./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix044_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix044_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix044_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix044_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:24:26,117 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:24:26,155 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:24:26,158 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:24:26,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:24:26,179 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:24:26,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:24:26,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:24:26,181 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:24:26,184 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:24:26,184 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:24:26,185 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:24:26,185 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:24:26,186 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:24:26,186 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:24:26,187 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:24:26,187 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:24:26,187 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:24:26,187 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:24:26,187 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:24:26,188 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:24:26,188 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:24:26,188 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:24:26,188 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:24:26,189 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:24:26,189 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:24:26,189 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:24:26,189 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:24:26,190 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:24:26,190 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:24:26,191 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:24:26,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:24:26,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:24:26,192 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:24:26,192 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:24:26,192 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:24:26,192 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:24:26,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:24:26,193 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:24:26,193 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:24:26,193 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:24:26,193 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:24:26,193 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:24:26,194 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:24:26,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:24:26,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:24:26,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:24:26,427 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:24:26,428 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:24:26,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix044_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:24:27,439 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:24:27,640 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:24:27,640 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix044_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:24:27,659 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b3a17919/577e2256b6e84f8086caecafd6644ee0/FLAG8184016a2 [2024-06-20 16:24:27,673 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b3a17919/577e2256b6e84f8086caecafd6644ee0 [2024-06-20 16:24:27,675 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:24:27,682 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:24:27,683 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix044_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-20 16:24:27,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:24:27,829 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:24:27,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:24:27,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:24:27,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:24:27,835 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:24:27" (1/2) ... [2024-06-20 16:24:27,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@344315aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:27, skipping insertion in model container [2024-06-20 16:24:27,837 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:24:27" (1/2) ... [2024-06-20 16:24:27,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5fd270dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:27, skipping insertion in model container [2024-06-20 16:24:27,839 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:24:27" (2/2) ... [2024-06-20 16:24:27,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@344315aa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:27, skipping insertion in model container [2024-06-20 16:24:27,840 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:24:27" (2/2) ... [2024-06-20 16:24:27,840 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:24:27,945 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:24:27,946 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0) [2024-06-20 16:24:27,946 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0) [2024-06-20 16:24:27,946 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] ((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0) [2024-06-20 16:24:27,947 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0) [2024-06-20 16:24:27,947 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:24:27,948 INFO L106 edCorrectnessWitness]: ghost_update [L870-L870] multithreaded = 1; [2024-06-20 16:24:27,985 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:24:28,255 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:24:28,264 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:24:28,386 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:24:28,423 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:24:28,424 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28 WrapperNode [2024-06-20 16:24:28,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:24:28,425 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:24:28,425 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:24:28,425 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:24:28,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,475 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-20 16:24:28,477 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:24:28,481 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:24:28,481 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:24:28,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:24:28,498 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,501 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,557 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:24:28,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,557 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,574 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:24:28,575 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:24:28,575 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:24:28,575 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:24:28,576 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (1/1) ... [2024-06-20 16:24:28,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:24:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:24:28,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:24:28,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:24:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:24:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:24:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:24:28,639 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:24:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:24:28,639 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:24:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:24:28,639 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:24:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:24:28,640 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:24:28,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:24:28,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:24:28,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:24:28,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:24:28,642 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:24:28,746 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:24:28,747 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:24:29,054 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:24:29,054 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:24:29,197 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:24:29,197 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:24:29,197 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:24:29 BoogieIcfgContainer [2024-06-20 16:24:29,198 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:24:29,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:24:29,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:24:29,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:24:29,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:24:27" (1/4) ... [2024-06-20 