree in co-relation 35974. Up to 5589 conditions per place. [2024-05-12 10:42:41,820 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 324 selfloop transitions, 46 changer transitions 0/383 dead transitions. [2024-05-12 10:42:41,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 383 transitions, 5089 flow [2024-05-12 10:42:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:42:41,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-05-12 10:42:41,821 INFO L175 Difference]: Start difference. First operand has 266 places, 352 transitions, 4239 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:42:41,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 383 transitions, 5089 flow [2024-05-12 10:42:42,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 383 transitions, 4883 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:42,351 INFO L231 Difference]: Finished difference. Result has 268 places, 355 transitions, 4181 flow [2024-05-12 10:42:42,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4181, PETRI_PLACES=268, PETRI_TRANSITIONS=355} [2024-05-12 10:42:42,351 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 217 predicate places. [2024-05-12 10:42:42,351 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 355 transitions, 4181 flow [2024-05-12 10:42:42,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:42,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:42,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:42,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 10:42:42,352 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:42,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:42,352 INFO L85 PathProgramCache]: Analyzing trace with hash 512029886, now seen corresponding path program 4 times [2024-05-12 10:42:42,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:42,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084676912] [2024-05-12 10:42:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:42,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:42,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:42,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084676912] [2024-05-12 10:42:42,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084676912] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:42,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:42,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:42,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158652406] [2024-05-12 10:42:42,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:42,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:42,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:42,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:42,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:42,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 355 transitions, 4181 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:42,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:42,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:42,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:43,468 INFO L124 PetriNetUnfolderBase]: 3882/6360 cut-off events. [2024-05-12 10:42:43,468 INFO L125 PetriNetUnfolderBase]: For 198837/198837 co-relation queries the response was YES. [2024-05-12 10:42:43,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35064 conditions, 6360 events. 3882/6360 cut-off events. For 198837/198837 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 43903 event pairs, 582 based on Foata normal form. 4/6356 useless extension candidates. Maximal degree in co-relation 34939. Up to 5440 conditions per place. [2024-05-12 10:42:43,541 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 321 selfloop transitions, 47 changer transitions 0/381 dead transitions. [2024-05-12 10:42:43,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 381 transitions, 4977 flow [2024-05-12 10:42:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 10:42:43,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-05-12 10:42:43,542 INFO L175 Difference]: Start difference. First operand has 268 places, 355 transitions, 4181 flow. Second operand 6 states and 174 transitions. [2024-05-12 10:42:43,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 381 transitions, 4977 flow [2024-05-12 10:42:44,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 381 transitions, 4839 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:44,201 INFO L231 Difference]: Finished difference. Result has 270 places, 355 transitions, 4145 flow [2024-05-12 10:42:44,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4043, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4145, PETRI_PLACES=270, PETRI_TRANSITIONS=355} [2024-05-12 10:42:44,202 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 219 predicate places. [2024-05-12 10:42:44,202 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 355 transitions, 4145 flow [2024-05-12 10:42:44,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:44,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:44,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:44,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 10:42:44,202 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:44,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1012830647, now seen corresponding path program 1 times [2024-05-12 10:42:44,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:44,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148730371] [2024-05-12 10:42:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:44,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:44,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:44,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148730371] [2024-05-12 10:42:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148730371] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:44,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:44,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:42:44,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501577999] [2024-05-12 10:42:44,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:44,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:42:44,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:44,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:42:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:42:44,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2024-05-12 10:42:44,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 355 transitions, 4145 flow. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 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) [2024-05-12 10:42:44,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:44,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2024-05-12 10:42:44,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:44,975 INFO L124 PetriNetUnfolderBase]: 2278/4588 cut-off events. [2024-05-12 10:42:44,975 INFO L125 PetriNetUnfolderBase]: For 120347/129065 co-relation queries the response was YES. [2024-05-12 10:42:45,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21120 conditions, 4588 events. 2278/4588 cut-off events. For 120347/129065 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38819 event pairs, 457 based on Foata normal form. 254/4357 useless extension candidates. Maximal degree in co-relation 20994. Up to 1752 conditions per place. [2024-05-12 10:42:45,029 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 31 selfloop transitions, 63 changer transitions 127/498 dead transitions. [2024-05-12 10:42:45,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 498 transitions, 6337 flow [2024-05-12 10:42:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-05-12 10:42:45,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6717325227963525 [2024-05-12 10:42:45,030 INFO L175 Difference]: Start difference. First operand has 270 places, 355 transitions, 4145 flow. Second operand 7 states and 221 transitions. [2024-05-12 10:42:45,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 498 transitions, 6337 flow [2024-05-12 10:42:45,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 498 transitions, 6156 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:45,506 INFO L231 Difference]: Finished difference. Result has 276 places, 357 transitions, 4237 flow [2024-05-12 10:42:45,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4032, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4237, PETRI_PLACES=276, PETRI_TRANSITIONS=357} [2024-05-12 10:42:45,507 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 225 predicate places. [2024-05-12 10:42:45,507 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 357 transitions, 4237 flow [2024-05-12 10:42:45,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 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) [2024-05-12 10:42:45,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:45,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:45,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 10:42:45,507 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:45,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1103488339, now seen corresponding path program 1 times [2024-05-12 10:42:45,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:45,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867914149] [2024-05-12 10:42:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:45,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:45,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867914149] [2024-05-12 10:42:45,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867914149] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:45,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:45,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:45,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132495978] [2024-05-12 10:42:45,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:45,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:45,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:45,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:45,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:45,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 357 transitions, 4237 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:45,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:45,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:45,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:46,752 INFO L124 PetriNetUnfolderBase]: 3804/6541 cut-off events. [2024-05-12 10:42:46,752 INFO L125 PetriNetUnfolderBase]: For 202770/202899 co-relation queries the response was YES. [2024-05-12 10:42:46,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35922 conditions, 6541 events. 3804/6541 cut-off events. For 202770/202899 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 46767 event pairs, 813 based on Foata normal form. 130/6627 useless extension candidates. Maximal degree in co-relation 35791. Up to 5411 conditions per place. [2024-05-12 10:42:46,829 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 304 selfloop transitions, 73 changer transitions 9/400 dead transitions. [2024-05-12 10:42:46,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 400 transitions, 5345 flow [2024-05-12 10:42:46,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:42:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:42:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-05-12 10:42:46,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680851063829787 [2024-05-12 10:42:46,830 INFO L175 Difference]: Start difference. First operand has 276 places, 357 transitions, 4237 flow. Second operand 10 states and 267 transitions. [2024-05-12 10:42:46,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 400 transitions, 5345 flow [2024-05-12 10:42:47,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 400 transitions, 5278 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:47,392 INFO L231 Difference]: Finished difference. Result has 282 places, 362 transitions, 4427 flow [2024-05-12 10:42:47,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4427, PETRI_PLACES=282, PETRI_TRANSITIONS=362} [2024-05-12 10:42:47,392 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 231 predicate places. [2024-05-12 10:42:47,392 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 362 transitions, 4427 flow [2024-05-12 10:42:47,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:47,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:47,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:47,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 10:42:47,393 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:47,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1465508499, now seen corresponding path program 2 times [2024-05-12 10:42:47,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:47,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266227645] [2024-05-12 10:42:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:47,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:47,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:47,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266227645] [2024-05-12 10:42:47,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266227645] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:47,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:47,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020222314] [2024-05-12 10:42:47,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:47,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:47,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:47,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:47,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:47,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 362 transitions, 4427 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) [2024-05-12 10:42:47,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:47,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:47,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:48,619 INFO L124 PetriNetUnfolderBase]: 3542/6095 cut-off events. [2024-05-12 10:42:48,619 INFO L125 PetriNetUnfolderBase]: For 214423/214554 co-relation queries the response was YES. [2024-05-12 10:42:48,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33671 conditions, 6095 events. 3542/6095 cut-off events. For 214423/214554 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 42647 event pairs, 824 based on Foata normal form. 132/6187 useless extension candidates. Maximal degree in co-relation 33539. Up to 4834 conditions per place. [2024-05-12 10:42:48,680 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 247 selfloop transitions, 137 changer transitions 0/398 dead transitions. [2024-05-12 10:42:48,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 398 transitions, 5713 flow [2024-05-12 10:42:48,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 10:42:48,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5896656534954408 [2024-05-12 10:42:48,684 INFO L175 Difference]: Start difference. First operand has 282 places, 362 transitions, 4427 flow. Second operand 7 states and 194 transitions. [2024-05-12 10:42:48,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 398 transitions, 5713 flow [2024-05-12 10:42:49,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 398 transitions, 5526 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-05-12 10:42:49,512 INFO L231 Difference]: Finished difference. Result has 280 places, 374 transitions, 4722 flow [2024-05-12 10:42:49,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4240, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4722, PETRI_PLACES=280, PETRI_TRANSITIONS=374} [2024-05-12 10:42:49,513 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 229 predicate places. [2024-05-12 10:42:49,513 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 374 transitions, 4722 flow [2024-05-12 10:42:49,513 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) [2024-05-12 10:42:49,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:49,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:49,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 10:42:49,513 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:49,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:49,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1849738929, now seen corresponding path program 3 times [2024-05-12 10:42:49,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:49,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765352213] [2024-05-12 10:42:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:49,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:49,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:49,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765352213] [2024-05-12 10:42:49,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765352213] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:49,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:49,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:49,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712752959] [2024-05-12 10:42:49,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:49,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:49,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:49,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:49,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 374 transitions, 4722 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:49,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:49,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:49,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:50,735 INFO L124 PetriNetUnfolderBase]: 3550/6107 cut-off events. [2024-05-12 10:42:50,735 INFO L125 PetriNetUnfolderBase]: For 219450/219575 co-relation queries the response was YES. [2024-05-12 10:42:50,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33950 conditions, 6107 events. 3550/6107 cut-off events. For 219450/219575 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 42667 event pairs, 830 based on Foata normal form. 126/6190 useless extension candidates. Maximal degree in co-relation 33818. Up to 4843 conditions per place. [2024-05-12 10:42:50,808 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 242 selfloop transitions, 147 changer transitions 0/403 dead transitions. [2024-05-12 10:42:50,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 403 transitions, 5882 flow [2024-05-12 10:42:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 10:42:50,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-05-12 10:42:50,809 INFO L175 Difference]: Start difference. First operand has 280 places, 374 transitions, 4722 flow. Second operand 8 states and 220 transitions. [2024-05-12 10:42:50,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 403 transitions, 5882 flow [2024-05-12 10:42:51,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 403 transitions, 5658 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-05-12 10:42:51,653 INFO L231 Difference]: Finished difference. Result has 285 places, 377 transitions, 4856 flow [2024-05-12 10:42:51,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4856, PETRI_PLACES=285, PETRI_TRANSITIONS=377} [2024-05-12 10:42:51,653 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 234 predicate places. [2024-05-12 10:42:51,653 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 377 transitions, 4856 flow [2024-05-12 10:42:51,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:51,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:51,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:51,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 10:42:51,654 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:51,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:51,654 INFO L85 PathProgramCache]: Analyzing trace with hash 662159537, now seen corresponding path program 4 times [2024-05-12 10:42:51,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:51,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664831117] [2024-05-12 10:42:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:51,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:51,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:51,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664831117] [2024-05-12 10:42:51,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664831117] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:51,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:51,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:51,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432579621] [2024-05-12 10:42:51,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:51,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:51,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:51,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:51,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:51,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:51,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 377 transitions, 4856 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) [2024-05-12 10:42:51,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:51,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:51,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:52,931 INFO L124 PetriNetUnfolderBase]: 3547/6113 cut-off events. [2024-05-12 10:42:52,931 INFO L125 PetriNetUnfolderBase]: For 224850/224976 co-relation queries the response was YES. [2024-05-12 10:42:52,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33994 conditions, 6113 events. 3547/6113 cut-off events. For 224850/224976 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 42752 event pairs, 837 based on Foata normal form. 123/6193 useless extension candidates. Maximal degree in co-relation 33861. Up to 4840 conditions per place. [2024-05-12 10:42:53,006 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 245 selfloop transitions, 146 changer transitions 0/405 dead transitions. [2024-05-12 10:42:53,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 405 transitions, 6106 flow [2024-05-12 10:42:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:42:53,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60790273556231 [2024-05-12 10:42:53,007 INFO L175 Difference]: Start difference. First operand has 285 places, 377 transitions, 4856 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:42:53,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 405 transitions, 6106 flow [2024-05-12 10:42:53,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 405 transitions, 5780 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:53,850 INFO L231 Difference]: Finished difference. Result has 286 places, 377 transitions, 4828 flow [2024-05-12 10:42:53,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4530, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4828, PETRI_PLACES=286, PETRI_TRANSITIONS=377} [2024-05-12 10:42:53,851 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 235 predicate places. [2024-05-12 10:42:53,851 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 377 transitions, 4828 flow [2024-05-12 10:42:53,851 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) [2024-05-12 10:42:53,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:53,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:53,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 10:42:53,851 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:53,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash -681566359, now seen corresponding path program 5 times [2024-05-12 10:42:53,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:53,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752669938] [2024-05-12 10:42:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:53,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:54,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752669938] [2024-05-12 10:42:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752669938] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:54,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:54,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495679750] [2024-05-12 10:42:54,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:54,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:54,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:54,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 377 transitions, 4828 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) [2024-05-12 10:42:54,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:54,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:54,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:55,007 INFO L124 PetriNetUnfolderBase]: 3555/6124 cut-off events. [2024-05-12 10:42:55,007 INFO L125 PetriNetUnfolderBase]: For 230009/230135 co-relation queries the response was YES. [2024-05-12 10:42:55,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34096 conditions, 6124 events. 3555/6124 cut-off events. For 230009/230135 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42788 event pairs, 778 based on Foata normal form. 127/6216 useless extension candidates. Maximal degree in co-relation 33962. Up to 5109 conditions per place. [2024-05-12 10:42:55,081 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 320 selfloop transitions, 73 changer transitions 0/407 dead transitions. [2024-05-12 10:42:55,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 407 transitions, 5857 flow [2024-05-12 10:42:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 10:42:55,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2024-05-12 10:42:55,082 INFO L175 Difference]: Start difference. First operand has 286 places, 377 transitions, 4828 flow. Second operand 9 states and 237 transitions. [2024-05-12 10:42:55,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 407 transitions, 5857 flow [2024-05-12 10:42:55,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 407 transitions, 5474 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:55,764 INFO L231 Difference]: Finished difference. Result has 290 places, 380 transitions, 4642 flow [2024-05-12 10:42:55,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4642, PETRI_PLACES=290, PETRI_TRANSITIONS=380} [2024-05-12 10:42:55,764 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 239 predicate places. [2024-05-12 10:42:55,764 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 380 transitions, 4642 flow [2024-05-12 10:42:55,764 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) [2024-05-12 10:42:55,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:55,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:55,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 10:42:55,765 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:55,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:55,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1849293459, now seen corresponding path program 6 times [2024-05-12 10:42:55,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:55,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897469414] [2024-05-12 10:42:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:55,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:55,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:55,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897469414] [2024-05-12 10:42:55,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897469414] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:55,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:55,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:55,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063766183] [2024-05-12 10:42:55,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:55,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:55,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:55,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:55,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:56,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:56,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 380 transitions, 4642 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) [2024-05-12 10:42:56,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:56,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:56,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:56,918 INFO L124 PetriNetUnfolderBase]: 3552/6115 cut-off events. [2024-05-12 10:42:56,918 INFO L125 PetriNetUnfolderBase]: For 231665/231798 co-relation queries the response was YES. [2024-05-12 10:42:56,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33694 conditions, 6115 events. 3552/6115 cut-off events. For 231665/231798 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42749 event pairs, 824 based on Foata normal form. 134/6209 useless extension candidates. Maximal degree in co-relation 33559. Up to 4846 conditions per place. [2024-05-12 10:42:56,990 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 249 selfloop transitions, 137 changer transitions 0/400 dead transitions. [2024-05-12 10:42:56,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 400 transitions, 5598 flow [2024-05-12 10:42:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:42:56,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805471124620061 [2024-05-12 10:42:56,991 INFO L175 Difference]: Start difference. First operand has 290 places, 380 transitions, 4642 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:42:56,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 400 transitions, 5598 flow [2024-05-12 10:42:57,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 400 transitions, 5442 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 10:42:57,969 INFO L231 Difference]: Finished difference. Result has 290 places, 380 transitions, 4766 flow [2024-05-12 10:42:57,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4766, PETRI_PLACES=290, PETRI_TRANSITIONS=380} [2024-05-12 10:42:57,969 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 239 predicate places. [2024-05-12 10:42:57,969 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 380 transitions, 4766 flow [2024-05-12 10:42:57,969 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) [2024-05-12 10:42:57,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:57,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:57,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 10:42:57,970 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:57,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:57,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1699922949, now seen corresponding path program 7 times [2024-05-12 10:42:57,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:57,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912629673] [2024-05-12 10:42:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:57,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:58,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:58,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912629673] [2024-05-12 10:42:58,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912629673] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:58,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:58,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:42:58,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81716775] [2024-05-12 10:42:58,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:58,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:42:58,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:42:58,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:42:58,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:42:58,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 380 transitions, 4766 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) [2024-05-12 10:42:58,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:58,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:42:58,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:59,154 INFO L124 PetriNetUnfolderBase]: 3549/6115 cut-off events. [2024-05-12 10:42:59,154 INFO L125 PetriNetUnfolderBase]: For 235297/235429 co-relation queries the response was YES. [2024-05-12 10:42:59,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33937 conditions, 6115 events. 3549/6115 cut-off events. For 235297/235429 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 42826 event pairs, 785 based on Foata normal form. 133/6213 useless extension candidates. Maximal degree in co-relation 33801. Up to 5102 conditions per place. [2024-05-12 10:42:59,232 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 316 selfloop transitions, 72 changer transitions 0/402 dead transitions. [2024-05-12 10:42:59,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 402 transitions, 5594 flow [2024-05-12 10:42:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 10:42:59,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866261398176292 [2024-05-12 10:42:59,233 INFO L175 Difference]: Start difference. First operand has 290 places, 380 transitions, 4766 flow. Second operand 7 states and 193 transitions. [2024-05-12 10:42:59,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 402 transitions, 5594 flow [2024-05-12 10:43:00,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 402 transitions, 5145 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:00,046 INFO L231 Difference]: Finished difference. Result has 290 places, 380 transitions, 4467 flow [2024-05-12 10:43:00,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4317, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4467, PETRI_PLACES=290, PETRI_TRANSITIONS=380} [2024-05-12 10:43:00,047 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 239 predicate places. [2024-05-12 10:43:00,047 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 380 transitions, 4467 flow [2024-05-12 10:43:00,047 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) [2024-05-12 10:43:00,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:00,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:00,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 10:43:00,048 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:00,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash 183710269, now seen corresponding path program 8 times [2024-05-12 10:43:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:00,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843976599] [2024-05-12 10:43:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:00,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:00,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:00,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843976599] [2024-05-12 10:43:00,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843976599] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:00,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:00,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:00,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714958805] [2024-05-12 10:43:00,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:00,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:00,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:00,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:00,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 380 transitions, 4467 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:00,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:00,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:00,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:01,315 INFO L124 PetriNetUnfolderBase]: 3579/6147 cut-off events. [2024-05-12 10:43:01,315 INFO L125 PetriNetUnfolderBase]: For 242058/242197 co-relation queries the response was YES. [2024-05-12 10:43:01,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33933 conditions, 6147 events. 