16:24:29,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14648d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:24:29, skipping insertion in model container [2024-06-20 16:24:29,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:24:27" (2/4) ... [2024-06-20 16:24:29,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14648d94 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:24:29, skipping insertion in model container [2024-06-20 16:24:29,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:28" (3/4) ... [2024-06-20 16:24:29,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14648d94 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:24:29, skipping insertion in model container [2024-06-20 16:24:29,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:24:29" (4/4) ... [2024-06-20 16:24:29,205 INFO L112 eAbstractionObserver]: Analyzing ICFG mix044_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:24:29,218 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:24:29,218 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:24:29,218 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:24:29,262 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:24:29,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 16:24:29,310 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-20 16:24:29,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:24:29,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:24:29,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 16:24:29,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-20 16:24:29,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:24:29,336 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;@21860b9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:24:29,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:24:29,340 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:24:29,341 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:24:29,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:24:29,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:29,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:24:29,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:29,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash 405960659, now seen corresponding path program 1 times [2024-06-20 16:24:29,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:29,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545327321] [2024-06-20 16:24:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:29,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:30,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:30,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545327321] [2024-06-20 16:24:30,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545327321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:30,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:30,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:24:30,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540673226] [2024-06-20 16:24:30,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:30,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:24:30,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:30,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:24:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:24:30,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:24:30,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:30,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:30,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:24:30,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:32,425 INFO L124 PetriNetUnfolderBase]: 13287/18273 cut-off events. [2024-06-20 16:24:32,426 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-06-20 16:24:32,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36641 conditions, 18273 events. 13287/18273 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99651 event pairs, 10469 based on Foata normal form. 1/17841 useless extension candidates. Maximal degree in co-relation 36628. Up to 17917 conditions per place. [2024-06-20 16:24:32,529 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 45 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-20 16:24:32,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 235 flow [2024-06-20 16:24:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:24:32,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:24:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-20 16:24:32,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037735849056604 [2024-06-20 16:24:32,540 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 96 transitions. [2024-06-20 16:24:32,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 235 flow [2024-06-20 16:24:32,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:32,547 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-20 16:24:32,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-20 16:24:32,551 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-20 16:24:32,551 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-20 16:24:32,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:32,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:32,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:32,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:24:32,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:32,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:32,553 INFO L85 PathProgramCache]: Analyzing trace with hash -712681370, now seen corresponding path program 1 times [2024-06-20 16:24:32,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:32,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957905363] [2024-06-20 16:24:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:32,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:33,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:33,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957905363] [2024-06-20 16:24:33,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957905363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:33,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:33,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:24:33,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784418161] [2024-06-20 16:24:33,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:33,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:24:33,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:24:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:24:33,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:24:33,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:33,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:33,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:24:33,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:35,195 INFO L124 PetriNetUnfolderBase]: 13277/18267 cut-off events. [2024-06-20 16:24:35,196 INFO L125 PetriNetUnfolderBase]: For 3270/3270 co-relation queries the response was YES. [2024-06-20 16:24:35,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41086 conditions, 18267 events. 13277/18267 cut-off events. For 3270/3270 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99574 event pairs, 9539 based on Foata normal form. 4/18059 useless extension candidates. Maximal degree in co-relation 41074. Up to 17882 conditions per place. [2024-06-20 16:24:35,279 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-20 16:24:35,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-20 16:24:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:24:35,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:24:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-20 16:24:35,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-06-20 16:24:35,283 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 124 transitions. [2024-06-20 16:24:35,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-20 16:24:35,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:24:35,292 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-20 16:24:35,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-20 16:24:35,293 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-20 16:24:35,293 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-20 16:24:35,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:35,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:35,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:35,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:24:35,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:35,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:35,295 INFO L85 PathProgramCache]: Analyzing trace with hash -618284250, now seen corresponding path program 1 times [2024-06-20 16:24:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:35,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584662395] [2024-06-20 16:24:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:35,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:36,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:36,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584662395] [2024-06-20 16:24:36,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584662395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:36,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:36,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:24:36,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154628647] [2024-06-20 16:24:36,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:36,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:24:36,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:24:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:24:36,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:24:36,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:36,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:36,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:24:36,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:38,166 INFO L124 PetriNetUnfolderBase]: 13385/18430 cut-off events. [2024-06-20 16:24:38,166 INFO L125 PetriNetUnfolderBase]: For 9654/9654 co-relation queries the response was YES. [2024-06-20 16:24:38,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45949 conditions, 18430 events. 