3579/6147 cut-off events. For 242058/242197 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 42966 event pairs, 786 based on Foata normal form. 140/6248 useless extension candidates. Maximal degree in co-relation 33798. Up to 5111 conditions per place. [2024-05-12 10:43:01,390 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 323 selfloop transitions, 85 changer transitions 0/422 dead transitions. [2024-05-12 10:43:01,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 422 transitions, 5774 flow [2024-05-12 10:43:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:43:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:43:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 326 transitions. [2024-05-12 10:43:01,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335515548281505 [2024-05-12 10:43:01,391 INFO L175 Difference]: Start difference. First operand has 290 places, 380 transitions, 4467 flow. Second operand 13 states and 326 transitions. [2024-05-12 10:43:01,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 422 transitions, 5774 flow [2024-05-12 10:43:02,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 422 transitions, 5630 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:43:02,389 INFO L231 Difference]: Finished difference. Result has 298 places, 389 transitions, 4650 flow [2024-05-12 10:43:02,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4650, PETRI_PLACES=298, PETRI_TRANSITIONS=389} [2024-05-12 10:43:02,390 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 247 predicate places. [2024-05-12 10:43:02,390 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 389 transitions, 4650 flow [2024-05-12 10:43:02,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:02,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:02,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:02,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 10:43:02,390 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:02,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:02,391 INFO L85 PathProgramCache]: Analyzing trace with hash 95991869, now seen corresponding path program 9 times [2024-05-12 10:43:02,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:02,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069757591] [2024-05-12 10:43:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:02,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:02,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:02,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069757591] [2024-05-12 10:43:02,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069757591] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:02,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:02,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:02,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434348729] [2024-05-12 10:43:02,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:02,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:02,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:02,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 389 transitions, 4650 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:02,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:02,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:02,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:03,671 INFO L124 PetriNetUnfolderBase]: 3576/6143 cut-off events. [2024-05-12 10:43:03,671 INFO L125 PetriNetUnfolderBase]: For 245415/245554 co-relation queries the response was YES. [2024-05-12 10:43:03,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34019 conditions, 6143 events. 3576/6143 cut-off events. For 245415/245554 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 42970 event pairs, 786 based on Foata normal form. 140/6244 useless extension candidates. Maximal degree in co-relation 33882. Up to 5108 conditions per place. [2024-05-12 10:43:03,748 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 318 selfloop transitions, 85 changer transitions 0/417 dead transitions. [2024-05-12 10:43:03,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 417 transitions, 5662 flow [2024-05-12 10:43:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:43:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:43:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 280 transitions. [2024-05-12 10:43:03,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5415860735009671 [2024-05-12 10:43:03,749 INFO L175 Difference]: Start difference. First operand has 298 places, 389 transitions, 4650 flow. Second operand 11 states and 280 transitions. [2024-05-12 10:43:03,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 417 transitions, 5662 flow [2024-05-12 10:43:04,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 417 transitions, 5492 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-05-12 10:43:04,755 INFO L231 Difference]: Finished difference. Result has 301 places, 389 transitions, 4656 flow [2024-05-12 10:43:04,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4480, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4656, PETRI_PLACES=301, PETRI_TRANSITIONS=389} [2024-05-12 10:43:04,756 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 250 predicate places. [2024-05-12 10:43:04,756 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 389 transitions, 4656 flow [2024-05-12 10:43:04,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:04,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:04,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:04,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 10:43:04,756 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:04,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1954061133, now seen corresponding path program 10 times [2024-05-12 10:43:04,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:04,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83278270] [2024-05-12 10:43:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:04,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:04,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83278270] [2024-05-12 10:43:04,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83278270] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:04,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:04,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:43:04,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776079660] [2024-05-12 10:43:04,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:04,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:43:04,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:43:04,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:43:05,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:05,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 389 transitions, 4656 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) [2024-05-12 10:43:05,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:05,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:05,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:05,990 INFO L124 PetriNetUnfolderBase]: 3606/6211 cut-off events. [2024-05-12 10:43:05,990 INFO L125 PetriNetUnfolderBase]: For 258839/258977 co-relation queries the response was YES. [2024-05-12 10:43:06,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34772 conditions, 6211 events. 3606/6211 cut-off events. For 258839/258977 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 43575 event pairs, 785 based on Foata normal form. 139/6316 useless extension candidates. Maximal degree in co-relation 34633. Up to 4961 conditions per place. [2024-05-12 10:43:06,069 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 259 selfloop transitions, 160 changer transitions 0/433 dead transitions. [2024-05-12 10:43:06,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 433 transitions, 6173 flow [2024-05-12 10:43:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:43:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:43:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-05-12 10:43:06,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886524822695035 [2024-05-12 10:43:06,070 INFO L175 Difference]: Start difference. First operand has 301 places, 389 transitions, 4656 flow. Second operand 9 states and 249 transitions. [2024-05-12 10:43:06,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 433 transitions, 6173 flow [2024-05-12 10:43:07,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 433 transitions, 6003 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-05-12 10:43:07,161 INFO L231 Difference]: Finished difference. Result has 300 places, 398 transitions, 4975 flow [2024-05-12 10:43:07,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4975, PETRI_PLACES=300, PETRI_TRANSITIONS=398} [2024-05-12 10:43:07,162 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 249 predicate places. [2024-05-12 10:43:07,162 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 398 transitions, 4975 flow [2024-05-12 10:43:07,162 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) [2024-05-12 10:43:07,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:07,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:07,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 10:43:07,162 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:07,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:07,162 INFO L85 PathProgramCache]: Analyzing trace with hash 178347889, now seen corresponding path program 11 times [2024-05-12 10:43:07,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:07,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245750043] [2024-05-12 10:43:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:07,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:07,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245750043] [2024-05-12 10:43:07,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245750043] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:07,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:07,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:07,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554819049] [2024-05-12 10:43:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:07,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:07,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:07,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:07,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:07,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 398 transitions, 4975 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:07,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:07,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:07,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:08,423 INFO L124 PetriNetUnfolderBase]: 3603/6204 cut-off events. [2024-05-12 10:43:08,424 INFO L125 PetriNetUnfolderBase]: For 262513/262638 co-relation queries the response was YES. [2024-05-12 10:43:08,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35081 conditions, 6204 events. 3603/6204 cut-off events. For 262513/262638 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 43559 event pairs, 781 based on Foata normal form. 126/6290 useless extension candidates. Maximal degree in co-relation 34941. Up to 5156 conditions per place. [2024-05-12 10:43:08,500 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 327 selfloop transitions, 78 changer transitions 0/419 dead transitions. [2024-05-12 10:43:08,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 419 transitions, 5833 flow [2024-05-12 10:43:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:08,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:43:08,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-05-12 10:43:08,501 INFO L175 Difference]: Start difference. First operand has 300 places, 398 transitions, 4975 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:43:08,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 419 transitions, 5833 flow [2024-05-12 10:43:09,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 419 transitions, 5425 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:09,430 INFO L231 Difference]: Finished difference. Result has 301 places, 398 transitions, 4729 flow [2024-05-12 10:43:09,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4729, PETRI_PLACES=301, PETRI_TRANSITIONS=398} [2024-05-12 10:43:09,431 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 250 predicate places. [2024-05-12 10:43:09,431 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 398 transitions, 4729 flow [2024-05-12 10:43:09,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:09,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:09,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:09,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 10:43:09,431 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:09,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash 148081491, now seen corresponding path program 12 times [2024-05-12 10:43:09,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:09,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331950046] [2024-05-12 10:43:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:09,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:09,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331950046] [2024-05-12 10:43:09,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331950046] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:09,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:09,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:43:09,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830573006] [2024-05-12 10:43:09,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:09,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:43:09,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:09,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:43:09,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:43:09,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:09,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 398 transitions, 4729 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) [2024-05-12 10:43:09,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:09,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:09,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:10,611 INFO L124 PetriNetUnfolderBase]: 3600/6203 cut-off events. [2024-05-12 10:43:10,611 INFO L125 PetriNetUnfolderBase]: For 258635/258773 co-relation queries the response was YES. [2024-05-12 10:43:10,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34511 conditions, 6203 events. 3600/6203 cut-off events. For 258635/258773 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 43506 event pairs, 785 based on Foata normal form. 139/6308 useless extension candidates. Maximal degree in co-relation 34371. Up to 4955 conditions per place. [2024-05-12 10:43:10,689 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 265 selfloop transitions, 155 changer transitions 0/434 dead transitions. [2024-05-12 10:43:10,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 434 transitions, 6099 flow [2024-05-12 10:43:10,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-05-12 10:43:10,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143617021276596 [2024-05-12 10:43:10,690 INFO L175 Difference]: Start difference. First operand has 301 places, 398 transitions, 4729 flow. Second operand 8 states and 231 transitions. [2024-05-12 10:43:10,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 434 transitions, 6099 flow [2024-05-12 10:43:11,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 434 transitions, 5943 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:11,850 INFO L231 Difference]: Finished difference. Result has 302 places, 398 transitions, 4894 flow [2024-05-12 10:43:11,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4573, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4894, PETRI_PLACES=302, PETRI_TRANSITIONS=398} [2024-05-12 10:43:11,851 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 251 predicate places. [2024-05-12 10:43:11,851 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 398 transitions, 4894 flow [2024-05-12 10:43:11,851 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) [2024-05-12 10:43:11,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:11,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:11,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 10:43:11,852 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:11,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash 177902419, now seen corresponding path program 13 times [2024-05-12 10:43:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:11,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516128539] [2024-05-12 10:43:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:12,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516128539] [2024-05-12 10:43:12,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516128539] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:12,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:12,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:43:12,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507099920] [2024-05-12 10:43:12,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:12,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:43:12,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:12,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:43:12,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:43:12,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:12,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 398 transitions, 4894 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) [2024-05-12 10:43:12,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:12,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:12,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:13,019 INFO L124 PetriNetUnfolderBase]: 3597/6195 cut-off events. [2024-05-12 10:43:13,019 INFO L125 PetriNetUnfolderBase]: For 263281/263420 co-relation queries the response was YES. [2024-05-12 10:43:13,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34811 conditions, 6195 events. 3597/6195 cut-off events. For 263281/263420 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43559 event pairs, 824 based on Foata normal form. 140/6295 useless extension candidates. Maximal degree in co-relation 34670. Up to 4952 conditions per place. [2024-05-12 10:43:13,102 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 267 selfloop transitions, 139 changer transitions 0/420 dead transitions. [2024-05-12 10:43:13,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 420 transitions, 6058 flow [2024-05-12 10:43:13,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:43:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:43:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 10:43:13,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6099290780141844 [2024-05-12 10:43:13,103 INFO L175 Difference]: Start difference. First operand has 302 places, 398 transitions, 4894 flow. Second operand 6 states and 172 transitions. [2024-05-12 10:43:13,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 420 transitions, 6058 flow [2024-05-12 10:43:14,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 420 transitions, 5714 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:14,164 INFO L231 Difference]: Finished difference. Result has 301 places, 398 transitions, 4839 flow [2024-05-12 10:43:14,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4554, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4839, PETRI_PLACES=301, PETRI_TRANSITIONS=398} [2024-05-12 10:43:14,164 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 250 predicate places. [2024-05-12 10:43:14,165 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 398 transitions, 4839 flow [2024-05-12 10:43:14,165 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) [2024-05-12 10:43:14,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:14,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:14,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 10:43:14,165 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:14,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:14,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2129088031, now seen corresponding path program 14 times [2024-05-12 10:43:14,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:14,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879231819] [2024-05-12 10:43:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:14,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:14,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:14,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879231819] [2024-05-12 10:43:14,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879231819] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:14,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:14,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:14,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621548469] [2024-05-12 10:43:14,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:14,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:14,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:14,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:14,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 398 transitions, 4839 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:14,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:14,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:14,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:15,407 INFO L124 PetriNetUnfolderBase]: 3594/6191 cut-off events. [2024-05-12 10:43:15,407 INFO L125 PetriNetUnfolderBase]: For 259557/259698 co-relation queries the response was YES. [2024-05-12 10:43:15,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34611 conditions, 6191 events. 3594/6191 cut-off events. For 259557/259698 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43373 event pairs, 781 based on Foata normal form. 142/6299 useless extension candidates. Maximal degree in co-relation 34470. Up to 4949 conditions per place. [2024-05-12 10:43:15,486 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 259 selfloop transitions, 160 changer transitions 0/433 dead transitions. [2024-05-12 10:43:15,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 433 transitions, 5909 flow [2024-05-12 10:43:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:43:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:43:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2024-05-12 10:43:15,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723404255319149 [2024-05-12 10:43:15,487 INFO L175 Difference]: Start difference. First operand has 301 places, 398 transitions, 4839 flow. Second operand 10 states and 269 transitions. [2024-05-12 10:43:15,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 433 transitions, 5909 flow [2024-05-12 10:43:16,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 433 transitions, 5611 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:43:16,635 INFO L231 Difference]: Finished difference. Result has 306 places, 398 transitions, 4871 flow [2024-05-12 10:43:16,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4541, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4871, PETRI_PLACES=306, PETRI_TRANSITIONS=398} [2024-05-12 10:43:16,636 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 255 predicate places. [2024-05-12 10:43:16,636 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 398 transitions, 4871 flow [2024-05-12 10:43:16,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:16,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:16,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:16,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 10:43:16,636 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:16,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:16,636 INFO L85 PathProgramCache]: Analyzing trace with hash -47865091, now seen corresponding path program 15 times [2024-05-12 10:43:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:16,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892332682] [2024-05-12 10:43:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:16,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:16,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:16,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892332682] [2024-05-12 10:43:16,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892332682] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:16,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:16,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:16,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097394334] [2024-05-12 10:43:16,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:16,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:16,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:16,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 398 transitions, 4871 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:16,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:16,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:16,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:17,896 INFO L124 PetriNetUnfolderBase]: 3602/6205 cut-off events. [2024-05-12 10:43:17,896 INFO L125 PetriNetUnfolderBase]: For 265253/265379 co-relation queries the response was YES. [2024-05-12 10:43:17,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34872 conditions, 6205 events. 3602/6205 cut-off events. For 265253/265379 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 43653 event pairs, 779 based on Foata normal form. 127/6296 useless extension candidates. Maximal degree in co-relation 34730. Up to 4958 conditions per place. [2024-05-12 10:43:17,981 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 266 selfloop transitions, 161 changer transitions 0/441 dead transitions. [2024-05-12 10:43:17,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 441 transitions, 6326 flow [2024-05-12 10:43:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:43:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:43:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 336 transitions. [2024-05-12 10:43:17,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5499181669394435 [2024-05-12 10:43:17,982 INFO L175 Difference]: Start difference. First operand has 306 places, 398 transitions, 4871 flow. Second operand 13 states and 336 transitions. [2024-05-12 10:43:17,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 441 transitions, 6326 flow [2024-05-12 10:43:19,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 441 transitions, 5946 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-05-12 10:43:19,140 INFO L231 Difference]: Finished difference. Result has 310 places, 401 transitions, 4884 flow [2024-05-12 10:43:19,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4884, PETRI_PLACES=310, PETRI_TRANSITIONS=401} [2024-05-12 10:43:19,140 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 259 predicate places. [2024-05-12 10:43:19,140 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 401 transitions, 4884 flow [2024-05-12 10:43:19,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:19,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:19,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:19,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 10:43:19,141 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:19,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:19,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1837576883, now seen corresponding path program 16 times [2024-05-12 10:43:19,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:19,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928087691] [2024-05-12 10:43:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:19,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:19,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:19,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928087691] [2024-05-12 10:43:19,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928087691] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:19,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:19,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:19,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542077901] [2024-05-12 10:43:19,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:19,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:19,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:19,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:19,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:19,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:19,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 401 transitions, 4884 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:19,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:19,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:19,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:20,408 INFO L124 PetriNetUnfolderBase]: 3599/6202 cut-off events. [2024-05-12 10:43:20,409 INFO L125 PetriNetUnfolderBase]: For 261912/262038 co-relation queries the response was YES. [2024-05-12 10:43:20,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34716 conditions, 6202 events. 3599/6202 cut-off events. For 261912/262038 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43571 event pairs, 785 based on Foata normal form. 127/6293 useless extension candidates. Maximal degree in co-relation 34573. Up to 4955 conditions per place. [2024-05-12 10:43:20,489 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 257 selfloop transitions, 158 changer transitions 0/429 dead transitions. [2024-05-12 10:43:20,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 429 transitions, 5932 flow [2024-05-12 10:43:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-05-12 10:43:20,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904255319148937 [2024-05-12 10:43:20,490 INFO L175 Difference]: Start difference. First operand has 310 places, 401 transitions, 4884 flow. Second operand 8 states and 222 transitions. [2024-05-12 10:43:20,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 429 transitions, 5932 flow [2024-05-12 10:43:21,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 429 transitions, 5605 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-05-12 10:43:21,467 INFO L231 Difference]: Finished difference. Result has 309 places, 401 transitions, 4885 flow [2024-05-12 10:43:21,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4559, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4885, PETRI_PLACES=309, PETRI_TRANSITIONS=401} [2024-05-12 10:43:21,476 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 258 predicate places. [2024-05-12 10:43:21,476 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 401 transitions, 4885 flow [2024-05-12 10:43:21,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:21,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:21,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:21,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-05-12 10:43:21,477 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:21,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:21,477 INFO L85 PathProgramCache]: Analyzing trace with hash -48132001, now seen corresponding path program 17 times [2024-05-12 10:43:21,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:21,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216715898] [2024-05-12 10:43:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:21,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:21,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:21,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216715898] [2024-05-12 10:43:21,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216715898] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:21,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:21,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:21,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212508906] [2024-05-12 10:43:21,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:21,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:21,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:21,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:21,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:21,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 401 transitions, 4885 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:21,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:21,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:21,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:22,719 INFO L124 PetriNetUnfolderBase]: 3596/6183 cut-off events. [2024-05-12 10:43:22,720 INFO L125 PetriNetUnfolderBase]: For 257913/258056 co-relation queries the response was YES. [2024-05-12 10:43:22,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34531 conditions, 6183 events. 3596/6183 cut-off events. For 257913/258056 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43278 event pairs, 784 based on Foata normal form. 144/6291 useless extension candidates. Maximal degree in co-relation 34388. Up to 4952 conditions per place. [2024-05-12 10:43:22,797 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 260 selfloop transitions, 161 changer transitions 0/435 dead transitions. [2024-05-12 10:43:22,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 435 transitions, 5957 flow [2024-05-12 10:43:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:43:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:43:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 289 transitions. [2024-05-12 10:43:22,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589941972920697 [2024-05-12 10:43:22,798 INFO L175 Difference]: Start difference. First operand has 309 places, 401 transitions, 4885 flow. Second operand 11 states and 289 transitions. [2024-05-12 10:43:22,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 435 transitions, 5957 flow [2024-05-12 10:43:23,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 435 transitions, 5623 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-05-12 10:43:23,828 INFO L231 Difference]: Finished difference. Result has 312 places, 401 transitions, 4885 flow [2024-05-12 10:43:23,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4553, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4885, PETRI_PLACES=312, PETRI_TRANSITIONS=401} [2024-05-12 10:43:23,828 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 261 predicate places. [2024-05-12 10:43:23,828 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 401 transitions, 4885 flow [2024-05-12 10:43:23,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:23,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:23,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:23,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-05-12 10:43:23,829 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:23,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash 146074319, now seen corresponding path program 18 times [2024-05-12 10:43:23,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:23,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604191738] [2024-05-12 10:43:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:23,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:24,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:24,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604191738] [2024-05-12 10:43:24,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604191738] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:24,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:24,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:43:24,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663529818] [2024-05-12 10:43:24,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:24,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:43:24,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:43:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:43:24,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:24,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 401 transitions, 4885 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) [2024-05-12 10:43:24,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:24,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:24,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:24,994 INFO L124 PetriNetUnfolderBase]: 3593/6171 cut-off events. [2024-05-12 10:43:24,994 INFO L125 PetriNetUnfolderBase]: For 253833/253989 co-relation queries the response was YES. [2024-05-12 10:43:25,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34418 conditions, 6171 events. 3593/6171 cut-off events. For 253833/253989 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 43095 event pairs, 749 based on Foata normal form. 157/6296 useless extension candidates. Maximal degree in co-relation 34275. Up to 5189 conditions per place. [2024-05-12 10:43:25,072 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 359 selfloop transitions, 56 changer transitions 0/429 dead transitions. [2024-05-12 10:43:25,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 429 transitions, 5960 flow [2024-05-12 10:43:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:43:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:43:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 10:43:25,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-05-12 10:43:25,073 INFO L175 Difference]: Start difference. First operand has 312 places, 401 transitions, 4885 flow. Second operand 6 states and 179 transitions. [2024-05-12 10:43:25,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 429 transitions, 5960 flow [2024-05-12 10:43:26,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 429 transitions, 5666 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-05-12 10:43:26,278 INFO L231 Difference]: Finished difference. Result has 309 places, 402 transitions, 4772 flow [2024-05-12 10:43:26,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4594, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4772, PETRI_PLACES=309, PETRI_TRANSITIONS=402} [2024-05-12 10:43:26,279 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 258 predicate places. [2024-05-12 10:43:26,279 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 402 transitions, 4772 flow [2024-05-12 10:43:26,279 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) [2024-05-12 10:43:26,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:26,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:26,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-05-12 10:43:26,279 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:26,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1573130943, now seen corresponding path program 19 times [2024-05-12 10:43:26,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:26,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949607010] [2024-05-12 10:43:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:26,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:26,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:26,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949607010] [2024-05-12 10:43:26,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949607010] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:26,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:26,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:43:26,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126796768] [2024-05-12 10:43:26,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:26,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:43:26,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:26,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:43:26,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:43:26,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:26,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 402 transitions, 4772 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) [2024-05-12 10:43:26,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:26,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:26,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:27,527 INFO L124 PetriNetUnfolderBase]: 3590/6180 cut-off events. [2024-05-12 10:43:27,528 INFO L125 PetriNetUnfolderBase]: For 251807/251941 co-relation queries the response was YES. [2024-05-12 10:43:27,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34132 conditions, 6180 events. 3590/6180 cut-off events. For 251807/251941 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 43296 event pairs, 755 based on Foata normal form. 135/6285 useless extension candidates. Maximal degree in co-relation 33988. Up to 5186 conditions per place. [2024-05-12 10:43:27,594 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 355 selfloop transitions, 59 changer transitions 0/428 dead transitions. [2024-05-12 10:43:27,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 428 transitions, 5664 flow [2024-05-12 10:43:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:43:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:43:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 10:43:27,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-05-12 10:43:27,596 INFO L175 Difference]: Start difference. First operand has 309 places, 402 transitions, 4772 flow. Second operand 6 states and 179 transitions. [2024-05-12 10:43:27,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 428 transitions, 5664 flow [2024-05-12 10:43:28,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 428 transitions, 5573 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 10:43:28,493 INFO L231 Difference]: Finished difference. Result has 312 places, 402 transitions, 4813 flow [2024-05-12 10:43:28,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4681, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4813, PETRI_PLACES=312, PETRI_TRANSITIONS=402} [2024-05-12 10:43:28,494 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 261 predicate places. [2024-05-12 10:43:28,494 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 402 transitions, 4813 flow [2024-05-12 10:43:28,494 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) [2024-05-12 10:43:28,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:28,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:28,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-05-12 10:43:28,494 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:28,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:28,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1942591967, now seen corresponding path program 1 times [2024-05-12 10:43:28,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:28,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861871353] [2024-05-12 10:43:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:28,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:28,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:28,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861871353] [2024-05-12 10:43:28,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861871353] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:28,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:28,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:28,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314315423] [2024-05-12 10:43:28,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:28,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:28,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:28,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:28,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:28,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 402 transitions, 4813 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:28,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:28,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:28,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:29,743 INFO L124 PetriNetUnfolderBase]: 3766/6477 cut-off events. [2024-05-12 10:43:29,744 INFO L125 PetriNetUnfolderBase]: For 339660/339816 co-relation queries the response was YES. [2024-05-12 10:43:29,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37221 conditions, 6477 events. 3766/6477 cut-off events. For 339660/339816 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 45871 event pairs, 826 based on Foata normal form. 168/6601 useless extension candidates. Maximal degree in co-relation 37076. Up to 4700 conditions per place. [2024-05-12 10:43:29,825 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 243 selfloop transitions, 185 changer transitions 0/442 dead transitions. [2024-05-12 10:43:29,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 442 transitions, 6037 flow [2024-05-12 10:43:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-05-12 10:43:29,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-05-12 10:43:29,826 INFO L175 Difference]: Start difference. First operand has 312 places, 402 transitions, 4813 flow. Second operand 8 states and 228 transitions. [2024-05-12 10:43:29,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 442 transitions, 6037 flow [2024-05-12 10:43:31,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 442 transitions, 5706 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 10:43:31,119 INFO L231 Difference]: Finished difference. Result has 311 places, 406 transitions, 4965 flow [2024-05-12 10:43:31,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4965, PETRI_PLACES=311, PETRI_TRANSITIONS=406} [2024-05-12 10:43:31,120 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 260 predicate places. [2024-05-12 10:43:31,120 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 406 transitions, 4965 flow [2024-05-12 10:43:31,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:31,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:31,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:31,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-05-12 10:43:31,121 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:31,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:31,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1853878337, now seen corresponding path program 2 times [2024-05-12 10:43:31,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:31,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12455828] [2024-05-12 10:43:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:31,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:31,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:31,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12455828] [2024-05-12 10:43:31,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12455828] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:31,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:31,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:31,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412244546] [2024-05-12 10:43:31,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:31,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:31,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:31,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:31,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:31,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 406 transitions, 4965 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:31,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:31,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:31,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:32,437 INFO L124 PetriNetUnfolderBase]: 3858/6634 cut-off events. [2024-05-12 10:43:32,437 INFO L125 PetriNetUnfolderBase]: For 365584/365752 co-relation queries the response was YES. [2024-05-12 10:43:32,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38841 conditions, 6634 events. 3858/6634 cut-off events. For 365584/365752 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 47173 event pairs, 886 based on Foata normal form. 184/6774 useless extension candidates. Maximal degree in co-relation 38695. Up to 5195 conditions per place. [2024-05-12 10:43:32,518 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 249 selfloop transitions, 173 changer transitions 0/436 dead transitions. [2024-05-12 10:43:32,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 436 transitions, 5947 flow [2024-05-12 10:43:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:32,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 10:43:32,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877659574468085 [2024-05-12 10:43:32,519 INFO L175 Difference]: Start difference. First operand has 311 places, 406 transitions, 4965 flow. Second operand 8 states and 221 transitions. [2024-05-12 10:43:32,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 436 transitions, 5947 flow [2024-05-12 10:43:33,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 436 transitions, 5690 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 10:43:33,651 INFO L231 Difference]: Finished difference. Result has 315 places, 408 transitions, 5120 flow [2024-05-12 10:43:33,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5120, PETRI_PLACES=315, PETRI_TRANSITIONS=408} [2024-05-12 10:43:33,651 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 264 predicate places. [2024-05-12 10:43:33,651 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 408 transitions, 5120 flow [2024-05-12 10:43:33,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:33,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:33,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:33,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-05-12 10:43:33,652 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:33,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:33,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1854026207, now seen corresponding path program 3 times [2024-05-12 10:43:33,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:33,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915632400] [2024-05-12 10:43:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:33,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:33,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915632400] [2024-05-12 10:43:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915632400] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:33,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:33,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411991030] [2024-05-12 10:43:33,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:33,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:33,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:33,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:33,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 408 transitions, 5120 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:33,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:33,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:33,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:34,958 INFO L124 PetriNetUnfolderBase]: 3924/6731 cut-off events. [2024-05-12 10:43:34,959 INFO L125 PetriNetUnfolderBase]: For 359751/359935 co-relation queries the response was YES. [2024-05-12 10:43:35,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39814 conditions, 6731 events. 3924/6731 cut-off events. For 359751/359935 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 48013 event pairs, 910 based on Foata normal form. 196/6883 useless extension candidates. Maximal degree in co-relation 39666. Up to 5199 conditions per place. [2024-05-12 10:43:35,049 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 250 selfloop transitions, 177 changer transitions 0/441 dead transitions. [2024-05-12 10:43:35,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 441 transitions, 6126 flow [2024-05-12 10:43:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-05-12 10:43:35,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:43:35,050 INFO L175 Difference]: Start difference. First operand has 315 places, 408 transitions, 5120 flow. Second operand 8 states and 224 transitions. [2024-05-12 10:43:35,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 441 transitions, 6126 flow [2024-05-12 10:43:36,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 441 transitions, 5758 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-05-12 10:43:36,360 INFO L231 Difference]: Finished difference. Result has 317 places, 410 transitions, 5169 flow [2024-05-12 10:43:36,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4752, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5169, PETRI_PLACES=317, PETRI_TRANSITIONS=410} [2024-05-12 10:43:36,361 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 266 predicate places. [2024-05-12 10:43:36,361 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 410 transitions, 5169 flow [2024-05-12 10:43:36,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:36,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:36,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:36,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-05-12 10:43:36,361 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:36,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash 90906319, now seen corresponding path program 4 times [2024-05-12 10:43:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:36,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61729277] [2024-05-12 10:43:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:36,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:36,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:36,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61729277] [2024-05-12 10:43:36,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61729277] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:36,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:36,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:36,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513233555] [2024-05-12 10:43:36,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:36,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:36,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:36,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:36,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:36,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:36,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 410 transitions, 5169 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:36,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:36,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:36,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:37,793 INFO L124 PetriNetUnfolderBase]: 4016/6870 cut-off events. [2024-05-12 10:43:37,794 INFO L125 PetriNetUnfolderBase]: For 384299/384495 co-relation queries the response was YES. [2024-05-12 10:43:37,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40789 conditions, 6870 events. 4016/6870 cut-off events. For 384299/384495 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 48994 event pairs, 873 based on Foata normal form. 212/7042 useless extension candidates. Maximal degree in co-relation 40640. Up to 5690 conditions per place. [2024-05-12 10:43:37,891 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 345 selfloop transitions, 78 changer transitions 0/437 dead transitions. [2024-05-12 10:43:37,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 437 transitions, 6147 flow [2024-05-12 10:43:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-05-12 10:43:37,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771276595744681 [2024-05-12 10:43:37,892 INFO L175 Difference]: Start difference. First operand has 317 places, 410 transitions, 5169 flow. Second operand 8 states and 217 transitions. [2024-05-12 10:43:37,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 437 transitions, 6147 flow [2024-05-12 10:43:39,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 437 transitions, 5760 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-05-12 10:43:39,334 INFO L231 Difference]: Finished difference. Result has 319 places, 412 transitions, 5006 flow [2024-05-12 10:43:39,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5006, PETRI_PLACES=319, PETRI_TRANSITIONS=412} [2024-05-12 10:43:39,335 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 268 predicate places. [2024-05-12 10:43:39,335 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 412 transitions, 5006 flow [2024-05-12 10:43:39,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:39,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:39,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:39,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-05-12 10:43:39,336 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:39,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:39,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1725510313, now seen corresponding path program 5 times [2024-05-12 10:43:39,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:39,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731961615] [2024-05-12 10:43:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:39,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:39,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:39,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731961615] [2024-05-12 10:43:39,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731961615] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:39,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:39,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:39,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214254590] [2024-05-12 10:43:39,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:39,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:39,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:39,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:39,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:39,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:39,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 412 transitions, 5006 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:39,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:39,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:39,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:40,921 INFO L124 PetriNetUnfolderBase]: 4108/7022 cut-off events. [2024-05-12 10:43:40,921 INFO L125 PetriNetUnfolderBase]: For 395207/395419 co-relation queries the response was YES. [2024-05-12 10:43:40,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41382 conditions, 7022 events. 4108/7022 cut-off events. For 395207/395419 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 50306 event pairs, 891 based on Foata normal form. 228/7210 useless extension candidates. Maximal degree in co-relation 41232. Up to 5830 conditions per place. [2024-05-12 10:43:41,004 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 350 selfloop transitions, 79 changer transitions 0/443 dead transitions. [2024-05-12 10:43:41,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 443 transitions, 6008 flow [2024-05-12 10:43:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:43:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:43:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-05-12 10:43:41,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553191489361702 [2024-05-12 10:43:41,005 INFO L175 Difference]: Start difference. First operand has 319 places, 412 transitions, 5006 flow. Second operand 10 states and 261 transitions. [2024-05-12 10:43:41,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 443 transitions, 6008 flow [2024-05-12 10:43:42,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 443 transitions, 5822 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 10:43:42,418 INFO L231 Difference]: Finished difference. Result has 323 places, 414 transitions, 5050 flow [2024-05-12 10:43:42,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4820, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5050, PETRI_PLACES=323, PETRI_TRANSITIONS=414} [2024-05-12 10:43:42,418 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 272 predicate places. [2024-05-12 10:43:42,418 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 414 transitions, 5050 flow [2024-05-12 10:43:42,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:42,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:42,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:42,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-05-12 10:43:42,418 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:42,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1720000063, now seen corresponding path program 6 times [2024-05-12 10:43:42,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:42,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463261709] [2024-05-12 10:43:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:42,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:42,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:42,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463261709] [2024-05-12 10:43:42,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463261709] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:42,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:42,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:42,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639325559] [2024-05-12 10:43:42,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:42,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:42,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:42,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:42,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:42,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:42,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 414 transitions, 5050 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:42,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:42,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:42,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:43,848 INFO L124 PetriNetUnfolderBase]: 4174/7124 cut-off events. [2024-05-12 10:43:43,848 INFO L125 PetriNetUnfolderBase]: For 391810/392034 co-relation queries the response was YES. [2024-05-12 10:43:43,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42016 conditions, 7124 events. 4174/7124 cut-off events. For 391810/392034 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 51062 event pairs, 885 based on Foata normal form. 236/7320 useless extension candidates. Maximal degree in co-relation 41865. Up to 5730 conditions per place. [2024-05-12 10:43:43,945 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 346 selfloop transitions, 84 changer transitions 0/444 dead transitions. [2024-05-12 10:43:43,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 444 transitions, 6066 flow [2024-05-12 10:43:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 10:43:43,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5824468085106383 [2024-05-12 10:43:43,946 INFO L175 Difference]: Start difference. First operand has 323 places, 414 transitions, 5050 flow. Second operand 8 states and 219 transitions. [2024-05-12 10:43:43,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 444 transitions, 6066 flow [2024-05-12 10:43:45,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 444 transitions, 5874 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-05-12 10:43:45,619 INFO L231 Difference]: Finished difference. Result has 323 places, 416 transitions, 5101 flow [2024-05-12 10:43:45,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4858, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5101, PETRI_PLACES=323, PETRI_TRANSITIONS=416} [2024-05-12 10:43:45,619 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 272 predicate places. [2024-05-12 10:43:45,619 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 416 transitions, 5101 flow [2024-05-12 10:43:45,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:45,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:45,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:45,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-05-12 10:43:45,620 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:45,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1725725515, now seen corresponding path program 1 times [2024-05-12 10:43:45,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:45,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917297591] [2024-05-12 10:43:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:45,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:45,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:45,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917297591] [2024-05-12 10:43:45,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917297591] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:45,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:45,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:45,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771345101] [2024-05-12 10:43:45,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:45,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:45,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:45,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:45,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 416 transitions, 5101 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:45,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:45,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:45,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:47,069 INFO L124 PetriNetUnfolderBase]: 4240/7238 cut-off events. [2024-05-12 10:43:47,069 INFO L125 PetriNetUnfolderBase]: For 399284/399520 co-relation queries the response was YES. [2024-05-12 10:43:47,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42590 conditions, 7238 events. 4240/7238 cut-off events. For 399284/399520 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 52018 event pairs, 905 based on Foata normal form. 248/7446 useless extension candidates. Maximal degree in co-relation 42438. Up to 5832 conditions per place. [2024-05-12 10:43:47,168 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 350 selfloop transitions, 86 changer transitions 0/450 dead transitions. [2024-05-12 10:43:47,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 450 transitions, 6125 flow [2024-05-12 10:43:47,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:43:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:43:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-05-12 10:43:47,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2024-05-12 10:43:47,169 INFO L175 Difference]: Start difference. First operand has 323 places, 416 transitions, 5101 flow. Second operand 10 states and 263 transitions. [2024-05-12 10:43:47,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 450 transitions, 6125 flow [2024-05-12 10:43:48,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 450 transitions, 5912 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-05-12 10:43:48,926 INFO L231 Difference]: Finished difference. Result has 327 places, 418 transitions, 5125 flow [2024-05-12 10:43:48,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4888, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5125, PETRI_PLACES=327, PETRI_TRANSITIONS=418} [2024-05-12 10:43:48,926 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 276 predicate places. [2024-05-12 10:43:48,926 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 418 transitions, 5125 flow [2024-05-12 10:43:48,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:48,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:48,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:48,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-05-12 10:43:48,927 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:48,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:48,927 INFO L85 PathProgramCache]: Analyzing trace with hash -934851077, now seen corresponding path program 7 times [2024-05-12 10:43:48,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:48,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407654434] [2024-05-12 10:43:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:48,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:49,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:49,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407654434] [2024-05-12 10:43:49,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407654434] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:49,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:49,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:49,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898530665] [2024-05-12 10:43:49,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:49,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:49,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:49,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:49,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:49,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:49,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 418 transitions, 5125 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:49,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:49,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:49,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:50,481 INFO L124 PetriNetUnfolderBase]: 4345/7389 cut-off events. [2024-05-12 10:43:50,481 INFO L125 PetriNetUnfolderBase]: For 424862/425126 co-relation queries the response was YES. [2024-05-12 10:43:50,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43634 conditions, 7389 events. 