13385/18430 cut-off events. For 9654/9654 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 100862 event pairs, 7798 based on Foata normal form. 10/18242 useless extension candidates. Maximal degree in co-relation 45935. Up to 17855 conditions per place. [2024-06-20 16:24:38,248 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 75 selfloop transitions, 21 changer transitions 0/103 dead transitions. [2024-06-20 16:24:38,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 103 transitions, 551 flow [2024-06-20 16:24:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:24:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:24:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-20 16:24:38,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6188679245283019 [2024-06-20 16:24:38,250 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 164 transitions. [2024-06-20 16:24:38,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 103 transitions, 551 flow [2024-06-20 16:24:38,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 103 transitions, 532 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:24:38,254 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 314 flow [2024-06-20 16:24:38,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-20 16:24:38,255 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-20 16:24:38,255 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 314 flow [2024-06-20 16:24:38,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:38,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:38,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:38,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:24:38,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:38,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1255212561, now seen corresponding path program 1 times [2024-06-20 16:24:38,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:38,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17766337] [2024-06-20 16:24:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:38,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:39,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:39,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17766337] [2024-06-20 16:24:39,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17766337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:39,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:39,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:24:39,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786445800] [2024-06-20 16:24:39,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:39,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:24:39,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:39,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:24:39,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:24:39,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:24:39,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:39,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:39,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:24:39,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:40,872 INFO L124 PetriNetUnfolderBase]: 13431/18496 cut-off events. [2024-06-20 16:24:40,872 INFO L125 PetriNetUnfolderBase]: For 23379/23381 co-relation queries the response was YES. [2024-06-20 16:24:40,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54275 conditions, 18496 events. 13431/18496 cut-off events. For 23379/23381 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 101157 event pairs, 6520 based on Foata normal form. 10/18307 useless extension candidates. Maximal degree in co-relation 54258. Up to 17777 conditions per place. [2024-06-20 16:24:41,000 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 90 selfloop transitions, 37 changer transitions 0/134 dead transitions. [2024-06-20 16:24:41,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 134 transitions, 862 flow [2024-06-20 16:24:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:24:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:24:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-20 16:24:41,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-06-20 16:24:41,002 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 314 flow. Second operand 6 states and 198 transitions. [2024-06-20 16:24:41,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 134 transitions, 862 flow [2024-06-20 16:24:41,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 134 transitions, 850 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:24:41,013 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 552 flow [2024-06-20 16:24:41,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=552, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2024-06-20 16:24:41,014 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2024-06-20 16:24:41,014 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 552 flow [2024-06-20 16:24:41,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:41,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:41,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:41,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:24:41,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:41,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash 256885529, now seen corresponding path program 1 times [2024-06-20 16:24:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:41,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343961785] [2024-06-20 16:24:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:41,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:42,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:42,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343961785] [2024-06-20 16:24:42,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343961785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:42,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:42,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:24:42,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206147591] [2024-06-20 16:24:42,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:42,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:24:42,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:42,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:24:42,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:24:42,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:24:42,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 552 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:42,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:42,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:24:42,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:43,927 INFO L124 PetriNetUnfolderBase]: 13691/18889 cut-off events. [2024-06-20 16:24:43,927 INFO L125 PetriNetUnfolderBase]: For 44247/44247 co-relation queries the response was YES. [2024-06-20 16:24:43,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63919 conditions, 18889 events. 13691/18889 cut-off events. For 44247/44247 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 103616 event pairs, 5432 based on Foata normal form. 44/18735 useless extension candidates. Maximal degree in co-relation 63896. Up to 17900 conditions per place. [2024-06-20 16:24:44,044 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 114 selfloop transitions, 29 changer transitions 0/150 dead transitions. [2024-06-20 16:24:44,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 150 transitions, 1110 flow [2024-06-20 16:24:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-20 16:24:44,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601078167115903 [2024-06-20 16:24:44,046 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 552 flow. Second operand 7 states and 223 transitions. [2024-06-20 16:24:44,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 150 transitions, 1110 flow [2024-06-20 16:24:44,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 150 transitions, 1074 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-20 16:24:44,065 INFO L231 Difference]: Finished difference. Result has 79 places, 88 transitions, 660 flow [2024-06-20 16:24:44,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=660, PETRI_PLACES=79, PETRI_TRANSITIONS=88} [2024-06-20 16:24:44,066 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-20 16:24:44,066 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 88 transitions, 660 flow [2024-06-20 16:24:44,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:44,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:44,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:44,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:24:44,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:44,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:44,067 