4345/7389 cut-off events. For 424862/425126 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 53162 event pairs, 824 based on Foata normal form. 280/7639 useless extension candidates. Maximal degree in co-relation 43481. Up to 6171 conditions per place. [2024-05-12 10:43:50,579 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 376 selfloop transitions, 67 changer transitions 0/457 dead transitions. [2024-05-12 10:43:50,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 457 transitions, 6203 flow [2024-05-12 10:43:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 10:43:50,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352583586626139 [2024-05-12 10:43:50,580 INFO L175 Difference]: Start difference. First operand has 327 places, 418 transitions, 5125 flow. Second operand 7 states and 209 transitions. [2024-05-12 10:43:50,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 457 transitions, 6203 flow [2024-05-12 10:43:52,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 457 transitions, 5994 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-05-12 10:43:52,390 INFO L231 Difference]: Finished difference. Result has 326 places, 422 transitions, 5162 flow [2024-05-12 10:43:52,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4916, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5162, PETRI_PLACES=326, PETRI_TRANSITIONS=422} [2024-05-12 10:43:52,391 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 275 predicate places. [2024-05-12 10:43:52,391 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 422 transitions, 5162 flow [2024-05-12 10:43:52,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:52,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:52,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:52,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-05-12 10:43:52,391 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:52,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1128790487, now seen corresponding path program 8 times [2024-05-12 10:43:52,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:52,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468985876] [2024-05-12 10:43:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:52,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:52,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:52,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468985876] [2024-05-12 10:43:52,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468985876] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:52,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:52,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:52,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326174783] [2024-05-12 10:43:52,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:52,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:52,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:52,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:52,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:52,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:52,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 422 transitions, 5162 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:52,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:52,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:52,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:53,909 INFO L124 PetriNetUnfolderBase]: 4437/7537 cut-off events. [2024-05-12 10:43:53,909 INFO L125 PetriNetUnfolderBase]: For 440785/441055 co-relation queries the response was YES. [2024-05-12 10:43:53,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44707 conditions, 7537 events. 4437/7537 cut-off events. For 440785/441055 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 54418 event pairs, 945 based on Foata normal form. 286/7787 useless extension candidates. Maximal degree in co-relation 44553. Up to 6031 conditions per place. [2024-05-12 10:43:54,017 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 279 selfloop transitions, 166 changer transitions 0/459 dead transitions. [2024-05-12 10:43:54,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 459 transitions, 6224 flow [2024-05-12 10:43:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:43:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:43:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-05-12 10:43:54,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-05-12 10:43:54,018 INFO L175 Difference]: Start difference. First operand has 326 places, 422 transitions, 5162 flow. Second operand 10 states and 270 transitions. [2024-05-12 10:43:54,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 459 transitions, 6224 flow [2024-05-12 10:43:55,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 459 transitions, 6076 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 10:43:55,951 INFO L231 Difference]: Finished difference. Result has 332 places, 424 transitions, 5434 flow [2024-05-12 10:43:55,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5014, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5434, PETRI_PLACES=332, PETRI_TRANSITIONS=424} [2024-05-12 10:43:55,951 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 281 predicate places. [2024-05-12 10:43:55,952 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 424 transitions, 5434 flow [2024-05-12 10:43:55,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:55,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:55,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:55,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-05-12 10:43:55,952 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:55,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:55,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1134152867, now seen corresponding path program 9 times [2024-05-12 10:43:55,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:55,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12720733] [2024-05-12 10:43:55,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:55,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:56,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12720733] [2024-05-12 10:43:56,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12720733] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:56,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:56,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:56,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129405014] [2024-05-12 10:43:56,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:56,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:56,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:56,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:43:56,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:43:56,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 424 transitions, 5434 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:56,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:56,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:43:56,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:57,486 INFO L124 PetriNetUnfolderBase]: 4511/7657 cut-off events. [2024-05-12 10:43:57,487 INFO L125 PetriNetUnfolderBase]: For 444680/444964 co-relation queries the response was YES. [2024-05-12 10:43:57,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45777 conditions, 7657 events. 4511/7657 cut-off events. For 444680/444964 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 55395 event pairs, 965 based on Foata normal form. 300/7921 useless extension candidates. Maximal degree in co-relation 45622. Up to 6145 conditions per place. [2024-05-12 10:43:57,595 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 280 selfloop transitions, 163 changer transitions 0/457 dead transitions. [2024-05-12 10:43:57,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 457 transitions, 6488 flow [2024-05-12 10:43:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:43:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:43:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-05-12 10:43:57,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:43:57,596 INFO L175 Difference]: Start difference. First operand has 332 places, 424 transitions, 5434 flow. Second operand 8 states and 224 transitions. [2024-05-12 10:43:57,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 457 transitions, 6488 flow [2024-05-12 10:43:59,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 457 transitions, 6108 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-05-12 10:43:59,737 INFO L231 Difference]: Finished difference. Result has 332 places, 426 transitions, 5472 flow [2024-05-12 10:43:59,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5058, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5472, PETRI_PLACES=332, PETRI_TRANSITIONS=426} [2024-05-12 10:43:59,737 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 281 predicate places. [2024-05-12 10:43:59,737 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 426 transitions, 5472 flow [2024-05-12 10:43:59,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:59,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:59,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:59,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-05-12 10:43:59,738 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:59,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:59,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1837714833, now seen corresponding path program 10 times [2024-05-12 10:43:59,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:59,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062353953] [2024-05-12 10:43:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:59,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:59,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:59,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062353953] [2024-05-12 10:43:59,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062353953] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:59,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:59,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:43:59,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058266619] [2024-05-12 10:43:59,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:59,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:43:59,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:59,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:43:59,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:44:00,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:00,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 426 transitions, 5472 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:00,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:00,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:00,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:01,410 INFO L124 PetriNetUnfolderBase]: 4531/7682 cut-off events. [2024-05-12 10:44:01,411 INFO L125 PetriNetUnfolderBase]: For 404894/405199 co-relation queries the response was YES. [2024-05-12 10:44:01,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45116 conditions, 7682 events. 4531/7682 cut-off events. For 404894/405199 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 55563 event pairs, 860 based on Foata normal form. 317/7963 useless extension candidates. Maximal degree in co-relation 44960. Up to 5533 conditions per place. [2024-05-12 10:44:01,501 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 269 selfloop transitions, 182 changer transitions 0/465 dead transitions. [2024-05-12 10:44:01,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 465 transitions, 6706 flow [2024-05-12 10:44:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:44:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:44:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-05-12 10:44:01,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143617021276596 [2024-05-12 10:44:01,502 INFO L175 Difference]: Start difference. First operand has 332 places, 426 transitions, 5472 flow. Second operand 8 states and 231 transitions. [2024-05-12 10:44:01,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 465 transitions, 6706 flow [2024-05-12 10:44:03,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 465 transitions, 6332 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-05-12 10:44:03,381 INFO L231 Difference]: Finished difference. Result has 334 places, 427 transitions, 5517 flow [2024-05-12 10:44:03,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5517, PETRI_PLACES=334, PETRI_TRANSITIONS=427} [2024-05-12 10:44:03,381 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 283 predicate places. [2024-05-12 10:44:03,381 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 427 transitions, 5517 flow [2024-05-12 10:44:03,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:03,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:03,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:03,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-05-12 10:44:03,381 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:03,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash -934635875, now seen corresponding path program 2 times [2024-05-12 10:44:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:03,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341077127] [2024-05-12 10:44:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:03,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:03,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:03,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341077127] [2024-05-12 10:44:03,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341077127] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:03,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:03,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:44:03,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183094727] [2024-05-12 10:44:03,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:03,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:44:03,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:03,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:44:03,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:44:03,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:03,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 427 transitions, 5517 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:03,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:03,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:03,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:04,975 INFO L124 PetriNetUnfolderBase]: 4597/7783 cut-off events. [2024-05-12 10:44:04,975 INFO L125 PetriNetUnfolderBase]: For 402101/402433 co-relation queries the response was YES. [2024-05-12 10:44:05,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45665 conditions, 7783 events. 4597/7783 cut-off events. For 402101/402433 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 56289 event pairs, 845 based on Foata normal form. 344/8097 useless extension candidates. Maximal degree in co-relation 45508. Up to 6461 conditions per place. [2024-05-12 10:44:05,086 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 381 selfloop transitions, 69 changer transitions 0/464 dead transitions. [2024-05-12 10:44:05,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 464 transitions, 6585 flow [2024-05-12 10:44:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:44:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:44:05,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-05-12 10:44:05,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291793313069909 [2024-05-12 10:44:05,087 INFO L175 Difference]: Start difference. First operand has 334 places, 427 transitions, 5517 flow. Second operand 7 states and 207 transitions. [2024-05-12 10:44:05,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 464 transitions, 6585 flow [2024-05-12 10:44:07,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 464 transitions, 6166 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-05-12 10:44:07,115 INFO L231 Difference]: Finished difference. Result has 335 places, 429 transitions, 5305 flow [2024-05-12 10:44:07,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5098, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5305, PETRI_PLACES=335, PETRI_TRANSITIONS=429} [2024-05-12 10:44:07,116 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 284 predicate places. [2024-05-12 10:44:07,116 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 429 transitions, 5305 flow [2024-05-12 10:44:07,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:07,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:07,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:07,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-05-12 10:44:07,116 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:07,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:07,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1128575285, now seen corresponding path program 3 times [2024-05-12 10:44:07,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:07,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361949264] [2024-05-12 10:44:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:07,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:07,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:07,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361949264] [2024-05-12 10:44:07,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361949264] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:07,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:07,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:44:07,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657070678] [2024-05-12 10:44:07,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:07,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:44:07,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:44:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:44:07,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:07,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 429 transitions, 5305 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:07,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:07,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:07,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:08,888 INFO L124 PetriNetUnfolderBase]: 4663/7923 cut-off events. [2024-05-12 10:44:08,888 INFO L125 PetriNetUnfolderBase]: For 408764/409078 co-relation queries the response was YES. [2024-05-12 10:44:08,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45625 conditions, 7923 events. 4663/7923 cut-off events. For 408764/409078 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 57706 event pairs, 963 based on Foata normal form. 326/8213 useless extension candidates. Maximal degree in co-relation 45467. Up to 5977 conditions per place. [2024-05-12 10:44:09,007 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 275 selfloop transitions, 180 changer transitions 0/469 dead transitions. [2024-05-12 10:44:09,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 469 transitions, 6391 flow [2024-05-12 10:44:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:44:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:44:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-05-12 10:44:09,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787234042553191 [2024-05-12 10:44:09,009 INFO L175 Difference]: Start difference. First operand has 335 places, 429 transitions, 5305 flow. Second operand 10 states and 272 transitions. [2024-05-12 10:44:09,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 469 transitions, 6391 flow [2024-05-12 10:44:11,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 469 transitions, 6212 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-05-12 10:44:11,117 INFO L231 Difference]: Finished difference. Result has 340 places, 431 transitions, 5562 flow [2024-05-12 10:44:11,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5562, PETRI_PLACES=340, PETRI_TRANSITIONS=431} [2024-05-12 10:44:11,117 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 289 predicate places. [2024-05-12 10:44:11,117 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 431 transitions, 5562 flow [2024-05-12 10:44:11,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:11,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:11,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:11,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-05-12 10:44:11,118 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:11,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:11,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1306941631, now seen corresponding path program 4 times [2024-05-12 10:44:11,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:11,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128093080] [2024-05-12 10:44:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:11,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:11,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:11,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128093080] [2024-05-12 10:44:11,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128093080] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:11,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:11,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:44:11,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630965000] [2024-05-12 10:44:11,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:11,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:44:11,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:44:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:44:11,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:11,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 431 transitions, 5562 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:11,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:11,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:11,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:12,746 INFO L124 PetriNetUnfolderBase]: 4765/8075 cut-off events. [2024-05-12 10:44:12,747 INFO L125 PetriNetUnfolderBase]: For 438760/439101 co-relation queries the response was YES. [2024-05-12 10:44:12,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47811 conditions, 8075 events. 4765/8075 cut-off events. For 438760/439101 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 58968 event pairs, 856 based on Foata normal form. 353/8396 useless extension candidates. Maximal degree in co-relation 47652. Up to 6303 conditions per place. [2024-05-12 10:44:12,863 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 382 selfloop transitions, 72 changer transitions 0/468 dead transitions. [2024-05-12 10:44:12,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 468 transitions, 6846 flow [2024-05-12 10:44:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:44:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:44:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:44:12,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6200607902735562 [2024-05-12 10:44:12,864 INFO L175 Difference]: Start difference. First operand has 340 places, 431 transitions, 5562 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:44:12,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 468 transitions, 6846 flow [2024-05-12 10:44:15,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 468 transitions, 6436 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-05-12 10:44:15,166 INFO L231 Difference]: Finished difference. Result has 340 places, 434 transitions, 5440 flow [2024-05-12 10:44:15,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5158, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5440, PETRI_PLACES=340, PETRI_TRANSITIONS=434} [2024-05-12 10:44:15,167 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 289 predicate places. [2024-05-12 10:44:15,167 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 434 transitions, 5440 flow [2024-05-12 10:44:15,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:15,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:15,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:15,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-05-12 10:44:15,168 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:15,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:15,168 INFO L85 PathProgramCache]: Analyzing trace with hash 733569801, now seen corresponding path program 1 times [2024-05-12 10:44:15,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:15,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404599258] [2024-05-12 10:44:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:15,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:15,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404599258] [2024-05-12 10:44:15,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404599258] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:15,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:15,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:15,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39447314] [2024-05-12 10:44:15,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:15,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:15,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:15,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:15,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:15,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 434 transitions, 5440 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:15,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:15,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:15,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:16,821 INFO L124 PetriNetUnfolderBase]: 4804/8063 cut-off events. [2024-05-12 10:44:16,821 INFO L125 PetriNetUnfolderBase]: For 401402/401743 co-relation queries the response was YES. [2024-05-12 10:44:16,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47696 conditions, 8063 events. 4804/8063 cut-off events. For 401402/401743 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 58920 event pairs, 897 based on Foata normal form. 338/8374 useless extension candidates. Maximal degree in co-relation 47535. Up to 6695 conditions per place. [2024-05-12 10:44:16,935 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 367 selfloop transitions, 114 changer transitions 0/495 dead transitions. [2024-05-12 10:44:16,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 495 transitions, 7208 flow [2024-05-12 10:44:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:44:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:44:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2024-05-12 10:44:16,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-05-12 10:44:16,936 INFO L175 Difference]: Start difference. First operand has 340 places, 434 transitions, 5440 flow. Second operand 9 states and 264 transitions. [2024-05-12 10:44:16,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 495 transitions, 7208 flow [2024-05-12 10:44:19,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 495 transitions, 7080 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-05-12 10:44:19,245 INFO L231 Difference]: Finished difference. Result has 345 places, 446 transitions, 5704 flow [2024-05-12 10:44:19,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5704, PETRI_PLACES=345, PETRI_TRANSITIONS=446} [2024-05-12 10:44:19,246 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 294 predicate places. [2024-05-12 10:44:19,246 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 446 transitions, 5704 flow [2024-05-12 10:44:19,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:19,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:19,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:19,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-05-12 10:44:19,246 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:19,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:19,247 INFO L85 PathProgramCache]: Analyzing trace with hash 733689957, now seen corresponding path program 1 times [2024-05-12 10:44:19,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:19,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086401301] [2024-05-12 10:44:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:19,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:19,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:19,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086401301] [2024-05-12 10:44:19,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086401301] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:19,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:19,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:19,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97573391] [2024-05-12 10:44:19,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:19,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:19,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:19,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:19,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:19,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:19,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 446 transitions, 5704 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:19,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:19,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:19,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:21,010 INFO L124 PetriNetUnfolderBase]: 4854/8132 cut-off events. [2024-05-12 10:44:21,010 INFO L125 PetriNetUnfolderBase]: For 415651/415994 co-relation queries the response was YES. [2024-05-12 10:44:21,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48927 conditions, 8132 events. 4854/8132 cut-off events. For 415651/415994 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 59388 event pairs, 914 based on Foata normal form. 344/8445 useless extension candidates. Maximal degree in co-relation 48765. Up to 6800 conditions per place. [2024-05-12 10:44:21,130 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 361 selfloop transitions, 129 changer transitions 0/504 dead transitions. [2024-05-12 10:44:21,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 504 transitions, 7471 flow [2024-05-12 10:44:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:44:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:44:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2024-05-12 10:44:21,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-05-12 10:44:21,131 INFO L175 Difference]: Start difference. First operand has 345 places, 446 transitions, 5704 flow. Second operand 9 states and 261 transitions. [2024-05-12 10:44:21,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 504 transitions, 7471 flow [2024-05-12 10:44:23,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 504 transitions, 7279 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-05-12 10:44:23,661 INFO L231 Difference]: Finished difference. Result has 352 places, 458 transitions, 5923 flow [2024-05-12 10:44:23,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5521, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5923, PETRI_PLACES=352, PETRI_TRANSITIONS=458} [2024-05-12 10:44:23,662 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 301 predicate places. [2024-05-12 10:44:23,662 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 458 transitions, 5923 flow [2024-05-12 10:44:23,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:23,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:23,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:23,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-05-12 10:44:23,662 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:23,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:23,662 INFO L85 PathProgramCache]: Analyzing trace with hash 733689771, now seen corresponding path program 2 times [2024-05-12 10:44:23,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:23,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495008200] [2024-05-12 10:44:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:23,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:23,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:23,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495008200] [2024-05-12 10:44:23,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495008200] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:23,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:23,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:23,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573606995] [2024-05-12 10:44:23,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:23,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:23,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:23,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:23,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:23,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:23,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 458 transitions, 5923 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:23,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:23,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:23,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:25,420 INFO L124 PetriNetUnfolderBase]: 4865/8349 cut-off events. [2024-05-12 10:44:25,420 INFO L125 PetriNetUnfolderBase]: For 416817/417163 co-relation queries the response was YES. [2024-05-12 10:44:25,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49585 conditions, 8349 events. 4865/8349 cut-off events. For 416817/417163 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 61833 event pairs, 988 based on Foata normal form. 347/8669 useless extension candidates. Maximal degree in co-relation 49420. Up to 7057 conditions per place. [2024-05-12 10:44:25,542 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 426 selfloop transitions, 64 changer transitions 0/504 dead transitions. [2024-05-12 10:44:25,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 504 transitions, 7035 flow [2024-05-12 10:44:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:44:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:44:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-05-12 10:44:25,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5981087470449172 [2024-05-12 10:44:25,543 INFO L175 Difference]: Start difference. First operand has 352 places, 458 transitions, 5923 flow. Second operand 9 states and 253 transitions. [2024-05-12 10:44:25,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 504 transitions, 7035 flow [2024-05-12 10:44:27,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 504 transitions, 6751 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 10:44:27,761 INFO L231 Difference]: Finished difference. Result has 356 places, 461 transitions, 5799 flow [2024-05-12 10:44:27,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5799, PETRI_PLACES=356, PETRI_TRANSITIONS=461} [2024-05-12 10:44:27,761 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 305 predicate places. [2024-05-12 10:44:27,761 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 461 transitions, 5799 flow [2024-05-12 10:44:27,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:27,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:27,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:27,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-05-12 10:44:27,761 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:27,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:27,762 INFO L85 PathProgramCache]: Analyzing trace with hash 910821291, now seen corresponding path program 3 times [2024-05-12 10:44:27,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:27,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283355682] [2024-05-12 10:44:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:27,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:28,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:28,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283355682] [2024-05-12 10:44:28,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283355682] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:28,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:28,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:44:28,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27993799] [2024-05-12 10:44:28,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:28,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:44:28,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:28,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:44:28,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:44:28,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:28,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 461 transitions, 5799 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:28,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:28,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:28,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:29,534 INFO L124 PetriNetUnfolderBase]: 4901/8408 cut-off events. [2024-05-12 10:44:29,534 INFO L125 PetriNetUnfolderBase]: For 428184/428530 co-relation queries the response was YES. [2024-05-12 10:44:29,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49729 conditions, 8408 events. 