INFO L85 PathProgramCache]: Analyzing trace with hash -890928937, now seen corresponding path program 1 times [2024-06-20 16:24:44,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:44,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639910378] [2024-06-20 16:24:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:44,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:44,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:44,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639910378] [2024-06-20 16:24:44,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639910378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:44,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:44,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:24:44,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348702569] [2024-06-20 16:24:44,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:44,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:24:44,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:44,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:24:44,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:24:44,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:24:44,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 88 transitions, 660 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:44,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:44,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:24:44,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:46,856 INFO L124 PetriNetUnfolderBase]: 13673/18854 cut-off events. [2024-06-20 16:24:46,856 INFO L125 PetriNetUnfolderBase]: For 55814/55814 co-relation queries the response was YES. [2024-06-20 16:24:46,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67086 conditions, 18854 events. 13673/18854 cut-off events. For 55814/55814 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 103406 event pairs, 6718 based on Foata normal form. 6/18652 useless extension candidates. Maximal degree in co-relation 67058. Up to 18456 conditions per place. [2024-06-20 16:24:46,993 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 86 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-06-20 16:24:46,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 105 transitions, 902 flow [2024-06-20 16:24:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:24:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:24:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 16:24:46,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-20 16:24:46,995 INFO L175 Difference]: Start difference. First operand has 79 places, 88 transitions, 660 flow. Second operand 5 states and 125 transitions. [2024-06-20 16:24:46,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 105 transitions, 902 flow [2024-06-20 16:24:47,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 834 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:47,021 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 632 flow [2024-06-20 16:24:47,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=632, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-20 16:24:47,022 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-20 16:24:47,022 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 632 flow [2024-06-20 16:24:47,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:47,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:47,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:24:47,023 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:47,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1879612572, now seen corresponding path program 1 times [2024-06-20 16:24:47,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:47,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443679373] [2024-06-20 16:24:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:47,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:47,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:47,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443679373] [2024-06-20 16:24:47,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443679373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:47,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:47,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:24:47,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234413027] [2024-06-20 16:24:47,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:47,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:24:47,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:47,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:24:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:24:48,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:24:48,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 632 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:48,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:48,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:24:48,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:49,802 INFO L124 PetriNetUnfolderBase]: 13699/18881 cut-off events. [2024-06-20 16:24:49,802 INFO L125 PetriNetUnfolderBase]: For 63138/63138 co-relation queries the response was YES. [2024-06-20 16:24:49,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68091 conditions, 18881 events. 13699/18881 cut-off events. For 63138/63138 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 103426 event pairs, 6377 based on Foata normal form. 12/18679 useless extension candidates. Maximal degree in co-relation 68061. Up to 18303 conditions per place. [2024-06-20 16:24:49,939 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 93 selfloop transitions, 25 changer transitions 0/124 dead transitions. [2024-06-20 16:24:49,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 124 transitions, 1032 flow [2024-06-20 16:24:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:24:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:24:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 16:24:49,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:24:49,941 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 632 flow. Second operand 6 states and 159 transitions. [2024-06-20 16:24:49,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 124 transitions, 1032 flow [2024-06-20 16:24:49,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 991 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:49,968 INFO L231 Difference]: Finished difference. Result has 82 places, 92 transitions, 700 flow [2024-06-20 16:24:49,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=700, PETRI_PLACES=82, PETRI_TRANSITIONS=92} [2024-06-20 16:24:49,969 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-20 16:24:49,969 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 92 transitions, 700 flow [2024-06-20 16:24:49,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:49,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:49,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:49,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:24:49,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:49,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1484159946, now seen corresponding path program 2 times [2024-06-20 16:24:49,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:49,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737346033] [2024-06-20 16:24:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:49,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:50,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:50,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737346033] [2024-06-20 16:24:50,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737346033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:50,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:50,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:24:50,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784888138] [2024-06-20 16:24:50,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:24:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:50,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:24:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:24:50,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:24:50,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 92 transitions, 700 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:50,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:50,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:24:50,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:52,854 INFO L124 PetriNetUnfolderBase]: 13609/18742 cut-off events. [2024-06-20 16:24:52,854 INFO L125 PetriNetUnfolderBase]: For 72159/72159 co-relation queries the response was YES. [2024-06-20 16:24:52,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69082 conditions, 18742 events. 13609/18742 cut-off events. For 72159/72159 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 102570 event pairs, 6676 based on Foata normal form. 6/18536 useless extension candidates. Maximal degree in co-relation 69052. Up to 18333 conditions per place. [2024-06-20 16:24:52,972 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 97 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-06-20 16:24:52,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 988 flow [2024-06-20 16:24:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:24:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:24:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 16:24:52,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-20 16:24:52,974 INFO L175 Difference]: Start difference. First operand has 82 places, 92 transitions, 700 flow. Second operand 6 states and 148 transitions. [2024-06-20 16:24:52,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 988 flow [2024-06-20 16:24:53,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 117 transitions, 945 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:53,006 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 696 flow [2024-06-20 16:24:53,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=696, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-06-20 16:24:53,007 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-20 16:24:53,007 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 696 flow [2024-06-20 16:24:53,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:53,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:53,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:53,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:24:53,008 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:53,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:53,008 INFO L85 PathProgramCache]: Analyzing trace with hash 377055494, now seen corresponding path program 1 times [2024-06-20 16:24:53,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:53,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663537033] [2024-06-20 16:24:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:53,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:54,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:54,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663537033] [2024-06-20 16:24:54,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663537033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:54,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:54,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:54,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450948002] [2024-06-20 16:24:54,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:54,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:54,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:54,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:54,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:54,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-20 16:24:54,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 696 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:54,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:54,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-20 16:24:54,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:56,842 INFO L124 PetriNetUnfolderBase]: 16509/22603 cut-off events. [2024-06-20 16:24:56,842 INFO L125 PetriNetUnfolderBase]: For 98900/98900 co-relation queries the response was YES. [2024-06-20 16:24:56,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83220 conditions, 22603 events. 16509/22603 cut-off events. For 98900/98900 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 122462 event pairs, 8151 based on Foata normal form. 6/22355 useless extension candidates. Maximal degree in co-relation 83189. Up to 22152 conditions per place. [2024-06-20 16:24:56,993 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 106 selfloop transitions, 20 changer transitions 0/131 dead transitions. [2024-06-20 16:24:56,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 131 transitions, 1101 flow [2024-06-20 16:24:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 16:24:56,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444743935309973 [2024-06-20 16:24:56,995 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 696 flow. Second operand 7 states and 165 transitions. [2024-06-20 16:24:56,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 131 transitions, 1101 flow [2024-06-20 16:24:57,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 131 transitions, 1031 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:57,039 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 760 flow [2024-06-20 16:24:57,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=760, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-20 16:24:57,040 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-20 16:24:57,040 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 760 flow [2024-06-20 16:24:57,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:57,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:57,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:57,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:24:57,040 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:57,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1032271396, now seen corresponding path program 1 times [2024-06-20 16:24:57,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:57,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014593209] [2024-06-20 16:24:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:57,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014593209] [2024-06-20 16:24:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014593209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:57,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:57,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:24:57,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626507531] [2024-06-20 16:24:57,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:24:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:24:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:24:57,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-20 16:24:57,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 760 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:57,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:57,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-20 16:24:57,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:59,986 INFO L124 PetriNetUnfolderBase]: 16502/22666 cut-off events. [2024-06-20 16:24:59,986 INFO L125 PetriNetUnfolderBase]: For 117346/117346 co-relation queries the response was YES. [2024-06-20 16:25:00,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88057 conditions, 22666 events. 16502/22666 cut-off events. For 117346/117346 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 122950 event pairs, 8273 based on Foata normal form. 2/22450 useless extension candidates. Maximal degree in co-relation 88025. Up to 22209 conditions per place. [2024-06-20 16:25:00,134 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 102 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2024-06-20 16:25:00,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 1058 flow [2024-06-20 16:25:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:25:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:25:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-20 16:25:00,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377358490566038 [2024-06-20 16:25:00,135 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 760 flow. Second operand 5 states and 116 transitions. [2024-06-20 16:25:00,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 1058 flow [2024-06-20 16:25:00,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 998 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:00,185 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 775 flow [2024-06-20 16:25:00,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=775, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2024-06-20 16:25:00,186 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-20 16:25:00,186 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 775 flow [2024-06-20 16:25:00,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:00,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:00,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:00,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:25:00,186 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:00,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:00,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1869885725, now seen corresponding path program 1 times [2024-06-20 16:25:00,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:00,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450429896] [2024-06-20 16:25:00,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:00,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:01,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:01,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450429896] [2024-06-20 16:25:01,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450429896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:01,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:01,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:25:01,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509914149] [2024-06-20 16:25:01,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:01,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:25:01,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:01,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:25:01,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:25:01,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:01,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 775 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:01,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:01,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:01,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:03,769 INFO L124 PetriNetUnfolderBase]: 16215/22355 cut-off events. [2024-06-20 16:25:03,769 INFO L125 PetriNetUnfolderBase]: For 139840/139840 co-relation queries the response was YES. [2024-06-20 16:25:03,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91377 conditions, 22355 events. 