4901/8408 cut-off events. For 428184/428530 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 62262 event pairs, 986 based on Foata normal form. 347/8730 useless extension candidates. Maximal degree in co-relation 49563. Up to 7088 conditions per place. [2024-05-12 10:44:29,659 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 435 selfloop transitions, 74 changer transitions 0/523 dead transitions. [2024-05-12 10:44:29,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 523 transitions, 7233 flow [2024-05-12 10:44:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:44:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:44:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 324 transitions. [2024-05-12 10:44:29,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-05-12 10:44:29,660 INFO L175 Difference]: Start difference. First operand has 356 places, 461 transitions, 5799 flow. Second operand 12 states and 324 transitions. [2024-05-12 10:44:29,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 523 transitions, 7233 flow [2024-05-12 10:44:31,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 523 transitions, 7085 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 10:44:32,001 INFO L231 Difference]: Finished difference. Result has 361 places, 470 transitions, 5923 flow [2024-05-12 10:44:32,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5923, PETRI_PLACES=361, PETRI_TRANSITIONS=470} [2024-05-12 10:44:32,002 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 310 predicate places. [2024-05-12 10:44:32,002 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 470 transitions, 5923 flow [2024-05-12 10:44:32,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:32,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:32,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:32,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-05-12 10:44:32,002 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:32,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:32,003 INFO L85 PathProgramCache]: Analyzing trace with hash -897210207, now seen corresponding path program 2 times [2024-05-12 10:44:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:32,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518386251] [2024-05-12 10:44:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:32,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:32,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518386251] [2024-05-12 10:44:32,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518386251] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:32,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:32,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:32,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616458957] [2024-05-12 10:44:32,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:32,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:32,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:32,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:32,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:32,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:32,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 470 transitions, 5923 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:32,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:32,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:32,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:33,830 INFO L124 PetriNetUnfolderBase]: 4926/8450 cut-off events. [2024-05-12 10:44:33,831 INFO L125 PetriNetUnfolderBase]: For 440763/441106 co-relation queries the response was YES. [2024-05-12 10:44:33,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50180 conditions, 8450 events. 4926/8450 cut-off events. For 440763/441106 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 62732 event pairs, 1010 based on Foata normal form. 344/8765 useless extension candidates. Maximal degree in co-relation 50013. Up to 6884 conditions per place. [2024-05-12 10:44:33,954 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 377 selfloop transitions, 138 changer transitions 0/529 dead transitions. [2024-05-12 10:44:33,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 529 transitions, 7881 flow [2024-05-12 10:44:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:44:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:44:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 312 transitions. [2024-05-12 10:44:33,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6034816247582205 [2024-05-12 10:44:33,955 INFO L175 Difference]: Start difference. First operand has 361 places, 470 transitions, 5923 flow. Second operand 11 states and 312 transitions. [2024-05-12 10:44:33,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 529 transitions, 7881 flow [2024-05-12 10:44:36,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 529 transitions, 7712 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-05-12 10:44:36,360 INFO L231 Difference]: Finished difference. Result has 364 places, 476 transitions, 6100 flow [2024-05-12 10:44:36,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5754, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6100, PETRI_PLACES=364, PETRI_TRANSITIONS=476} [2024-05-12 10:44:36,361 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 313 predicate places. [2024-05-12 10:44:36,361 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 476 transitions, 6100 flow [2024-05-12 10:44:36,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:36,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:36,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:36,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-05-12 10:44:36,362 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:36,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash 911058627, now seen corresponding path program 3 times [2024-05-12 10:44:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:36,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444505937] [2024-05-12 10:44:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:36,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:36,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444505937] [2024-05-12 10:44:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444505937] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:36,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:36,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598467551] [2024-05-12 10:44:36,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:36,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:36,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:36,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:36,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 476 transitions, 6100 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:36,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:36,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:36,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:38,196 INFO L124 PetriNetUnfolderBase]: 4923/8451 cut-off events. [2024-05-12 10:44:38,196 INFO L125 PetriNetUnfolderBase]: For 445788/446124 co-relation queries the response was YES. [2024-05-12 10:44:38,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50429 conditions, 8451 events. 4923/8451 cut-off events. For 445788/446124 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 62684 event pairs, 1007 based on Foata normal form. 337/8759 useless extension candidates. Maximal degree in co-relation 50261. Up to 6881 conditions per place. [2024-05-12 10:44:38,327 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 367 selfloop transitions, 137 changer transitions 0/518 dead transitions. [2024-05-12 10:44:38,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 518 transitions, 7584 flow [2024-05-12 10:44:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:44:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:44:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-05-12 10:44:38,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.607565011820331 [2024-05-12 10:44:38,328 INFO L175 Difference]: Start difference. First operand has 364 places, 476 transitions, 6100 flow. Second operand 9 states and 257 transitions. [2024-05-12 10:44:38,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 518 transitions, 7584 flow [2024-05-12 10:44:40,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 518 transitions, 7282 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-05-12 10:44:40,893 INFO L231 Difference]: Finished difference. Result has 365 places, 476 transitions, 6078 flow [2024-05-12 10:44:40,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6078, PETRI_PLACES=365, PETRI_TRANSITIONS=476} [2024-05-12 10:44:40,893 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 314 predicate places. [2024-05-12 10:44:40,893 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 476 transitions, 6078 flow [2024-05-12 10:44:40,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:40,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:40,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:40,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-05-12 10:44:40,894 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:40,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1549207591, now seen corresponding path program 4 times [2024-05-12 10:44:40,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:40,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270201430] [2024-05-12 10:44:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:40,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:41,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:41,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270201430] [2024-05-12 10:44:41,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270201430] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:41,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:41,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:44:41,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565812969] [2024-05-12 10:44:41,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:41,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:44:41,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:44:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:44:41,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:41,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 476 transitions, 6078 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:41,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:41,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:41,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:42,649 INFO L124 PetriNetUnfolderBase]: 4948/8395 cut-off events. [2024-05-12 10:44:42,650 INFO L125 PetriNetUnfolderBase]: For 456086/456425 co-relation queries the response was YES. [2024-05-12 10:44:42,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50640 conditions, 8395 events. 4948/8395 cut-off events. For 456086/456425 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 61813 event pairs, 1038 based on Foata normal form. 340/8697 useless extension candidates. Maximal degree in co-relation 50471. Up to 7104 conditions per place. [2024-05-12 10:44:42,786 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 416 selfloop transitions, 93 changer transitions 0/523 dead transitions. [2024-05-12 10:44:42,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 523 transitions, 7624 flow [2024-05-12 10:44:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:44:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:44:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-05-12 10:44:42,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5981087470449172 [2024-05-12 10:44:42,787 INFO L175 Difference]: Start difference. First operand has 365 places, 476 transitions, 6078 flow. Second operand 9 states and 253 transitions. [2024-05-12 10:44:42,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 523 transitions, 7624 flow [2024-05-12 10:44:45,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 523 transitions, 7334 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 10:44:45,338 INFO L231 Difference]: Finished difference. Result has 366 places, 482 transitions, 6032 flow [2024-05-12 10:44:45,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5788, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6032, PETRI_PLACES=366, PETRI_TRANSITIONS=482} [2024-05-12 10:44:45,338 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 315 predicate places. [2024-05-12 10:44:45,338 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 482 transitions, 6032 flow [2024-05-12 10:44:45,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:45,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:45,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:45,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-05-12 10:44:45,339 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:45,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash -892656379, now seen corresponding path program 5 times [2024-05-12 10:44:45,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:45,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366978423] [2024-05-12 10:44:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:45,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:45,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:45,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366978423] [2024-05-12 10:44:45,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366978423] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:45,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:45,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:44:45,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055861698] [2024-05-12 10:44:45,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:45,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:44:45,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:45,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:44:45,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:44:45,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:45,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 482 transitions, 6032 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:45,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:45,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:45,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:47,082 INFO L124 PetriNetUnfolderBase]: 4973/8285 cut-off events. [2024-05-12 10:44:47,082 INFO L125 PetriNetUnfolderBase]: For 467957/468296 co-relation queries the response was YES. [2024-05-12 10:44:47,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50592 conditions, 8285 events. 4973/8285 cut-off events. For 467957/468296 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 60570 event pairs, 887 based on Foata normal form. 340/8600 useless extension candidates. Maximal degree in co-relation 50422. Up to 6887 conditions per place. [2024-05-12 10:44:47,205 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 374 selfloop transitions, 150 changer transitions 0/538 dead transitions. [2024-05-12 10:44:47,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 538 transitions, 7834 flow [2024-05-12 10:44:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:44:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:44:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2024-05-12 10:44:47,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5899419729206963 [2024-05-12 10:44:47,206 INFO L175 Difference]: Start difference. First operand has 366 places, 482 transitions, 6032 flow. Second operand 11 states and 305 transitions. [2024-05-12 10:44:47,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 538 transitions, 7834 flow [2024-05-12 10:44:49,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 538 transitions, 7595 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-05-12 10:44:49,101 INFO L231 Difference]: Finished difference. Result has 371 places, 488 transitions, 6163 flow [2024-05-12 10:44:49,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5817, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6163, PETRI_PLACES=371, PETRI_TRANSITIONS=488} [2024-05-12 10:44:49,102 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 320 predicate places. [2024-05-12 10:44:49,102 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 488 transitions, 6163 flow [2024-05-12 10:44:49,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:49,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:49,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:49,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-05-12 10:44:49,102 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:49,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1102433689, now seen corresponding path program 6 times [2024-05-12 10:44:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:49,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136814595] [2024-05-12 10:44:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:49,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:49,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:49,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136814595] [2024-05-12 10:44:49,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136814595] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:49,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:49,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:44:49,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934009313] [2024-05-12 10:44:49,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:49,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:44:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:44:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:44:49,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:49,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 488 transitions, 6163 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:49,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:49,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:49,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:50,892 INFO L124 PetriNetUnfolderBase]: 4970/8500 cut-off events. [2024-05-12 10:44:50,892 INFO L125 PetriNetUnfolderBase]: For 473680/474019 co-relation queries the response was YES. [2024-05-12 10:44:50,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51003 conditions, 8500 events. 4970/8500 cut-off events. For 473680/474019 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 63058 event pairs, 988 based on Foata normal form. 340/8815 useless extension candidates. Maximal degree in co-relation 50832. Up to 6884 conditions per place. [2024-05-12 10:44:51,025 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 382 selfloop transitions, 139 changer transitions 0/535 dead transitions. [2024-05-12 10:44:51,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 535 transitions, 8085 flow [2024-05-12 10:44:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:44:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:44:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-05-12 10:44:51,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2024-05-12 10:44:51,026 INFO L175 Difference]: Start difference. First operand has 371 places, 488 transitions, 6163 flow. Second operand 9 states and 263 transitions. [2024-05-12 10:44:51,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 535 transitions, 8085 flow [2024-05-12 10:44:53,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 535 transitions, 7819 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-05-12 10:44:53,407 INFO L231 Difference]: Finished difference. Result has 373 places, 488 transitions, 6181 flow [2024-05-12 10:44:53,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6181, PETRI_PLACES=373, PETRI_TRANSITIONS=488} [2024-05-12 10:44:53,407 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 322 predicate places. [2024-05-12 10:44:53,407 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 488 transitions, 6181 flow [2024-05-12 10:44:53,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:53,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:53,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:53,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-05-12 10:44:53,408 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:53,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:53,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1102313533, now seen corresponding path program 4 times [2024-05-12 10:44:53,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:53,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400284540] [2024-05-12 10:44:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:53,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:53,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:53,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400284540] [2024-05-12 10:44:53,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400284540] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:53,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:53,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:44:53,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182662051] [2024-05-12 10:44:53,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:53,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:44:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:44:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:44:53,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:53,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 488 transitions, 6181 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:53,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:53,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:53,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:55,207 INFO L124 PetriNetUnfolderBase]: 4992/8512 cut-off events. [2024-05-12 10:44:55,207 INFO L125 PetriNetUnfolderBase]: For 483855/484185 co-relation queries the response was YES. [2024-05-12 10:44:55,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51257 conditions, 8512 events. 4992/8512 cut-off events. For 483855/484185 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 63054 event pairs, 984 based on Foata normal form. 331/8811 useless extension candidates. Maximal degree in co-relation 51085. Up to 6965 conditions per place. [2024-05-12 10:44:55,348 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 381 selfloop transitions, 142 changer transitions 0/537 dead transitions. [2024-05-12 10:44:55,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 537 transitions, 7984 flow [2024-05-12 10:44:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:44:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:44:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2024-05-12 10:44:55,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6099290780141844 [2024-05-12 10:44:55,349 INFO L175 Difference]: Start difference. First operand has 373 places, 488 transitions, 6181 flow. Second operand 9 states and 258 transitions. [2024-05-12 10:44:55,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 537 transitions, 7984 flow [2024-05-12 10:44:57,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 537 transitions, 7690 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:44:57,823 INFO L231 Difference]: Finished difference. Result has 375 places, 494 transitions, 6254 flow [2024-05-12 10:44:57,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5893, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6254, PETRI_PLACES=375, PETRI_TRANSITIONS=494} [2024-05-12 10:44:57,824 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 324 predicate places. [2024-05-12 10:44:57,824 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 494 transitions, 6254 flow [2024-05-12 10:44:57,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:57,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:57,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:57,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-05-12 10:44:57,824 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:57,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:57,825 INFO L85 PathProgramCache]: Analyzing trace with hash 233773017, now seen corresponding path program 7 times [2024-05-12 10:44:57,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:57,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423174996] [2024-05-12 10:44:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:57,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:58,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:58,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423174996] [2024-05-12 10:44:58,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423174996] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:58,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:58,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:44:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082440338] [2024-05-12 10:44:58,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:58,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:44:58,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:44:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:44:58,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:44:58,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 494 transitions, 6254 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:58,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:58,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:44:58,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:59,645 INFO L124 PetriNetUnfolderBase]: 5003/8519 cut-off events. [2024-05-12 10:44:59,645 INFO L125 PetriNetUnfolderBase]: For 491216/491563 co-relation queries the response was YES. [2024-05-12 10:44:59,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51419 conditions, 8519 events. 5003/8519 cut-off events. For 491216/491563 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 63043 event pairs, 965 based on Foata normal form. 348/8840 useless extension candidates. Maximal degree in co-relation 51245. Up to 7239 conditions per place. [2024-05-12 10:44:59,777 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 453 selfloop transitions, 70 changer transitions 0/537 dead transitions. [2024-05-12 10:44:59,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 537 transitions, 7427 flow [2024-05-12 10:44:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:44:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:44:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-05-12 10:44:59,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5910165484633569 [2024-05-12 10:44:59,777 INFO L175 Difference]: Start difference. First operand has 375 places, 494 transitions, 6254 flow. Second operand 9 states and 250 transitions. [2024-05-12 10:44:59,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 537 transitions, 7427 flow [2024-05-12 10:45:02,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 537 transitions, 7125 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-05-12 10:45:02,219 INFO L231 Difference]: Finished difference. Result has 378 places, 497 transitions, 6127 flow [2024-05-12 10:45:02,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5952, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6127, PETRI_PLACES=378, PETRI_TRANSITIONS=497} [2024-05-12 10:45:02,220 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 327 predicate places. [2024-05-12 10:45:02,220 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 497 transitions, 6127 flow [2024-05-12 10:45:02,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:02,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:02,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:02,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-05-12 10:45:02,220 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:02,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:02,220 INFO L85 PathProgramCache]: Analyzing trace with hash -777186463, now seen corresponding path program 5 times [2024-05-12 10:45:02,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:02,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462666747] [2024-05-12 10:45:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:02,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:02,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:02,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462666747] [2024-05-12 10:45:02,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462666747] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:02,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:02,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:02,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736687266] [2024-05-12 10:45:02,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:02,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:02,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:02,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:02,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:02,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 497 transitions, 6127 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:02,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:02,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:02,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:04,184 INFO L124 PetriNetUnfolderBase]: 5039/8427 cut-off events. [2024-05-12 10:45:04,185 INFO L125 PetriNetUnfolderBase]: For 504919/505249 co-relation queries the response was YES. [2024-05-12 10:45:04,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51438 conditions, 8427 events. 5039/8427 cut-off events. For 504919/505249 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 61974 event pairs, 893 based on Foata normal form. 331/8726 useless extension candidates. Maximal degree in co-relation 51263. Up to 7015 conditions per place. [2024-05-12 10:45:04,295 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 381 selfloop transitions, 155 changer transitions 0/550 dead transitions. [2024-05-12 10:45:04,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 550 transitions, 8000 flow [2024-05-12 10:45:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:45:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:45:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 299 transitions. [2024-05-12 10:45:04,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783365570599613 [2024-05-12 10:45:04,296 INFO L175 Difference]: Start difference. First operand has 378 places, 497 transitions, 6127 flow. Second operand 11 states and 299 transitions. [2024-05-12 10:45:04,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 550 transitions, 8000 flow [2024-05-12 10:45:06,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 550 transitions, 7840 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 10:45:06,609 INFO L231 Difference]: Finished difference. Result has 382 places, 506 transitions, 6400 flow [2024-05-12 10:45:06,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5975, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6400, PETRI_PLACES=382, PETRI_TRANSITIONS=506} [2024-05-12 10:45:06,609 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 331 predicate places. [2024-05-12 10:45:06,609 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 506 transitions, 6400 flow [2024-05-12 10:45:06,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:06,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:06,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:06,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-05-12 10:45:06,610 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:06,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash -777365209, now seen corresponding path program 8 times [2024-05-12 10:45:06,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:06,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632784858] [2024-05-12 10:45:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:06,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:06,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:06,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632784858] [2024-05-12 10:45:06,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632784858] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:06,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:06,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:06,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362397822] [2024-05-12 10:45:06,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:06,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:06,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:06,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:06,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:06,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:06,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 506 transitions, 6400 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:06,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:06,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:06,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:08,529 INFO L124 PetriNetUnfolderBase]: 5064/8683 cut-off events. [2024-05-12 10:45:08,529 INFO L125 PetriNetUnfolderBase]: For 519166/519513 co-relation queries the response was YES. [2024-05-12 10:45:08,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52388 conditions, 8683 events. 5064/8683 cut-off events. For 519166/519513 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 64760 event pairs, 995 based on Foata normal form. 348/9004 useless extension candidates. Maximal degree in co-relation 52212. Up to 7288 conditions per place. [2024-05-12 10:45:08,670 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 450 selfloop transitions, 88 changer transitions 0/552 dead transitions. [2024-05-12 10:45:08,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 552 transitions, 7828 flow [2024-05-12 10:45:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:45:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:45:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-05-12 10:45:08,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787234042553191 [2024-05-12 10:45:08,672 INFO L175 Difference]: Start difference. First operand has 382 places, 506 transitions, 6400 flow. Second operand 10 states and 272 transitions. [2024-05-12 10:45:08,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 552 transitions, 7828 flow [2024-05-12 10:45:11,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 552 transitions, 7559 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 10:45:11,268 INFO L231 Difference]: Finished difference. Result has 387 places, 512 transitions, 6394 flow [2024-05-12 10:45:11,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6394, PETRI_PLACES=387, PETRI_TRANSITIONS=512} [2024-05-12 10:45:11,268 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 336 predicate places. [2024-05-12 10:45:11,269 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 512 transitions, 6394 flow [2024-05-12 10:45:11,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:11,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:11,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:11,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-05-12 10:45:11,269 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:11,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:11,269 INFO L85 PathProgramCache]: Analyzing trace with hash -777572413, now seen corresponding path program 6 times [2024-05-12 10:45:11,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:11,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987646007] [2024-05-12 10:45:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:11,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:11,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:11,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987646007] [2024-05-12 10:45:11,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987646007] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:11,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:11,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:45:11,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862875789] [2024-05-12 10:45:11,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:11,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:45:11,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:11,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:45:11,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:45:11,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:11,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 512 transitions, 6394 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:11,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:11,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:11,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:13,056 INFO L124 PetriNetUnfolderBase]: 5061/8442 cut-off events. [2024-05-12 10:45:13,056 INFO L125 PetriNetUnfolderBase]: For 522228/522573 co-relation queries the response was YES. [2024-05-12 10:45:13,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51940 conditions, 8442 events. 5061/8442 cut-off events. For 522228/522573 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 61969 event pairs, 898 based on Foata normal form. 346/8756 useless extension candidates. Maximal degree in co-relation 51762. Up to 7046 conditions per place. [2024-05-12 10:45:13,197 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 387 selfloop transitions, 152 changer transitions 0/553 dead transitions. [2024-05-12 10:45:13,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 553 transitions, 7976 flow [2024-05-12 10:45:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:45:13,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:45:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2024-05-12 10:45:13,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914893617021276 [2024-05-12 10:45:13,198 INFO L175 Difference]: Start difference. First operand has 387 places, 512 transitions, 6394 flow. Second operand 10 states and 278 transitions. [2024-05-12 10:45:13,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 553 transitions, 7976 flow [2024-05-12 10:45:16,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 553 transitions, 7811 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-05-12 10:45:16,033 INFO L231 Difference]: Finished difference. Result has 390 places, 512 transitions, 6539 flow [2024-05-12 10:45:16,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6229, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6539, PETRI_PLACES=390, PETRI_TRANSITIONS=512} [2024-05-12 10:45:16,033 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 339 predicate places. [2024-05-12 10:45:16,033 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 512 transitions, 6539 flow [2024-05-12 10:45:16,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:16,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:16,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:16,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-05-12 10:45:16,034 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:16,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:16,034 INFO L85 PathProgramCache]: Analyzing trace with hash -777572599, now seen corresponding path program 9 times [2024-05-12 10:45:16,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:16,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557074373] [2024-05-12 10:45:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:16,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:16,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:16,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557074373] [2024-05-12 10:45:16,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557074373] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:16,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:16,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:16,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260327617] [2024-05-12 10:45:16,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:16,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:16,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:16,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:16,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:16,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:16,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 512 transitions, 6539 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:16,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:16,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:16,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:17,997 INFO L124 PetriNetUnfolderBase]: 5058/8434 cut-off events. [2024-05-12 10:45:17,997 INFO L125 PetriNetUnfolderBase]: For 527410/527757 co-relation queries the response was YES. [2024-05-12 10:45:18,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52186 conditions, 8434 events. 5058/8434 cut-off events. For 527410/527757 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 61876 event pairs, 875 based on Foata normal form. 348/8754 useless extension candidates. Maximal degree in co-relation 52008. Up to 7281 conditions per place. [2024-05-12 10:45:18,117 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 455 selfloop transitions, 88 changer transitions 0/557 dead transitions. [2024-05-12 10:45:18,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 557 transitions, 7741 flow [2024-05-12 10:45:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:45:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:45:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 317 transitions. [2024-05-12 10:45:18,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5620567375886525 [2024-05-12 10:45:18,118 INFO L175 Difference]: Start difference. First operand has 390 places, 512 transitions, 6539 flow. Second operand 12 states and 317 transitions. [2024-05-12 10:45:18,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 557 transitions, 7741 flow [2024-05-12 10:45:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 557 transitions, 7433 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-05-12 10:45:21,125 INFO L231 Difference]: Finished difference. Result has 394 places, 512 transitions, 6413 flow [2024-05-12 10:45:21,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6413, PETRI_PLACES=394, PETRI_TRANSITIONS=512} [2024-05-12 10:45:21,126 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 343 predicate places. [2024-05-12 10:45:21,126 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 512 transitions, 6413 flow [2024-05-12 10:45:21,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:21,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:21,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:21,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-05-12 10:45:21,127 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:21,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:21,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1899662681, now seen corresponding path program 10 times [2024-05-12 10:45:21,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:21,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664216429] [2024-05-12 10:45:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:21,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:21,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:21,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664216429] [2024-05-12 10:45:21,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664216429] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:21,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:21,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:21,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210348439] [2024-05-12 10:45:21,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:21,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:21,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:21,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:21,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:21,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:21,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 512 transitions, 6413 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:21,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:21,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:21,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:23,105 INFO L124 PetriNetUnfolderBase]: 5094/8525 cut-off events. [2024-05-12 10:45:23,105 INFO L125 PetriNetUnfolderBase]: For 543375/543721 co-relation queries the response was YES. [2024-05-12 10:45:23,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52445 conditions, 8525 events. 5094/8525 cut-off events. For 543375/543721 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 62704 event pairs, 894 based on Foata normal form. 347/8837 useless extension candidates. Maximal degree in co-relation 52266. Up to 7401 conditions per place. [2024-05-12 10:45:23,262 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 490 selfloop transitions, 64 changer transitions 0/568 dead transitions. [2024-05-12 10:45:23,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 568 transitions, 8166 flow [2024-05-12 10:45:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:45:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:45:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 319 transitions. [2024-05-12 10:45:23,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656028368794326 [2024-05-12 10:45:23,263 INFO L175 Difference]: Start difference. First operand has 394 places, 512 transitions, 6413 flow. Second operand 12 states and 319 transitions. [2024-05-12 10:45:23,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 568 transitions, 8166 flow [2024-05-12 10:45:27,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 568 transitions, 7949 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-05-12 10:45:27,347 INFO L231 Difference]: Finished difference. Result has 396 places, 521 transitions, 6474 flow [2024-05-12 10:45:27,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6474, PETRI_PLACES=396, PETRI_TRANSITIONS=521} [2024-05-12 10:45:27,347 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 345 predicate places. [2024-05-12 10:45:27,347 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 521 transitions, 6474 flow [2024-05-12 10:45:27,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:27,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:27,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:27,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-05-12 10:45:27,348 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:27,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash -662276457, now seen corresponding path program 11 times [2024-05-12 10:45:27,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:27,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501004965] [2024-05-12 10:45:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:27,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:27,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501004965] [2024-05-12 10:45:27,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501004965] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:27,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:27,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:27,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113438585] [2024-05-12 10:45:27,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:27,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:27,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:27,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:27,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 521 transitions, 6474 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:27,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:27,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:27,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:29,259 INFO L124 PetriNetUnfolderBase]: 5105/8598 cut-off events. [2024-05-12 10:45:29,259 INFO L125 PetriNetUnfolderBase]: For 551993/552335 co-relation queries the response was YES. [2024-05-12 10:45:29,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52631 conditions, 8598 events. 5105/8598 cut-off events. For 551993/552335 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 63672 event pairs, 882 based on Foata normal form. 343/8920 useless extension candidates. Maximal degree in co-relation 52449. Up to 7105 conditions per place. [2024-05-12 10:45:29,397 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 416 selfloop transitions, 155 changer transitions 0/585 dead transitions. [2024-05-12 10:45:29,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 585 transitions, 8432 flow [2024-05-12 10:45:29,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:45:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:45:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 318 transitions. [2024-05-12 10:45:29,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150870406189555 [2024-05-12 10:45:29,398 INFO L175 Difference]: Start difference. First operand has 396 places, 521 transitions, 6474 flow. Second operand 11 states and 318 transitions. [2024-05-12 10:45:29,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 585 transitions, 8432 flow [2024-05-12 10:45:31,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 585 transitions, 8247 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-05-12 10:45:31,990 INFO L231 Difference]: Finished difference. Result has 399 places, 524 transitions, 6706 flow [2024-05-12 10:45:31,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6706, PETRI_PLACES=399, PETRI_TRANSITIONS=524} [2024-05-12 10:45:31,990 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 348 predicate places. [2024-05-12 10:45:31,990 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 524 transitions, 6706 flow [2024-05-12 10:45:31,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:31,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:31,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:31,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-05-12 10:45:31,991 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:31,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:31,991 INFO L85 PathProgramCache]: Analyzing trace with hash 289515681, now seen corresponding path program 7 times [2024-05-12 10:45:31,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:31,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722225929] [2024-05-12 10:45:31,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:31,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:32,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:32,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722225929] [2024-05-12 10:45:32,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722225929] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:32,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:32,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:32,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206495748] [2024-05-12 10:45:32,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:32,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:32,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:32,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 524 transitions, 6706 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:32,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:32,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:32,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:33,865 INFO L124 PetriNetUnfolderBase]: 5116/8783 cut-off events. [2024-05-12 10:45:33,865 INFO L125 PetriNetUnfolderBase]: For 563084/563429 co-relation queries the response was YES. [2024-05-12 10:45:33,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53449 conditions, 8783 events. 5116/8783 cut-off events. For 563084/563429 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 65728 event pairs, 1018 based on Foata normal form. 346/9096 useless extension candidates. Maximal degree in co-relation 53266. Up to 7111 conditions per place. [2024-05-12 10:45:34,011 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 397 selfloop transitions, 156 changer transitions 0/567 dead transitions. [2024-05-12 10:45:34,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 567 transitions, 8571 flow [2024-05-12 10:45:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:45:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:45:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-05-12 10:45:34,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-05-12 10:45:34,012 INFO L175 Difference]: Start difference. First operand has 399 places, 524 transitions, 6706 flow. Second operand 8 states and 235 transitions. [2024-05-12 10:45:34,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 567 transitions, 8571 flow [2024-05-12 10:45:36,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 567 transitions, 8205 flow, removed 19 selfloop flow, removed 12 redundant places. [2024-05-12 10:45:36,748 INFO L231 Difference]: Finished difference. Result has 395 places, 527 transitions, 6717 flow [2024-05-12 10:45:36,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6358, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6717, PETRI_PLACES=395, PETRI_TRANSITIONS=527} [2024-05-12 10:45:36,748 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 344 predicate places. [2024-05-12 10:45:36,748 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 527 transitions, 6717 flow [2024-05-12 10:45:36,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:36,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:36,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:36,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-05-12 10:45:36,748 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:36,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:36,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1523765795, now seen corresponding path program 8 times [2024-05-12 10:45:36,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:36,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140694575] [2024-05-12 10:45:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:36,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:37,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:37,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140694575] [2024-05-12 10:45:37,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140694575] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:37,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:37,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:45:37,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096507823] [2024-05-12 10:45:37,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:37,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:45:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:45:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:45:37,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:37,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 527 transitions, 6717 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:37,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:37,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:37,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:38,884 INFO L124 PetriNetUnfolderBase]: 5141/8609 cut-off events. [2024-05-12 10:45:38,885 INFO L125 PetriNetUnfolderBase]: For 549923/550269 co-relation queries the response was YES. [2024-05-12 10:45:38,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53314 conditions, 8609 events. 5141/8609 cut-off events. For 549923/550269 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 63530 event pairs, 916 based on Foata normal form. 347/8920 useless extension candidates. Maximal degree in co-relation 53132. Up to 7299 conditions per place. [2024-05-12 10:45:39,010 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 448 selfloop transitions, 116 changer transitions 0/578 dead transitions. [2024-05-12 10:45:39,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 578 transitions, 8445 flow [2024-05-12 10:45:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:45:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:45:39,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2024-05-12 10:45:39,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-05-12 10:45:39,011 INFO L175 Difference]: Start difference. First operand has 395 places, 527 transitions, 6717 flow. Second operand 12 states and 320 transitions. [2024-05-12 10:45:39,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 578 transitions, 8445 flow [2024-05-12 10:45:43,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 578 transitions, 8117 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-05-12 10:45:43,062 INFO L231 Difference]: Finished difference. Result has 400 places, 533 transitions, 6736 flow [2024-05-12 10:45:43,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6406, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6736, PETRI_PLACES=400, PETRI_TRANSITIONS=533} [2024-05-12 10:45:43,063 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 349 predicate places. [2024-05-12 10:45:43,063 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 533 transitions, 6736 flow [2024-05-12 10:45:43,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:43,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:43,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:43,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-05-12 10:45:43,063 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:43,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:43,064 INFO L85 PathProgramCache]: Analyzing trace with hash -545337661, now seen corresponding path program 9 times [2024-05-12 10:45:43,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:43,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481341174] [2024-05-12 10:45:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:43,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:43,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:43,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481341174] [2024-05-12 10:45:43,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481341174] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:43,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:43,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:43,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018890624] [2024-05-12 10:45:43,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:43,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:43,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:43,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:43,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 533 transitions, 6736 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:43,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:43,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:43,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:44,994 INFO L124 PetriNetUnfolderBase]: 5152/8764 cut-off events. [2024-05-12 10:45:44,994 INFO L125 PetriNetUnfolderBase]: For 541358/541694 co-relation queries the response was YES. [2024-05-12 10:45:45,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53317 conditions, 8764 events. 5152/8764 cut-off events. For 541358/541694 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 65169 event pairs, 960 based on Foata normal form. 337/9072 useless extension candidates. Maximal degree in co-relation 53136. Up to 7150 conditions per place. [2024-05-12 10:45:45,132 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 404 selfloop transitions, 165 changer transitions 0/583 dead transitions. [2024-05-12 10:45:45,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 583 transitions, 8442 flow [2024-05-12 10:45:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:45:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:45:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 307 transitions. [2024-05-12 10:45:45,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938104448742747 [2024-05-12 10:45:45,133 INFO L175 Difference]: Start difference. First operand has 400 places, 533 transitions, 6736 flow. Second operand 11 states and 307 transitions. [2024-05-12 10:45:45,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 583 transitions, 8442 flow [2024-05-12 10:45:48,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 583 transitions, 8174 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-05-12 10:45:48,475 INFO L231 Difference]: Finished difference. Result has 402 places, 536 transitions, 6848 flow [2024-05-12 10:45:48,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6485, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6848, PETRI_PLACES=402, PETRI_TRANSITIONS=536} [2024-05-12 10:45:48,476 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 351 predicate places. [2024-05-12 10:45:48,476 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 536 transitions, 6848 flow [2024-05-12 10:45:48,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:48,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:48,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:48,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-05-12 10:45:48,476 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:48,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1214394115, now seen corresponding path program 10 times [2024-05-12 10:45:48,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:48,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406493216] [2024-05-12 10:45:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:48,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:48,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:48,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406493216] [2024-05-12 10:45:48,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406493216] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:48,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:48,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:45:48,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597052330] [2024-05-12 10:45:48,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:48,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:45:48,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:45:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:45:48,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:48,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 536 transitions, 6848 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:48,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:48,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:48,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:50,411 INFO L124 PetriNetUnfolderBase]: 5163/8769 cut-off events. [2024-05-12 10:45:50,411 INFO L125 PetriNetUnfolderBase]: For 551204/551547 co-relation queries the response was YES. [2024-05-12 10:45:50,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53628 conditions, 8769 events. 5163/8769 cut-off events. For 551204/551547 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 65221 event pairs, 967 based on Foata normal form. 344/9082 useless extension candidates. Maximal degree in co-relation 53446. Up to 7162 conditions per place. [2024-05-12 10:45:50,552 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 405 selfloop transitions, 168 changer transitions 0/587 dead transitions. [2024-05-12 10:45:50,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 587 transitions, 8775 flow [2024-05-12 10:45:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:45:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:45:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-05-12 10:45:50,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:45:50,553 INFO L175 Difference]: Start difference. First operand has 402 places, 536 transitions, 6848 flow. Second operand 11 states and 308 transitions. [2024-05-12 10:45:50,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 587 transitions, 8775 flow [2024-05-12 10:45:53,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 587 transitions, 8515 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-05-12 10:45:53,515 INFO L231 Difference]: Finished difference. Result has 405 places, 539 transitions, 6977 flow [2024-05-12 10:45:53,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6591, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6977, PETRI_PLACES=405, PETRI_TRANSITIONS=539} [2024-05-12 10:45:53,515 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 354 predicate places. [2024-05-12 10:45:53,515 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 539 transitions, 6977 flow [2024-05-12 10:45:53,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:53,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:53,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:53,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-05-12 10:45:53,516 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:53,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash 735817059, now seen corresponding path program 12 times [2024-05-12 10:45:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:53,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150925212] [2024-05-12 10:45:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:53,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:53,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150925212] [2024-05-12 10:45:53,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150925212] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:53,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:53,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:53,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234984628] [2024-05-12 10:45:53,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:53,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:53,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:53,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:53,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:53,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 539 transitions, 6977 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:53,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:53,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:53,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:55,395 INFO L124 PetriNetUnfolderBase]: 5160/8885 cut-off events. [2024-05-12 10:45:55,395 INFO L125 PetriNetUnfolderBase]: For 554994/555341 co-relation queries the response was YES. [2024-05-12 10:45:55,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53788 conditions, 8885 events. 5160/8885 cut-off events. For 554994/555341 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 66692 event pairs, 983 based on Foata normal form. 348/9210 useless extension candidates. Maximal degree in co-relation 53605. Up to 7181 conditions per place. [2024-05-12 10:45:55,538 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 418 selfloop transitions, 155 changer transitions 0/587 dead transitions. [2024-05-12 10:45:55,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 587 transitions, 8659 flow [2024-05-12 10:45:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:45:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:45:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-05-12 10:45:55,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2024-05-12 10:45:55,538 INFO L175 Difference]: Start difference. First operand has 405 places, 539 transitions, 6977 flow. Second operand 9 states and 263 transitions. [2024-05-12 10:45:55,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 587 transitions, 8659 flow [2024-05-12 10:45:58,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 587 transitions, 8377 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-05-12 10:45:58,911 INFO L231 Difference]: Finished difference. Result has 407 places, 539 transitions, 7020 flow [2024-05-12 10:45:58,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6695, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7020, PETRI_PLACES=407, PETRI_TRANSITIONS=539} [2024-05-12 10:45:58,911 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 356 predicate places. [2024-05-12 10:45:58,912 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 539 transitions, 7020 flow [2024-05-12 10:45:58,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:58,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:58,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:58,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-05-12 10:45:58,912 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:58,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1751666945, now seen corresponding path program 11 times [2024-05-12 10:45:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:58,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102355003] [2024-05-12 10:45:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:59,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:59,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102355003] [2024-05-12 10:45:59,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102355003] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:59,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:59,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:59,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820729646] [2024-05-12 10:45:59,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:59,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:59,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:59,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:59,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:45:59,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 539 transitions, 7020 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:59,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:59,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:45:59,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:00,879 INFO L124 PetriNetUnfolderBase]: 5185/8697 cut-off events. [2024-05-12 10:46:00,880 INFO L125 PetriNetUnfolderBase]: For 571041/571371 co-relation queries the response was YES. [2024-05-12 10:46:00,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53992 conditions, 8697 events. 5185/8697 cut-off events. For 571041/571371 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 64352 event pairs, 910 based on Foata normal form. 331/8995 useless extension candidates. Maximal degree in co-relation 53808. Up to 7185 conditions per place. [2024-05-12 10:46:01,010 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 389 selfloop transitions, 181 changer transitions 0/584 dead transitions. [2024-05-12 10:46:01,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 584 transitions, 8977 flow [2024-05-12 10:46:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:46:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:46:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-05-12 10:46:01,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5981087470449172 [2024-05-12 10:46:01,011 INFO L175 Difference]: Start difference. First operand has 407 places, 539 transitions, 7020 flow. Second operand 9 states and 253 transitions. [2024-05-12 10:46:01,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 584 transitions, 8977 flow [2024-05-12 10:46:04,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 584 transitions, 8647 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-05-12 10:46:04,761 INFO L231 Difference]: Finished difference. Result has 407 places, 545 transitions, 7169 flow [2024-05-12 10:46:04,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6702, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7169, PETRI_PLACES=407, PETRI_TRANSITIONS=545} [2024-05-12 10:46:04,762 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 356 predicate places. [2024-05-12 10:46:04,762 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 545 transitions, 7169 flow [2024-05-12 10:46:04,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:04,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:04,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:04,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-05-12 10:46:04,763 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:04,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1528527395, now seen corresponding path program 12 times [2024-05-12 10:46:04,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:04,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125791402] [2024-05-12 10:46:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:04,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:05,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:05,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125791402] [2024-05-12 10:46:05,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125791402] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:05,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:05,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:46:05,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164100492] [2024-05-12 10:46:05,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:05,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:46:05,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:05,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:46:05,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:46:05,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:46:05,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 545 transitions, 7169 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:05,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:05,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:46:05,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:06,726 INFO L124 PetriNetUnfolderBase]: 5182/8681 cut-off events. [2024-05-12 10:46:06,726 INFO L125 PetriNetUnfolderBase]: For 557199/557542 co-relation queries the response was YES. [2024-05-12 10:46:06,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53862 conditions, 8681 events. 5182/8681 cut-off events. For 557199/557542 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 64216 event pairs, 918 based on Foata normal form. 344/8988 useless extension candidates. Maximal degree in co-relation 53678. Up to 7373 conditions per place. [2024-05-12 10:46:06,877 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 463 selfloop transitions, 110 changer transitions 0/587 dead transitions. [2024-05-12 10:46:06,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 587 transitions, 8627 flow [2024-05-12 10:46:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:46:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:46:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 298 transitions. [2024-05-12 10:46:06,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764023210831721 [2024-05-12 10:46:06,878 INFO L175 Difference]: Start difference. First operand has 407 places, 545 transitions, 7169 flow. Second operand 11 states and 298 transitions. [2024-05-12 10:46:06,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 587 transitions, 8627 flow [2024-05-12 10:46:10,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 587 transitions, 8309 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-05-12 10:46:10,791 INFO L231 Difference]: Finished difference. Result has 412 places, 545 transitions, 7079 flow [2024-05-12 10:46:10,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6853, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7079, PETRI_PLACES=412, PETRI_TRANSITIONS=545} [2024-05-12 10:46:10,791 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 361 predicate places. [2024-05-12 10:46:10,792 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 545 transitions, 7079 flow [2024-05-12 10:46:10,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:10,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:10,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:10,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-05-12 10:46:10,792 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:10,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash 645031941, now seen corresponding path program 1 times [2024-05-12 10:46:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:10,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121757573] [2024-05-12 10:46:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:10,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:11,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:11,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121757573] [2024-05-12 10:46:11,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121757573] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:11,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:11,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:11,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531586504] [2024-05-12 10:46:11,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:11,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:11,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:11,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:46:11,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 545 transitions, 7079 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:11,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:11,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:46:11,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:12,822 INFO L124 PetriNetUnfolderBase]: 5451/9112 cut-off events. [2024-05-12 10:46:12,822 INFO L125 PetriNetUnfolderBase]: For 696909/697245 co-relation queries the response was YES. [2024-05-12 10:46:12,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57494 conditions, 9112 events. 5451/9112 cut-off events. For 696909/697245 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 67768 event pairs, 800 based on Foata normal form. 348/9426 useless extension candidates. Maximal degree in co-relation 57310. Up to 7047 conditions per place. [2024-05-12 10:46:12,969 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 409 selfloop transitions, 183 changer transitions 0/606 dead transitions. [2024-05-12 10:46:12,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 606 transitions, 9161 flow [2024-05-12 10:46:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:46:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:46:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2024-05-12 10:46:12,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-05-12 10:46:12,970 INFO L175 Difference]: Start difference. First operand has 412 places, 545 transitions, 7079 flow. Second operand 9 states and 267 transitions. [2024-05-12 10:46:12,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 606 transitions, 9161 flow [2024-05-12 10:46:17,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 606 transitions, 8837 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-05-12 10:46:17,343 INFO L231 Difference]: Finished difference. Result has 410 places, 552 transitions, 7252 flow [2024-05-12 10:46:17,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7252, PETRI_PLACES=410, PETRI_TRANSITIONS=552} [2024-05-12 10:46:17,344 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 359 predicate places. [2024-05-12 10:46:17,344 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 552 transitions, 7252 flow [2024-05-12 10:46:17,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:17,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:17,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:17,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-05-12 10:46:17,344 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:17,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash 652450551, now seen corresponding path program 2 times [2024-05-12 10:46:17,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:17,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780504449] [2024-05-12 10:46:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:17,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:17,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:17,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780504449] [2024-05-12 10:46:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780504449] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:17,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:17,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:46:17,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551210939] [2024-05-12 10:46:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:17,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:46:17,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:46:17,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:46:17,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:46:17,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 552 transitions, 7252 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:17,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:17,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:46:17,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:19,688 INFO L124 PetriNetUnfolderBase]: 5579/9339 cut-off events. [2024-05-12 10:46:19,688 INFO L125 PetriNetUnfolderBase]: For 736838/737181 co-relation queries the response was YES. [2024-05-12 10:46:19,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59515 conditions, 9339 events. 5579/9339 cut-off events. For 736838/737181 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 69802 event pairs, 996 based on Foata normal form. 359/9665 useless extension candidates. Maximal degree in co-relation 59329. Up to 7633 conditions per place. [2024-05-12 10:46:19,821 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 411 selfloop transitions, 175 changer transitions 0/600 dead transitions. [2024-05-12 10:46:19,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 600 transitions, 9028 flow [2024-05-12 10:46:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:46:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:46:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-05-12 10:46:19,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146572104018913 [2024-05-12 10:46:19,822 INFO L175 Difference]: Start difference. First operand has 410 places, 552 transitions, 7252 flow. Second operand 9 states and 260 transitions. [2024-05-12 10:46:19,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 600 transitions, 9028 flow [2024-05-12 10:46:24,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 600 transitions, 8768 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-05-12 10:46:24,170 INFO L231 Difference]: Finished difference. Result has 415 places, 554 transitions, 7404 flow [2024-05-12 10:46:24,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6996, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7404, PETRI_PLACES=415, PETRI_TRANSITIONS=554} [2024-05-12 10:46:24,171 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 364 predicate places. [2024-05-12 10:46:24,171 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 554 transitions, 7404 flow [2024-05-12 10:46:24,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:24,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:24,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:24,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-05-12 10:46:24,172 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:24,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash 910729221, now seen corresponding path program 3 times [2024-05-12 10:46:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939895271] [2024-05-12 10:46:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:24,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:24,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:24,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939895271] [2024-05-12 10:46:24,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939895271] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:24,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:24,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:46:24,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029169195] [2024-05-12 10:46:24,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:24,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:46:24,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:24,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:46:24,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:46:24,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:46:24,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 554 transitions, 7404 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:24,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:24,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:46:24,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:26,618 INFO L124 PetriNetUnfolderBase]: 5707/9512 cut-off events. [2024-05-12 10:46:26,618 INFO L125 PetriNetUnfolderBase]: For 728888/729224 co-relation queries the response was YES. [2024-05-12 10:46:26,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61076 conditions, 9512 events. 5707/9512 cut-off events. For 728888/729224 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 71126 event pairs, 972 based on Foata normal form. 348/9824 useless extension candidates. Maximal degree in co-relation 60888. Up to 7689 conditions per place. [2024-05-12 10:46:26,760 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 415 selfloop transitions, 179 changer transitions 0/608 dead transitions. [2024-05-12 10:46:26,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 608 transitions, 9242 flow [2024-05-12 10:46:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:46:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:46:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-05-12 10:46:26,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2024-05-12 10:46:26,761 INFO L175 Difference]: Start difference. First operand has 415 places, 554 transitions, 7404 flow. Second operand 9 states and 263 transitions. [2024-05-12 10:46:26,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 608 transitions, 9242 flow [2024-05-12 10:46:30,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 608 transitions, 8870 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-05-12 10:46:30,899 INFO L231 Difference]: Finished difference. Result has 418 places, 559 transitions, 7491 flow [2024-05-12 10:46:30,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7032, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7491, PETRI_PLACES=418, PETRI_TRANSITIONS=559} [2024-05-12 10:46:30,899 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 367 predicate places. [2024-05-12 10:46:30,899 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 559 transitions, 7491 flow [2024-05-12 10:46:30,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:30,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:30,900 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, 1] [2024-05-12 10:46:30,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-05-12 10:46:30,900 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:30,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash -116354161, now seen corresponding path program 4 times [2024-05-12 10:46:30,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:30,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318094163] [2024-05-12 10:46:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:30,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:31,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:31,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318094163] [2024-05-12 10:46:31,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318094163] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:31,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:31,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:31,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405520405] [2024-05-12 10:46:31,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:31,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:31,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:31,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:31,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:31,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:46:31,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 559 transitions, 7491 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:31,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:31,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:46:31,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:33,504 INFO L124 PetriNetUnfolderBase]: 5835/9719 cut-off events. [2024-05-12 10:46:33,504 INFO L125 PetriNetUnfolderBase]: For 767932/768268 co-relation queries the response was YES. [2024-05-12 10:46:33,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62519 conditions, 9719 events. 5835/9719 cut-off events. For 767932/768268 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 72745 event pairs, 1014 based on Foata normal form. 352/10037 useless extension candidates. Maximal degree in co-relation 62329. Up to 8017 conditions per place. [2024-05-12 10:46:33,656 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 422 selfloop transitions, 178 changer transitions 0/614 dead transitions. [2024-05-12 10:46:33,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 614 transitions, 9323 flow [2024-05-12 10:46:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:46:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:46:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 330 transitions. [2024-05-12 10:46:33,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-05-12 10:46:33,657 INFO L175 Difference]: Start difference. First operand has 418 places, 559 transitions, 7491 flow. Second operand 12 states and 330 transitions. [2024-05-12 10:46:33,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 614 transitions, 9323 flow [2024-05-12 10:46:37,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 614 transitions, 8938 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-05-12 10:46:37,822 INFO L231 Difference]: Finished difference. Result has 424 places, 561 transitions, 7528 flow [2024-05-12 10:46:37,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7106, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7528, PETRI_PLACES=424, PETRI_TRANSITIONS=561} [2024-05-12 10:46:37,823 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 373 predicate places. [2024-05-12 10:46:37,823 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 561 transitions, 7528 flow [2024-05-12 10:46:37,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:37,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:37,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:37,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-05-12 10:46:37,824 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:37,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1941594975, now seen corresponding path program 5 times [2024-05-12 10:46:37,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:37,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638043076] [2024-05-12 10:46:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:38,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:38,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638043076] [2024-05-12 10:46:38,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638043076] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:38,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:38,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:46:38,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101855988] [2024-05-12 10:46:38,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:38,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:46:38,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:38,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:46:38,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:46:38,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:46:38,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 561 transitions, 7528 flow. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:38,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:38,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:46:38,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:40,431 INFO L124 PetriNetUnfolderBase]: 5963/10222 cut-off events. [2024-05-12 10:46:40,432 INFO L125 PetriNetUnfolderBase]: For 786461/786797 co-relation queries the response was YES. [2024-05-12 10:46:40,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64109 conditions, 10222 events. 5963/10222 cut-off events. For 786461/786797 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 78289 event pairs, 1180 based on Foata normal form. 352/10540 useless extension candidates. Maximal degree in co-relation 63918. Up to 8209 conditions per place. [2024-05-12 10:46:40,579 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 424 selfloop transitions, 176 changer transitions 0/614 dead transitions. [2024-05-12 10:46:40,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 614 transitions, 9364 flow [2024-05-12 10:46:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:46:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:46:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 310 transitions. [2024-05-12 10:46:40,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5996131528046421 [2024-05-12 10:46:40,581 INFO L175 Difference]: Start difference. First operand has 424 places, 561 transitions, 7528 flow. Second operand 11 states and 310 transitions. [2024-05-12 10:46:40,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 614 transitions, 9364 flow [2024-05-12 10:46:44,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 614 transitions, 8978 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-05-12 10:46:44,910 INFO L231 Difference]: Finished difference. Result has 425 places, 563 transitions, 7564 flow [2024-05-12 10:46:44,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7142, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7564, PETRI_PLACES=425, PETRI_TRANSITIONS=563} [2024-05-12 10:46:44,910 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 374 predicate places. [2024-05-12 10:46:44,910 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 563 transitions, 7564 flow [2024-05-12 10:46:44,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 10 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:44,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:44,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:44,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-05-12 10:46:44,911 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:44,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1941268545, now seen corresponding path program 6 times [2024-05-12 10:46:44,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:44,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078059040] [2024-05-12 10:46:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:44,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:45,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078059040] [2024-05-12 10:46:45,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078059040] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:45,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:45,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:45,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035018403] [2024-05-12 10:46:45,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:45,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:45,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:45,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:45,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:45,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:46:45,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 563 transitions, 7564 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:45,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:45,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:46:45,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:47,598 INFO L124 PetriNetUnfolderBase]: 6091/10160 cut-off events. [2024-05-12 10:46:47,598 INFO L125 PetriNetUnfolderBase]: For 776615/776951 co-relation queries the response was YES. [2024-05-12 10:46:47,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64908 conditions, 10160 events. 6091/10160 cut-off events. For 776615/776951 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 76686 event pairs, 1046 based on Foata normal form. 348/10471 useless extension candidates. Maximal degree in co-relation 64716. Up to 8121 conditions per place. [2024-05-12 10:46:47,754 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 426 selfloop transitions, 182 changer transitions 0/622 dead transitions. [2024-05-12 10:46:47,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 622 transitions, 9472 flow [2024-05-12 10:46:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:46:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:46:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 312 transitions. [2024-05-12 10:46:47,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6034816247582205 [2024-05-12 10:46:47,755 INFO L175 Difference]: Start difference. First operand has 425 places, 563 transitions, 7564 flow. Second operand 11 states and 312 transitions. [2024-05-12 10:46:47,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 622 transitions, 9472 flow [2024-05-12 10:46:52,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 622 transitions, 9086 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-05-12 10:46:52,059 INFO L231 Difference]: Finished difference. Result has 428 places, 568 transitions, 7665 flow [2024-05-12 10:46:52,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7178, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7665, PETRI_PLACES=428, PETRI_TRANSITIONS=568} [2024-05-12 10:46:52,059 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 377 predicate places. [2024-05-12 10:46:52,059 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 568 transitions, 7665 flow [2024-05-12 10:46:52,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:52,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:52,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:52,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-05-12 10:46:52,060 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:52,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1982074657, now seen corresponding path program 1 times [2024-05-12 10:46:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:52,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899366] [2024-05-12 10:46:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:52,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:52,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:52,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899366] [2024-05-12 10:46:52,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899366] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:52,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:52,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:52,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404874094] [2024-05-12 10:46:52,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:52,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:52,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:52,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:46:52,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 568 transitions, 7665 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:52,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:52,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:46:52,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:54,765 INFO L124 PetriNetUnfolderBase]: 6183/10332 cut-off events. [2024-05-12 10:46:54,766 INFO L125 PetriNetUnfolderBase]: For 790266/790602 co-relation queries the response was YES. [2024-05-12 10:46:54,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65864 conditions, 10332 events. 6183/10332 cut-off events. For 790266/790602 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 78212 event pairs, 1081 based on Foata normal form. 348/10640 useless extension candidates. Maximal degree in co-relation 65670. Up to 8129 conditions per place. [2024-05-12 10:46:54,937 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 425 selfloop transitions, 187 changer transitions 0/626 dead transitions. [2024-05-12 10:46:54,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 626 transitions, 9545 flow [2024-05-12 10:46:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:46:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:46:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 332 transitions. [2024-05-12 10:46:54,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886524822695035 [2024-05-12 10:46:54,938 INFO L175 Difference]: Start difference. First operand has 428 places, 568 transitions, 7665 flow. Second operand 12 states and 332 transitions. [2024-05-12 10:46:54,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 626 transitions, 9545 flow [2024-05-12 10:46:59,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 626 transitions, 9140 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-05-12 10:46:59,737 INFO L231 Difference]: Finished difference. Result has 432 places, 570 transitions, 7695 flow [2024-05-12 10:46:59,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7260, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7695, PETRI_PLACES=432, PETRI_TRANSITIONS=570} [2024-05-12 10:46:59,738 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 381 predicate places. [2024-05-12 10:46:59,738 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 570 transitions, 7695 flow [2024-05-12 10:46:59,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:59,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:59,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:59,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-05-12 10:46:59,738 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:59,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1891557823, now seen corresponding path program 1 times [2024-05-12 10:46:59,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:59,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881298882] [2024-05-12 10:46:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:59,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:00,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:00,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881298882] [2024-05-12 10:47:00,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881298882] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:00,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:00,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:47:00,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310399527] [2024-05-12 10:47:00,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:00,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:47:00,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:47:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:47:00,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:47:00,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 570 transitions, 7695 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:00,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:00,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:47:00,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:02,383 INFO L124 PetriNetUnfolderBase]: 6196/10456 cut-off events. [2024-05-12 10:47:02,384 INFO L125 PetriNetUnfolderBase]: For 741813/742151 co-relation queries the response was YES. [2024-05-12 10:47:02,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65980 conditions, 10456 events. 6196/10456 cut-off events. For 741813/742151 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 79533 event pairs, 1330 based on Foata normal form. 340/10730 useless extension candidates. Maximal degree in co-relation 65785. Up to 9051 conditions per place. [2024-05-12 10:47:02,538 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 516 selfloop transitions, 67 changer transitions 0/597 dead transitions. [2024-05-12 10:47:02,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 597 transitions, 8989 flow [2024-05-12 10:47:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:47:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:47:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:47:02,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-05-12 10:47:02,539 INFO L175 Difference]: Start difference. First operand has 432 places, 570 transitions, 7695 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:47:02,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 597 transitions, 8989 flow [2024-05-12 10:47:07,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 597 transitions, 8578 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-05-12 10:47:07,574 INFO L231 Difference]: Finished difference. Result has 430 places, 572 transitions, 7497 flow [2024-05-12 10:47:07,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7284, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7497, PETRI_PLACES=430, PETRI_TRANSITIONS=572} [2024-05-12 10:47:07,574 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 379 predicate places. [2024-05-12 10:47:07,574 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 572 transitions, 7497 flow [2024-05-12 10:47:07,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:07,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:07,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:07,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-05-12 10:47:07,575 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:07,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1969125027, now seen corresponding path program 2 times [2024-05-12 10:47:07,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:07,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579125903] [2024-05-12 10:47:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:07,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:07,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:07,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579125903] [2024-05-12 10:47:07,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579125903] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:07,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:07,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:47:07,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221361213] [2024-05-12 10:47:07,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:07,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:47:07,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:47:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:47:07,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:47:07,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 572 transitions, 7497 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:07,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:07,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:47:07,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:10,248 INFO L124 PetriNetUnfolderBase]: 6209/10463 cut-off events. [2024-05-12 10:47:10,249 INFO L125 PetriNetUnfolderBase]: For 750263/750602 co-relation queries the response was YES. [2024-05-12 10:47:10,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65144 conditions, 10463 events. 6209/10463 cut-off events. For 750263/750602 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 79588 event pairs, 1321 based on Foata normal form. 341/10738 useless extension candidates. Maximal degree in co-relation 64948. Up to 9037 conditions per place. [2024-05-12 10:47:10,414 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 516 selfloop transitions, 72 changer transitions 0/602 dead transitions. [2024-05-12 10:47:10,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 602 transitions, 8811 flow [2024-05-12 10:47:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:47:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:47:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 10:47:10,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2024-05-12 10:47:10,415 INFO L175 Difference]: Start difference. First operand has 430 places, 572 transitions, 7497 flow. Second operand 9 states and 237 transitions. [2024-05-12 10:47:10,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 602 transitions, 8811 flow [2024-05-12 10:47:15,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 602 transitions, 8616 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-05-12 10:47:15,761 INFO L231 Difference]: Finished difference. Result has 433 places, 574 transitions, 7529 flow [2024-05-12 10:47:15,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7302, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7529, PETRI_PLACES=433, PETRI_TRANSITIONS=574} [2024-05-12 10:47:15,761 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 382 predicate places. [2024-05-12 10:47:15,761 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 574 transitions, 7529 flow [2024-05-12 10:47:15,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:15,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:15,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:15,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-05-12 10:47:15,762 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:15,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:15,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1947771427, now seen corresponding path program 13 times [2024-05-12 10:47:15,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:15,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817582286] [2024-05-12 10:47:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:15,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:16,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:16,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817582286] [2024-05-12 10:47:16,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817582286] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:16,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:16,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:16,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865546150] [2024-05-12 10:47:16,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:16,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:16,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:16,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:47:16,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 574 transitions, 7529 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:16,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:16,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:47:16,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:18,222 INFO L124 PetriNetUnfolderBase]: 6248/10360 cut-off events. [2024-05-12 10:47:18,223 INFO L125 PetriNetUnfolderBase]: For 768399/768744 co-relation queries the response was YES. [2024-05-12 10:47:18,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65581 conditions, 10360 events. 6248/10360 cut-off events. For 768399/768744 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 78187 event pairs, 1103 based on Foata normal form. 342/10652 useless extension candidates. Maximal degree in co-relation 65384. Up to 8717 conditions per place. [2024-05-12 10:47:18,553 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 438 selfloop transitions, 174 changer transitions 0/626 dead transitions. [2024-05-12 10:47:18,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 626 transitions, 9641 flow [2024-05-12 10:47:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:47:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:47:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-05-12 10:47:18,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303191489361702 [2024-05-12 10:47:18,555 INFO L175 Difference]: Start difference. First operand has 433 places, 574 transitions, 7529 flow. Second operand 8 states and 237 transitions. [2024-05-12 10:47:18,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 626 transitions, 9641 flow [2024-05-12 10:47:24,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 626 transitions, 9432 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-05-12 10:47:24,262 INFO L231 Difference]: Finished difference. Result has 434 places, 583 transitions, 7780 flow [2024-05-12 10:47:24,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7320, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7780, PETRI_PLACES=434, PETRI_TRANSITIONS=583} [2024-05-12 10:47:24,262 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 383 predicate places. [2024-05-12 10:47:24,263 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 583 transitions, 7780 flow [2024-05-12 10:47:24,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:24,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:24,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:24,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-05-12 10:47:24,263 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:24,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:24,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1947891397, now seen corresponding path program 14 times [2024-05-12 10:47:24,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:24,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309202599] [2024-05-12 10:47:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:24,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:24,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309202599] [2024-05-12 10:47:24,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309202599] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:24,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:24,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:47:24,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273106739] [2024-05-12 10:47:24,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:47:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:47:24,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:47:24,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:47:24,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 583 transitions, 7780 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:24,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:24,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:47:24,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:26,939 INFO L124 PetriNetUnfolderBase]: 6245/10379 cut-off events. [2024-05-12 10:47:26,939 INFO L125 PetriNetUnfolderBase]: For 774866/775216 co-relation queries the response was YES. [2024-05-12 10:47:27,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65878 conditions, 10379 events. 6245/10379 cut-off events. For 774866/775216 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 78521 event pairs, 1095 based on Foata normal form. 351/10680 useless extension candidates. Maximal degree in co-relation 65680. Up to 9067 conditions per place. [2024-05-12 10:47:27,099 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 530 selfloop transitions, 76 changer transitions 0/620 dead transitions. [2024-05-12 10:47:27,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 620 transitions, 9088 flow [2024-05-12 10:47:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:47:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:47:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-05-12 10:47:27,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037234042553191 [2024-05-12 10:47:27,100 INFO L175 Difference]: Start difference. First operand has 434 places, 583 transitions, 7780 flow. Second operand 8 states and 227 transitions. [2024-05-12 10:47:27,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 620 transitions, 9088 flow [2024-05-12 10:47:32,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 620 transitions, 8706 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-05-12 10:47:32,576 INFO L231 Difference]: Finished difference. Result has 437 places, 583 transitions, 7556 flow [2024-05-12 10:47:32,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7398, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7556, PETRI_PLACES=437, PETRI_TRANSITIONS=583} [2024-05-12 10:47:32,576 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 386 predicate places. [2024-05-12 10:47:32,576 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 583 transitions, 7556 flow [2024-05-12 10:47:32,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:32,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:32,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:32,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-05-12 10:47:32,577 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:32,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:32,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1824363899, now seen corresponding path program 15 times [2024-05-12 10:47:32,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:32,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475167439] [2024-05-12 10:47:32,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:32,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:32,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:32,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475167439] [2024-05-12 10:47:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475167439] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:32,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:32,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:47:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457512210] [2024-05-12 10:47:32,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:32,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:47:32,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:47:32,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:47:32,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:47:32,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 583 transitions, 7556 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:32,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:32,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:47:32,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:35,271 INFO L124 PetriNetUnfolderBase]: 6284/10839 cut-off events. [2024-05-12 10:47:35,271 INFO L125 PetriNetUnfolderBase]: For 800724/801072 co-relation queries the response was YES. [2024-05-12 10:47:35,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66439 conditions, 10839 events. 6284/10839 cut-off events. For 800724/801072 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 84162 event pairs, 1294 based on Foata normal form. 349/11139 useless extension candidates. Maximal degree in co-relation 66240. Up to 8756 conditions per place. [2024-05-12 10:47:35,446 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 434 selfloop transitions, 188 changer transitions 0/636 dead transitions. [2024-05-12 10:47:35,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 636 transitions, 9468 flow [2024-05-12 10:47:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:47:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:47:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-05-12 10:47:35,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028368794326241 [2024-05-12 10:47:35,447 INFO L175 Difference]: Start difference. First operand has 437 places, 583 transitions, 7556 flow. Second operand 9 states and 255 transitions. [2024-05-12 10:47:35,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 636 transitions, 9468 flow [2024-05-12 10:47:40,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 636 transitions, 9304 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:47:40,709 INFO L231 Difference]: Finished difference. Result has 438 places, 592 transitions, 7874 flow [2024-05-12 10:47:40,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7392, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7874, PETRI_PLACES=438, PETRI_TRANSITIONS=592} [2024-05-12 10:47:40,710 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 387 predicate places. [2024-05-12 10:47:40,710 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 592 transitions, 7874 flow [2024-05-12 10:47:40,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:40,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:40,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:40,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-05-12 10:47:40,710 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:40,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1813888379, now seen corresponding path program 16 times [2024-05-12 10:47:40,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:40,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596003144] [2024-05-12 10:47:40,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:40,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:40,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:40,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596003144] [2024-05-12 10:47:40,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596003144] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:40,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:40,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:40,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647647550] [2024-05-12 10:47:40,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:40,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:40,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:40,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:40,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:41,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:47:41,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 592 transitions, 7874 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:41,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:41,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:47:41,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:43,476 INFO L124 PetriNetUnfolderBase]: 6295/10492 cut-off events. [2024-05-12 10:47:43,477 INFO L125 PetriNetUnfolderBase]: For 813228/813576 co-relation queries the response was YES. [2024-05-12 10:47:43,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66784 conditions, 10492 events. 6295/10492 cut-off events. For 813228/813576 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 79622 event pairs, 1118 based on Foata normal form. 349/10792 useless extension candidates. Maximal degree in co-relation 66584. Up to 8768 conditions per place. [2024-05-12 10:47:43,638 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 438 selfloop transitions, 192 changer transitions 0/644 dead transitions. [2024-05-12 10:47:43,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 644 transitions, 9758 flow [2024-05-12 10:47:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:47:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:47:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 300 transitions. [2024-05-12 10:47:43,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5802707930367504 [2024-05-12 10:47:43,639 INFO L175 Difference]: Start difference. First operand has 438 places, 592 transitions, 7874 flow. Second operand 11 states and 300 transitions. [2024-05-12 10:47:43,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 644 transitions, 9758 flow [2024-05-12 10:47:49,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 644 transitions, 9438 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-05-12 10:47:49,696 INFO L231 Difference]: Finished difference. Result has 444 places, 595 transitions, 7984 flow [2024-05-12 10:47:49,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7565, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7984, PETRI_PLACES=444, PETRI_TRANSITIONS=595} [2024-05-12 10:47:49,697 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 393 predicate places. [2024-05-12 10:47:49,697 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 595 transitions, 7984 flow [2024-05-12 10:47:49,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:49,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:49,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:49,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-05-12 10:47:49,697 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:49,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash -474148823, now seen corresponding path program 17 times [2024-05-12 10:47:49,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:49,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643705892] [2024-05-12 10:47:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:49,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:49,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:49,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643705892] [2024-05-12 10:47:49,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643705892] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:49,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:49,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:49,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171245578] [2024-05-12 10:47:49,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:49,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:49,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:50,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:47:50,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 595 transitions, 7984 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:50,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:50,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:47:50,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:52,431 INFO L124 PetriNetUnfolderBase]: 6306/10788 cut-off events. [2024-05-12 10:47:52,431 INFO L125 PetriNetUnfolderBase]: For 828043/828383 co-relation queries the response was YES. [2024-05-12 10:47:52,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67288 conditions, 10788 events. 6306/10788 cut-off events. For 828043/828383 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 83167 event pairs, 1248 based on Foata normal form. 337/11075 useless extension candidates. Maximal degree in co-relation 67087. Up to 8780 conditions per place. [2024-05-12 10:47:52,602 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 446 selfloop transitions, 193 changer transitions 0/653 dead transitions. [2024-05-12 10:47:52,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 653 transitions, 10365 flow [2024-05-12 10:47:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:47:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:47:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-05-12 10:47:52,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6191489361702127 [2024-05-12 10:47:52,603 INFO L175 Difference]: Start difference. First operand has 444 places, 595 transitions, 7984 flow. Second operand 10 states and 291 transitions. [2024-05-12 10:47:52,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 653 transitions, 10365 flow [2024-05-12 10:47:57,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 653 transitions, 9961 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-05-12 10:47:57,564 INFO L231 Difference]: Finished difference. Result has 445 places, 598 transitions, 8007 flow [2024-05-12 10:47:57,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7586, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8007, PETRI_PLACES=445, PETRI_TRANSITIONS=598} [2024-05-12 10:47:57,565 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 394 predicate places. [2024-05-12 10:47:57,565 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 598 transitions, 8007 flow [2024-05-12 10:47:57,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:57,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:57,565 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, 1] [2024-05-12 10:47:57,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-05-12 10:47:57,565 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:57,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:57,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1953432337, now seen corresponding path program 18 times [2024-05-12 10:47:57,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:57,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541556189] [2024-05-12 10:47:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:57,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:57,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:57,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541556189] [2024-05-12 10:47:57,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541556189] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:57,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:57,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:57,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858271655] [2024-05-12 10:47:57,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:57,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:57,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:57,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:47:57,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 598 transitions, 8007 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:57,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:57,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:47:57,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:00,174 INFO L124 PetriNetUnfolderBase]: 6303/10475 cut-off events. [2024-05-12 10:48:00,175 INFO L125 PetriNetUnfolderBase]: For 831790/832135 co-relation queries the response was YES. [2024-05-12 10:48:00,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66908 conditions, 10475 events. 6303/10475 cut-off events. For 831790/832135 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 79324 event pairs, 1109 based on Foata normal form. 342/10767 useless extension candidates. Maximal degree in co-relation 66706. Up to 8777 conditions per place. [2024-05-12 10:48:00,333 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 442 selfloop transitions, 195 changer transitions 0/651 dead transitions. [2024-05-12 10:48:00,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 651 transitions, 10117 flow [2024-05-12 10:48:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:48:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:48:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-05-12 10:48:00,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 10:48:00,334 INFO L175 Difference]: Start difference. First operand has 445 places, 598 transitions, 8007 flow. Second operand 11 states and 308 transitions. [2024-05-12 10:48:00,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 651 transitions, 10117 flow [2024-05-12 10:48:05,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 651 transitions, 9585 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-05-12 10:48:05,858 INFO L231 Difference]: Finished difference. Result has 447 places, 598 transitions, 7871 flow [2024-05-12 10:48:05,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7475, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7871, PETRI_PLACES=447, PETRI_TRANSITIONS=598} [2024-05-12 10:48:05,859 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 396 predicate places. [2024-05-12 10:48:05,859 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 598 transitions, 7871 flow [2024-05-12 10:48:05,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:05,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:05,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:05,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-05-12 10:48:05,860 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:05,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:05,860 INFO L85 PathProgramCache]: Analyzing trace with hash 30400699, now seen corresponding path program 19 times [2024-05-12 10:48:05,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:05,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946949417] [2024-05-12 10:48:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:05,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:06,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946949417] [2024-05-12 10:48:06,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946949417] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:06,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:06,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:48:06,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986813241] [2024-05-12 10:48:06,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:06,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:48:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:48:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:48:06,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:48:06,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 598 transitions, 7871 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:06,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:06,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:48:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:08,775 INFO L124 PetriNetUnfolderBase]: 6300/10578 cut-off events. [2024-05-12 10:48:08,776 INFO L125 PetriNetUnfolderBase]: For 836769/837119 co-relation queries the response was YES. [2024-05-12 10:48:08,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66830 conditions, 10578 events. 6300/10578 cut-off events. For 836769/837119 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 80697 event pairs, 1144 based on Foata normal form. 351/10879 useless extension candidates. Maximal degree in co-relation 66627. Up to 9123 conditions per place. [2024-05-12 10:48:08,936 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 547 selfloop transitions, 86 changer transitions 0/647 dead transitions. [2024-05-12 10:48:08,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 647 transitions, 9499 flow [2024-05-12 10:48:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:48:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:48:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 322 transitions. [2024-05-12 10:48:08,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5709219858156028 [2024-05-12 10:48:08,937 INFO L175 Difference]: Start difference. First operand has 447 places, 598 transitions, 7871 flow. Second operand 12 states and 322 transitions. [2024-05-12 10:48:08,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 647 transitions, 9499 flow [2024-05-12 10:48:15,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 647 transitions, 9128 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-05-12 10:48:15,721 INFO L231 Difference]: Finished difference. Result has 451 places, 598 transitions, 7678 flow [2024-05-12 10:48:15,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7500, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7678, PETRI_PLACES=451, PETRI_TRANSITIONS=598} [2024-05-12 10:48:15,721 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 400 predicate places. [2024-05-12 10:48:15,721 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 598 transitions, 7678 flow [2024-05-12 10:48:15,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:15,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:48:15,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:48:15,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-05-12 10:48:15,722 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:48:15,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:48:15,722 INFO L85 PathProgramCache]: Analyzing trace with hash 346094779, now seen corresponding path program 20 times [2024-05-12 10:48:15,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:48:15,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310678720] [2024-05-12 10:48:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:48:15,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:48:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:48:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:48:16,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:48:16,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310678720] [2024-05-12 10:48:16,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310678720] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:48:16,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:48:16,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:48:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400727000] [2024-05-12 10:48:16,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:48:16,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:48:16,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:48:16,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:48:16,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:48:16,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-05-12 10:48:16,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 598 transitions, 7678 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:48:16,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:48:16,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-05-12 10:48:16,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:48:18,593 INFO L124 PetriNetUnfolderBase]: 6297/10472 cut-off events. [2024-05-12 10:48:18,593 INFO L125 PetriNetUnfolderBase]: For 841329/841679 co-relation queries the response was YES. [2024-05-12 10:48:18,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66255 conditions, 10472 events. 6297/10472 cut-off events. For 841329/841679 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 79355 event pairs, 1094 based on Foata normal form. 351/10773 useless extension candidates. Maximal degree in co-relation 66051. Up to 9120 conditions per place. [2024-05-12 10:48:18,757 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 540 selfloop transitions, 86 changer transitions 0/640 dead transitions. [2024-05-12 10:48:18,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 640 transitions, 9038 flow [2024-05-12 10:48:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:48:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:48:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-05-12 10:48:18,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829787234042553 [2024-05-12 10:48:18,758 INFO L175 Difference]: Start difference. First operand has 451 places, 598 transitions, 7678 flow. Second operand 10 states and 274 transitions. [2024-05-12 10:48:18,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 640 transitions, 9038 flow