16215/22355 cut-off events. For 139840/139840 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 124476 event pairs, 6804 based on Foata normal form. 6/22137 useless extension candidates. Maximal degree in co-relation 91344. Up to 21486 conditions per place. [2024-06-20 16:25:03,906 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 111 selfloop transitions, 37 changer transitions 0/155 dead transitions. [2024-06-20 16:25:03,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 155 transitions, 1241 flow [2024-06-20 16:25:03,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:03,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 16:25:03,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-20 16:25:03,907 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 775 flow. Second operand 8 states and 208 transitions. [2024-06-20 16:25:03,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 155 transitions, 1241 flow [2024-06-20 16:25:03,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 155 transitions, 1196 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 16:25:03,969 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 864 flow [2024-06-20 16:25:03,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=864, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-20 16:25:03,970 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-20 16:25:03,970 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 864 flow [2024-06-20 16:25:03,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:03,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:03,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:03,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:25:03,971 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:03,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:03,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1393347035, now seen corresponding path program 1 times [2024-06-20 16:25:03,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:03,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494378790] [2024-06-20 16:25:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:03,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:05,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:05,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494378790] [2024-06-20 16:25:05,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494378790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:05,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:05,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:05,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43126018] [2024-06-20 16:25:05,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:05,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:05,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:05,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:05,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-20 16:25:05,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 864 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:05,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:05,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-20 16:25:05,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:07,859 INFO L124 PetriNetUnfolderBase]: 16510/22564 cut-off events. [2024-06-20 16:25:07,859 INFO L125 PetriNetUnfolderBase]: For 175358/175358 co-relation queries the response was YES. [2024-06-20 16:25:07,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97910 conditions, 22564 events. 16510/22564 cut-off events. For 175358/175358 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 122472 event pairs, 10101 based on Foata normal form. 3/22435 useless extension candidates. Maximal degree in co-relation 97876. Up to 22140 conditions per place. [2024-06-20 16:25:07,989 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 112 selfloop transitions, 27 changer transitions 0/144 dead transitions. [2024-06-20 16:25:07,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 144 transitions, 1283 flow [2024-06-20 16:25:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-20 16:25:07,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419811320754717 [2024-06-20 16:25:07,991 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 864 flow. Second operand 8 states and 178 transitions. [2024-06-20 16:25:07,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 144 transitions, 1283 flow [2024-06-20 16:25:08,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 1171 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:08,077 INFO L231 Difference]: Finished difference. Result has 96 places, 113 transitions, 894 flow [2024-06-20 16:25:08,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=894, PETRI_PLACES=96, PETRI_TRANSITIONS=113} [2024-06-20 16:25:08,078 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-20 16:25:08,078 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 113 transitions, 894 flow [2024-06-20 16:25:08,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:08,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:08,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:08,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:25:08,079 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:08,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:08,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1935640452, now seen corresponding path program 1 times [2024-06-20 16:25:08,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:08,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716899833] [2024-06-20 16:25:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:08,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:08,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:08,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716899833] [2024-06-20 16:25:08,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716899833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:08,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:08,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:25:08,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877397692] [2024-06-20 16:25:08,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:08,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:25:08,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:08,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:25:08,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:25:08,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-20 16:25:08,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 113 transitions, 894 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:08,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:08,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-20 16:25:08,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:11,559 INFO L124 PetriNetUnfolderBase]: 16516/22775 cut-off events. [2024-06-20 16:25:11,559 INFO L125 PetriNetUnfolderBase]: For 196690/196690 co-relation queries the response was YES. [2024-06-20 16:25:11,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99479 conditions, 22775 events. 16516/22775 cut-off events. For 196690/196690 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 125113 event pairs, 10046 based on Foata normal form. 6/22779 useless extension candidates. Maximal degree in co-relation 99443. Up to 22181 conditions per place. [2024-06-20 16:25:11,716 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 120 selfloop transitions, 23 changer transitions 0/148 dead transitions. [2024-06-20 16:25:11,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 148 transitions, 1406 flow [2024-06-20 16:25:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:25:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:25:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 16:25:11,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2024-06-20 16:25:11,717 INFO L175 Difference]: Start difference. First operand has 96 places, 113 transitions, 894 flow. Second operand 6 states and 143 transitions. [2024-06-20 16:25:11,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 148 transitions, 1406 flow [2024-06-20 16:25:11,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 1332 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:11,845 INFO L231 Difference]: Finished difference. Result has 98 places, 127 transitions, 1037 flow [2024-06-20 16:25:11,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1037, PETRI_PLACES=98, PETRI_TRANSITIONS=127} [2024-06-20 16:25:11,846 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-20 16:25:11,846 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 127 transitions, 1037 flow [2024-06-20 16:25:11,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:11,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:11,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:11,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:25:11,847 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:11,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:11,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1582714897, now seen corresponding path program 1 times [2024-06-20 16:25:11,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:11,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392822752] [2024-06-20 16:25:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:11,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:13,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:13,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392822752] [2024-06-20 16:25:13,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392822752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:13,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:13,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:13,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908586512] [2024-06-20 16:25:13,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:13,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:13,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:13,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 127 transitions, 1037 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:13,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:13,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:13,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:16,179 INFO L124 PetriNetUnfolderBase]: 17361/24274 cut-off events. [2024-06-20 16:25:16,179 INFO L125 PetriNetUnfolderBase]: For 245820/245872 co-relation queries the response was YES. [2024-06-20 16:25:16,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113481 conditions, 24274 events. 17361/24274 cut-off events. For 245820/245872 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 139439 event pairs, 6683 based on Foata normal form. 76/24338 useless extension candidates. Maximal degree in co-relation 113442. Up to 22173 conditions per place. [2024-06-20 16:25:16,344 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 178 selfloop transitions, 60 changer transitions 0/245 dead transitions. [2024-06-20 16:25:16,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 245 transitions, 2280 flow [2024-06-20 16:25:16,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:16,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-20 16:25:16,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052410901467506 [2024-06-20 16:25:16,346 INFO L175 Difference]: Start difference. First operand has 98 places, 127 transitions, 1037 flow. Second operand 9 states and 241 transitions. [2024-06-20 16:25:16,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 245 transitions, 2280 flow [2024-06-20 16:25:16,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 245 transitions, 2236 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-20 16:25:16,499 INFO L231 Difference]: Finished difference. Result has 110 places, 172 transitions, 1644 flow [2024-06-20 16:25:16,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1644, PETRI_PLACES=110, PETRI_TRANSITIONS=172} [2024-06-20 16:25:16,500 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-20 16:25:16,500 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 172 transitions, 1644 flow [2024-06-20 16:25:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:16,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:16,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:16,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:25:16,500 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:16,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:16,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1499829597, now seen corresponding path program 2 times [2024-06-20 16:25:16,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:16,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761721537] [2024-06-20 16:25:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:16,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:17,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761721537] [2024-06-20 16:25:17,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761721537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:17,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:17,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:17,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675512168] [2024-06-20 16:25:17,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:17,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:17,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:17,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:17,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:17,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 172 transitions, 1644 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:17,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:17,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:17,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:21,046 INFO L124 PetriNetUnfolderBase]: 17678/24733 cut-off events. [2024-06-20 16:25:21,046 INFO L125 PetriNetUnfolderBase]: For 288615/288685 co-relation queries the response was YES. [2024-06-20 16:25:21,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123053 conditions, 24733 events. 17678/24733 cut-off events. For 288615/288685 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 141986 event pairs, 7036 based on Foata normal form. 112/24835 useless extension candidates. Maximal degree in co-relation 123007. Up to 23139 conditions per place. [2024-06-20 16:25:21,311 INFO L140 encePairwiseOnDemand]: 36/53 looper letters, 182 selfloop transitions, 68 changer transitions 0/257 dead transitions. [2024-06-20 16:25:21,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 257 transitions, 2605 flow [2024-06-20 16:25:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:25:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:25:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-20 16:25:21,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-20 16:25:21,313 INFO L175 Difference]: Start difference. First operand has 110 places, 172 transitions, 1644 flow. Second operand 10 states and 260 transitions. [2024-06-20 16:25:21,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 257 transitions, 2605 flow [2024-06-20 16:25:21,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 257 transitions, 2561 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-20 16:25:21,631 INFO L231 Difference]: Finished difference. Result has 121 places, 187 transitions, 1965 flow [2024-06-20 16:25:21,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1965, PETRI_PLACES=121, PETRI_TRANSITIONS=187} [2024-06-20 16:25:21,632 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-20 16:25:21,632 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 187 transitions, 1965 flow [2024-06-20 16:25:21,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:21,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:21,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:21,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:25:21,633 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:21,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:21,633 INFO L85 PathProgramCache]: Analyzing trace with hash 819089745, now seen corresponding path program 3 times [2024-06-20 16:25:21,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:21,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973774574] [2024-06-20 16:25:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:22,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:22,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973774574] [2024-06-20 16:25:22,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973774574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:22,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:22,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:25:22,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776773926] [2024-06-20 16:25:22,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:22,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:25:22,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:22,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:25:22,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:25:22,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:22,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 187 transitions, 1965 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:22,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:22,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:22,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:26,483 INFO L124 PetriNetUnfolderBase]: 19405/27393 cut-off events. [2024-06-20 16:25:26,483 INFO L125 PetriNetUnfolderBase]: For 352145/352260 co-relation queries the response was YES. [2024-06-20 16:25:26,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141364 conditions, 27393 events. 19405/27393 cut-off events. For 352145/352260 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 162273 event pairs, 5443 based on Foata normal form. 130/27512 useless extension candidates. Maximal degree in co-relation 141313. Up to 22309 conditions per place. [2024-06-20 16:25:26,732 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 151 selfloop transitions, 118 changer transitions 0/276 dead transitions. [2024-06-20 16:25:26,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 276 transitions, 3316 flow [2024-06-20 16:25:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-20 16:25:26,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306603773584906 [2024-06-20 16:25:26,734 INFO L175 Difference]: Start difference. First operand has 121 places, 187 transitions, 1965 flow. Second operand 8 states and 225 transitions. [2024-06-20 16:25:26,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 276 transitions, 3316 flow [2024-06-20 16:25:27,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 276 transitions, 3143 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:27,126 INFO L231 Difference]: Finished difference. Result has 125 places, 210 transitions, 2452 flow [2024-06-20 16:25:27,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2452, PETRI_PLACES=125, PETRI_TRANSITIONS=210} [2024-06-20 16:25:27,127 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-20 16:25:27,127 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 210 transitions, 2452 flow [2024-06-20 16:25:27,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:27,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:27,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:27,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:25:27,128 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:27,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:27,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1666015071, now seen corresponding path program 4 times [2024-06-20 16:25:27,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:27,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86273943] [2024-06-20 16:25:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:28,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:28,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86273943] [2024-06-20 16:25:28,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86273943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:28,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:28,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:25:28,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411633616] [2024-06-20 16:25:28,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:28,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:25:28,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:25:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:25:28,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:28,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 210 transitions, 2452 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:28,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:28,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:28,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:32,254 INFO L124 PetriNetUnfolderBase]: 20963/29669 cut-off events. [2024-06-20 16:25:32,254 INFO L125 PetriNetUnfolderBase]: For 432358/432524 co-relation queries the response was YES. [2024-06-20 16:25:32,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161666 conditions, 29669 events. 20963/29669 cut-off events. For 432358/432524 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 178405 event pairs, 7544 based on Foata normal form. 196/29854 useless extension candidates. Maximal degree in co-relation 161612. Up to 24450 conditions per place. [2024-06-20 16:25:32,558 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 165 selfloop transitions, 157 changer transitions 0/329 dead transitions. [2024-06-20 16:25:32,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 329 transitions, 4362 flow [2024-06-20 16:25:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-20 16:25:32,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-20 16:25:32,559 INFO L175 Difference]: Start difference. First operand has 125 places, 210 transitions, 2452 flow. Second operand 8 states and 224 transitions. [2024-06-20 16:25:32,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 329 transitions, 4362 flow [2024-06-20 16:25:33,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 329 transitions, 4179 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 16:25:33,174 INFO L231 Difference]: Finished difference. Result has 132 places, 258 transitions, 3408 flow [2024-06-20 16:25:33,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3408, PETRI_PLACES=132, PETRI_TRANSITIONS=258} [2024-06-20 16:25:33,174 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-20 16:25:33,175 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 258 transitions, 3408 flow [2024-06-20 16:25:33,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:33,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:33,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:33,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:25:33,175 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:33,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1693781151, now seen corresponding path program 5 times [2024-06-20 16:25:33,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:33,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576853936] [2024-06-20 16:25:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:33,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:34,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:34,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576853936] [2024-06-20 16:25:34,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576853936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:34,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:34,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:25:34,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572298056] [2024-06-20 16:25:34,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:34,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:25:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:34,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:25:34,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:25:34,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:34,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 258 transitions, 3408 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:34,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:34,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:34,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:38,793 INFO L124 PetriNetUnfolderBase]: 21180/29995 cut-off events. [2024-06-20 16:25:38,794 INFO L125 PetriNetUnfolderBase]: For 464546/464716 co-relation queries the response was YES. [2024-06-20 16:25:38,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168604 conditions, 29995 events. 21180/29995 cut-off events. For 464546/464716 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 180672 event pairs, 7751 based on Foata normal form. 212/30199 useless extension candidates. Maximal degree in co-relation 168546. Up to 27152 conditions per place. [2024-06-20 16:25:39,265 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 182 selfloop transitions, 139 changer transitions 0/328 dead transitions. [2024-06-20 16:25:39,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 328 transitions, 4675 flow [2024-06-20 16:25:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-20 16:25:39,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-20 16:25:39,267 INFO L175 Difference]: Start difference. First operand has 132 places, 258 transitions, 3408 flow. Second operand 8 states and 220 transitions. [2024-06-20 16:25:39,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 328 transitions, 4675 flow [2024-06-20 16:25:39,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 328 transitions, 4547 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:39,919 INFO L231 Difference]: Finished difference. Result has 137 places, 267 transitions, 3816 flow [2024-06-20 16:25:39,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3816, PETRI_PLACES=137, PETRI_TRANSITIONS=267} [2024-06-20 16:25:39,919 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-20 16:25:39,920 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 267 transitions, 3816 flow [2024-06-20 16:25:39,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:39,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:39,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:39,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:25:39,920 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:39,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:39,921 INFO L85 PathProgramCache]: Analyzing trace with hash 304727117, now seen corresponding path program 1 times [2024-06-20 16:25:39,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:39,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446921758] [2024-06-20 16:25:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:39,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:40,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:40,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446921758] [2024-06-20 16:25:40,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446921758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:40,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:40,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:25:40,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871385721] [2024-06-20 16:25:40,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:40,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:25:40,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:40,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:25:40,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:25:40,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-20 16:25:40,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 267 transitions, 3816 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:40,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:40,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-20 16:25:40,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand