./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:26:20,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:26:20,653 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:26:20,656 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:26:20,657 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:26:20,669 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:26:20,671 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:26:20,671 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:26:20,672 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:26:20,673 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:26:20,673 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:26:20,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:26:20,674 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:26:20,675 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:26:20,676 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:26:20,676 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:26:20,676 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:26:20,677 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:26:20,679 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:26:20,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:26:20,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:26:20,680 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:26:20,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:26:20,680 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:26:20,680 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:26:20,681 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:26:20,681 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:26:20,681 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:26:20,681 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:26:20,682 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:26:20,682 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:26:20,683 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:26:20,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:26:20,683 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:26:20,683 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:26:20,684 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:26:20,684 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:26:20,684 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:26:20,684 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:26:20,684 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:26:20,684 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:26:20,685 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:26:20,685 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:26:20,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:26:20,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:26:20,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:26:20,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:26:20,867 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:26:20,868 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:26:20,869 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 21:26:21,832 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:26:22,074 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:26:22,074 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 21:26:22,085 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc34fd7d2/71c574d94ad342e68f36aa0637cbc3ca/FLAGcb54b74e7 [2024-06-27 21:26:22,095 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc34fd7d2/71c574d94ad342e68f36aa0637cbc3ca [2024-06-27 21:26:22,097 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:26:22,099 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:26:22,100 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 21:26:22,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:26:22,255 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:26:22,257 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:26:22,257 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:26:22,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:26:22,261 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:26:22" (1/2) ... [2024-06-27 21:26:22,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f73a104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:22, skipping insertion in model container [2024-06-27 21:26:22,262 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:26:22" (1/2) ... [2024-06-27 21:26:22,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15e30513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:22, skipping insertion in model container [2024-06-27 21:26:22,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:22" (2/2) ... [2024-06-27 21:26:22,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f73a104 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22, skipping insertion in model container [2024-06-27 21:26:22,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:22" (2/2) ... [2024-06-27 21:26:22,267 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:26:22,338 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:26:22,340 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:26:22,340 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:26:22,340 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:26:22,340 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:26:22,340 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-27 21:26:22,386 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:26:22,692 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:26:22,701 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:26:22,799 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:26:22,845 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:26:22,846 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22 WrapperNode [2024-06-27 21:26:22,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:26:22,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:26:22,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:26:22,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:26:22,853 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 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,872 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 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,895 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-27 21:26:22,895 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:26:22,896 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:26:22,896 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:26:22,896 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:26:22,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,907 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,919 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]. [2024-06-27 21:26:22,920 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,928 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,940 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:26:22,942 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:26:22,944 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:26:22,944 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:26:22,945 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (1/1) ... [2024-06-27 21:26:22,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:26:22,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:26:22,971 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) [2024-06-27 21:26:22,992 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 [2024-06-27 21:26:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:26:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:26:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:26:23,007 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:26:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:26:23,007 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:26:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:26:23,007 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:26:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:26:23,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:26:23,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:26:23,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:26:23,023 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:26:23,149 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:26:23,151 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:26:23,388 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:26:23,388 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:26:23,494 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:26:23,494 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:26:23,494 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:26:23 BoogieIcfgContainer [2024-06-27 21:26:23,494 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:26:23,496 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:26:23,496 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:26:23,499 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:26:23,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:26:22" (1/4) ... [2024-06-27 21:26:23,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3550b430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:26:23, skipping insertion in model container [2024-06-27 21:26:23,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:22" (2/4) ... [2024-06-27 21:26:23,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3550b430 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:26:23, skipping insertion in model container [2024-06-27 21:26:23,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:22" (3/4) ... [2024-06-27 21:26:23,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3550b430 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:26:23, skipping insertion in model container [2024-06-27 21:26:23,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:26:23" (4/4) ... [2024-06-27 21:26:23,500 INFO L112 eAbstractionObserver]: Analyzing ICFG safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 21:26:23,513 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:26:23,513 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:26:23,513 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:26:23,551 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:26:23,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:26:23,604 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 21:26:23,604 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:26:23,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:26:23,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:26:23,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 21:26:23,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:26:23,627 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;@2f08d7cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:26:23,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:26:23,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:26:23,633 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:26:23,633 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:26:23,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:23,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:26:23,634 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:23,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash 363617411, now seen corresponding path program 1 times [2024-06-27 21:26:23,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:23,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101566772] [2024-06-27 21:26:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:23,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:24,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:24,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101566772] [2024-06-27 21:26:24,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101566772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:24,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:24,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:26:24,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020010100] [2024-06-27 21:26:24,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:24,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:26:24,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:24,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:26:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:26:24,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-27 21:26:24,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 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) [2024-06-27 21:26:24,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:24,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-27 21:26:24,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:24,800 INFO L124 PetriNetUnfolderBase]: 942/1465 cut-off events. [2024-06-27 21:26:24,800 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 21:26:24,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2981 conditions, 1465 events. 942/1465 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7325 event pairs, 546 based on Foata normal form. 2/1426 useless extension candidates. Maximal degree in co-relation 2969. Up to 1428 conditions per place. [2024-06-27 21:26:24,814 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 21:26:24,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 171 flow [2024-06-27 21:26:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:26:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:26:24,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-27 21:26:24,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-27 21:26:24,825 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 80 transitions. [2024-06-27 21:26:24,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 171 flow [2024-06-27 21:26:24,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:24,828 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 21:26:24,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 21:26:24,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 21:26:24,832 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 21:26:24,832 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) [2024-06-27 21:26:24,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:24,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:24,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:26:24,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:24,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:24,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1544011682, now seen corresponding path program 1 times [2024-06-27 21:26:24,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:24,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958441620] [2024-06-27 21:26:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:24,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:25,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:25,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958441620] [2024-06-27 21:26:25,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958441620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:25,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:25,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:26:25,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166733119] [2024-06-27 21:26:25,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:25,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:26:25,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:25,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:26:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:26:25,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-27 21:26:25,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:25,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:25,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-27 21:26:25,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:25,491 INFO L124 PetriNetUnfolderBase]: 1134/1735 cut-off events. [2024-06-27 21:26:25,492 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2024-06-27 21:26:25,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 1735 events. 1134/1735 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8267 event pairs, 590 based on Foata normal form. 6/1738 useless extension candidates. Maximal degree in co-relation 4000. Up to 1676 conditions per place. [2024-06-27 21:26:25,502 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-27 21:26:25,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 256 flow [2024-06-27 21:26:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:26:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:26:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-27 21:26:25,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 21:26:25,505 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-27 21:26:25,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 256 flow [2024-06-27 21:26:25,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:26:25,507 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-27 21:26:25,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-27 21:26:25,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-27 21:26:25,508 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-27 21:26:25,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:25,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:25,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:25,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:26:25,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:25,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:25,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1973259754, now seen corresponding path program 1 times [2024-06-27 21:26:25,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:25,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543689566] [2024-06-27 21:26:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:25,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:26,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:26,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543689566] [2024-06-27 21:26:26,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543689566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:26,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:26,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:26:26,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042728481] [2024-06-27 21:26:26,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:26,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:26:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:26:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:26:26,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 21:26:26,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 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) [2024-06-27 21:26:26,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:26,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 21:26:26,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:26,455 INFO L124 PetriNetUnfolderBase]: 980/1528 cut-off events. [2024-06-27 21:26:26,455 INFO L125 PetriNetUnfolderBase]: For 738/740 co-relation queries the response was YES. [2024-06-27 21:26:26,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3911 conditions, 1528 events. 980/1528 cut-off events. For 738/740 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7446 event pairs, 562 based on Foata normal form. 3/1492 useless extension candidates. Maximal degree in co-relation 3895. Up to 1473 conditions per place. [2024-06-27 21:26:26,463 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 40 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-06-27 21:26:26,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 306 flow [2024-06-27 21:26:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:26:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:26:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-27 21:26:26,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 21:26:26,467 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 105 transitions. [2024-06-27 21:26:26,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 306 flow [2024-06-27 21:26:26,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 304 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 21:26:26,470 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 221 flow [2024-06-27 21:26:26,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-06-27 21:26:26,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-27 21:26:26,471 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 221 flow [2024-06-27 21:26:26,472 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) [2024-06-27 21:26:26,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:26,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:26,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:26:26,473 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:26,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:26,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1898268192, now seen corresponding path program 1 times [2024-06-27 21:26:26,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:26,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003990318] [2024-06-27 21:26:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:26,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:27,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:27,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003990318] [2024-06-27 21:26:27,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003990318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:27,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:27,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:26:27,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899631627] [2024-06-27 21:26:27,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:27,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:26:27,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:26:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:26:27,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-27 21:26:27,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:27,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:27,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-27 21:26:27,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:27,688 INFO L124 PetriNetUnfolderBase]: 1122/1716 cut-off events. [2024-06-27 21:26:27,688 INFO L125 PetriNetUnfolderBase]: For 1611/1619 co-relation queries the response was YES. [2024-06-27 21:26:27,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5029 conditions, 1716 events. 1122/1716 cut-off events. For 1611/1619 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8142 event pairs, 380 based on Foata normal form. 12/1725 useless extension candidates. Maximal degree in co-relation 5009. Up to 1627 conditions per place. [2024-06-27 21:26:27,697 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-27 21:26:27,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 77 transitions, 443 flow [2024-06-27 21:26:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 21:26:27,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-27 21:26:27,699 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 221 flow. Second operand 6 states and 142 transitions. [2024-06-27 21:26:27,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 77 transitions, 443 flow [2024-06-27 21:26:27,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 430 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:26:27,701 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 265 flow [2024-06-27 21:26:27,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-27 21:26:27,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-27 21:26:27,702 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 265 flow [2024-06-27 21:26:27,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:27,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:27,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:27,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:26:27,703 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:27,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:27,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1032572233, now seen corresponding path program 1 times [2024-06-27 21:26:27,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:27,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190950236] [2024-06-27 21:26:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:27,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:28,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:28,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190950236] [2024-06-27 21:26:28,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190950236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:28,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:28,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:26:28,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858721839] [2024-06-27 21:26:28,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:28,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:26:28,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:26:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:26:28,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:26:28,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:28,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:28,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:26:28,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:28,585 INFO L124 PetriNetUnfolderBase]: 1174/1819 cut-off events. [2024-06-27 21:26:28,586 INFO L125 PetriNetUnfolderBase]: For 2968/2972 co-relation queries the response was YES. [2024-06-27 21:26:28,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5730 conditions, 1819 events. 1174/1819 cut-off events. For 2968/2972 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8884 event pairs, 513 based on Foata normal form. 2/1793 useless extension candidates. Maximal degree in co-relation 5707. Up to 1719 conditions per place. [2024-06-27 21:26:28,595 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-27 21:26:28,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 481 flow [2024-06-27 21:26:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-27 21:26:28,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 21:26:28,596 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 265 flow. Second operand 6 states and 117 transitions. [2024-06-27 21:26:28,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 481 flow [2024-06-27 21:26:28,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 452 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:28,600 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 336 flow [2024-06-27 21:26:28,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-06-27 21:26:28,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-27 21:26:28,601 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 336 flow [2024-06-27 21:26:28,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:28,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:28,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:28,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:26:28,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:28,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash 599554585, now seen corresponding path program 1 times [2024-06-27 21:26:28,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:28,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853533434] [2024-06-27 21:26:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:28,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:29,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:29,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853533434] [2024-06-27 21:26:29,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853533434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:29,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:29,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:26:29,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828989123] [2024-06-27 21:26:29,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:29,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:26:29,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:26:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:26:29,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:26:29,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 336 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:29,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:29,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:26:29,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:29,545 INFO L124 PetriNetUnfolderBase]: 1263/1941 cut-off events. [2024-06-27 21:26:29,545 INFO L125 PetriNetUnfolderBase]: For 3886/3903 co-relation queries the response was YES. [2024-06-27 21:26:29,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6559 conditions, 1941 events. 1263/1941 cut-off events. For 3886/3903 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9379 event pairs, 500 based on Foata normal form. 16/1948 useless extension candidates. Maximal degree in co-relation 6532. Up to 1853 conditions per place. [2024-06-27 21:26:29,555 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 60 selfloop transitions, 13 changer transitions 0/82 dead transitions. [2024-06-27 21:26:29,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 82 transitions, 546 flow [2024-06-27 21:26:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 21:26:29,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-27 21:26:29,557 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 336 flow. Second operand 6 states and 121 transitions. [2024-06-27 21:26:29,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 82 transitions, 546 flow [2024-06-27 21:26:29,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 540 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 21:26:29,564 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 384 flow [2024-06-27 21:26:29,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=384, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-27 21:26:29,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-27 21:26:29,567 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 384 flow [2024-06-27 21:26:29,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:29,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:29,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:29,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:26:29,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:29,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2072934645, now seen corresponding path program 2 times [2024-06-27 21:26:29,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:29,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977172769] [2024-06-27 21:26:29,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:29,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:30,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977172769] [2024-06-27 21:26:30,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977172769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:30,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:30,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:26:30,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663486600] [2024-06-27 21:26:30,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:30,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:26:30,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:30,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:26:30,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:26:30,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:26:30,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 384 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:30,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:30,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:26:30,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:30,481 INFO L124 PetriNetUnfolderBase]: 1293/1987 cut-off events. [2024-06-27 21:26:30,481 INFO L125 PetriNetUnfolderBase]: For 5428/5446 co-relation queries the response was YES. [2024-06-27 21:26:30,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7322 conditions, 1987 events. 1293/1987 cut-off events. For 5428/5446 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9662 event pairs, 499 based on Foata normal form. 13/1987 useless extension candidates. Maximal degree in co-relation 7292. Up to 1865 conditions per place. [2024-06-27 21:26:30,491 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-27 21:26:30,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 624 flow [2024-06-27 21:26:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 21:26:30,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-27 21:26:30,493 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 384 flow. Second operand 6 states and 121 transitions. [2024-06-27 21:26:30,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 624 flow [2024-06-27 21:26:30,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 594 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:30,497 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 462 flow [2024-06-27 21:26:30,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=462, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-27 21:26:30,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-27 21:26:30,498 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 462 flow [2024-06-27 21:26:30,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:30,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:30,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:30,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:26:30,499 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:30,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2072943573, now seen corresponding path program 1 times [2024-06-27 21:26:30,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:30,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475640163] [2024-06-27 21:26:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:30,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:31,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:31,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475640163] [2024-06-27 21:26:31,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475640163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:31,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:31,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:31,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49373266] [2024-06-27 21:26:31,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:31,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:31,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:31,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:31,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:31,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:26:31,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 462 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:31,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:31,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:26:31,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:31,658 INFO L124 PetriNetUnfolderBase]: 1263/1955 cut-off events. [2024-06-27 21:26:31,659 INFO L125 PetriNetUnfolderBase]: For 7340/7364 co-relation queries the response was YES. [2024-06-27 21:26:31,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7606 conditions, 1955 events. 1263/1955 cut-off events. For 7340/7364 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9675 event pairs, 503 based on Foata normal form. 2/1925 useless extension candidates. Maximal degree in co-relation 7574. Up to 1822 conditions per place. [2024-06-27 21:26:31,677 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 64 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-27 21:26:31,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 680 flow [2024-06-27 21:26:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 21:26:31,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-27 21:26:31,678 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 462 flow. Second operand 7 states and 135 transitions. [2024-06-27 21:26:31,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 680 flow [2024-06-27 21:26:31,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 649 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 21:26:31,684 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 487 flow [2024-06-27 21:26:31,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=487, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-06-27 21:26:31,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-27 21:26:31,686 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 487 flow [2024-06-27 21:26:31,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:31,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:31,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:31,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:26:31,687 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:31,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1406323648, now seen corresponding path program 1 times [2024-06-27 21:26:31,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:31,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752864973] [2024-06-27 21:26:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:31,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:32,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:32,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752864973] [2024-06-27 21:26:32,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752864973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:32,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:32,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:32,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886422894] [2024-06-27 21:26:32,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:32,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:32,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:32,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:32,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:32,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 487 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 21:26:32,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:32,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:32,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:32,668 INFO L124 PetriNetUnfolderBase]: 1364/2085 cut-off events. [2024-06-27 21:26:32,668 INFO L125 PetriNetUnfolderBase]: For 8370/8370 co-relation queries the response was YES. [2024-06-27 21:26:32,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8518 conditions, 2085 events. 1364/2085 cut-off events. For 8370/8370 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10012 event pairs, 518 based on Foata normal form. 4/2086 useless extension candidates. Maximal degree in co-relation 8484. Up to 1981 conditions per place. [2024-06-27 21:26:32,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2024-06-27 21:26:32,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 105 transitions, 811 flow [2024-06-27 21:26:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 21:26:32,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-27 21:26:32,683 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 487 flow. Second operand 7 states and 134 transitions. [2024-06-27 21:26:32,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 105 transitions, 811 flow [2024-06-27 21:26:32,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 105 transitions, 779 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:32,689 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 573 flow [2024-06-27 21:26:32,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=573, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-27 21:26:32,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-27 21:26:32,690 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 573 flow [2024-06-27 21:26:32,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 21:26:32,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:32,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:32,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:26:32,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:32,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash -163527308, now seen corresponding path program 2 times [2024-06-27 21:26:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:32,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872040527] [2024-06-27 21:26:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:32,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:33,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:33,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872040527] [2024-06-27 21:26:33,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872040527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:33,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:33,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:33,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112933749] [2024-06-27 21:26:33,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:33,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:33,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:33,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:33,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:33,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 573 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 21:26:33,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:33,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:33,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:33,691 INFO L124 PetriNetUnfolderBase]: 1402/2140 cut-off events. [2024-06-27 21:26:33,692 INFO L125 PetriNetUnfolderBase]: For 10953/10953 co-relation queries the response was YES. [2024-06-27 21:26:33,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9311 conditions, 2140 events. 1402/2140 cut-off events. For 10953/10953 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10384 event pairs, 523 based on Foata normal form. 4/2138 useless extension candidates. Maximal degree in co-relation 9274. Up to 1953 conditions per place. [2024-06-27 21:26:33,704 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 82 selfloop transitions, 27 changer transitions 0/114 dead transitions. [2024-06-27 21:26:33,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 957 flow [2024-06-27 21:26:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 21:26:33,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-27 21:26:33,705 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 573 flow. Second operand 7 states and 137 transitions. [2024-06-27 21:26:33,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 957 flow [2024-06-27 21:26:33,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 114 transitions, 931 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 21:26:33,712 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 695 flow [2024-06-27 21:26:33,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=695, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2024-06-27 21:26:33,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-27 21:26:33,712 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 695 flow [2024-06-27 21:26:33,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 21:26:33,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:33,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:33,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:26:33,713 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:33,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:33,713 INFO L85 PathProgramCache]: Analyzing trace with hash -164724040, now seen corresponding path program 3 times [2024-06-27 21:26:33,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:33,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461980285] [2024-06-27 21:26:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:33,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:34,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:34,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461980285] [2024-06-27 21:26:34,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461980285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:34,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:34,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:34,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197347617] [2024-06-27 21:26:34,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:34,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:34,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:34,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:34,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:34,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 695 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 21:26:34,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:34,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:34,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:34,756 INFO L124 PetriNetUnfolderBase]: 1392/2131 cut-off events. [2024-06-27 21:26:34,757 INFO L125 PetriNetUnfolderBase]: For 13482/13482 co-relation queries the response was YES. [2024-06-27 21:26:34,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9856 conditions, 2131 events. 1392/2131 cut-off events. For 13482/13482 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10370 event pairs, 528 based on Foata normal form. 4/2129 useless extension candidates. Maximal degree in co-relation 9816. Up to 1945 conditions per place. [2024-06-27 21:26:34,772 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 81 selfloop transitions, 26 changer transitions 0/112 dead transitions. [2024-06-27 21:26:34,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 969 flow [2024-06-27 21:26:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:26:34,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 21:26:34,773 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 695 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:26:34,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 969 flow [2024-06-27 21:26:34,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 929 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 21:26:34,785 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 715 flow [2024-06-27 21:26:34,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=715, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-06-27 21:26:34,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-27 21:26:34,786 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 715 flow [2024-06-27 21:26:34,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 21:26:34,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:34,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:34,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:26:34,787 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:34,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:34,787 INFO L85 PathProgramCache]: Analyzing trace with hash -163257918, now seen corresponding path program 1 times [2024-06-27 21:26:34,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:34,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540648116] [2024-06-27 21:26:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:34,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:35,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:35,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540648116] [2024-06-27 21:26:35,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540648116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:35,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:35,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:35,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375839895] [2024-06-27 21:26:35,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:35,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:35,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:35,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:35,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:26:35,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 715 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) [2024-06-27 21:26:35,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:35,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:26:35,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:36,057 INFO L124 PetriNetUnfolderBase]: 1310/2042 cut-off events. [2024-06-27 21:26:36,058 INFO L125 PetriNetUnfolderBase]: For 15214/15246 co-relation queries the response was YES. [2024-06-27 21:26:36,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9576 conditions, 2042 events. 1310/2042 cut-off events. For 15214/15246 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10129 event pairs, 476 based on Foata normal form. 4/2019 useless extension candidates. Maximal degree in co-relation 9534. Up to 1870 conditions per place. [2024-06-27 21:26:36,070 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 87 selfloop transitions, 16 changer transitions 0/116 dead transitions. [2024-06-27 21:26:36,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 116 transitions, 997 flow [2024-06-27 21:26:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:26:36,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 21:26:36,072 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 715 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:26:36,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 116 transitions, 997 flow [2024-06-27 21:26:36,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 116 transitions, 913 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:36,082 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 690 flow [2024-06-27 21:26:36,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=690, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-06-27 21:26:36,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-27 21:26:36,083 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 690 flow [2024-06-27 21:26:36,083 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) [2024-06-27 21:26:36,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:36,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:36,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:26:36,083 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:36,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:36,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1404300244, now seen corresponding path program 1 times [2024-06-27 21:26:36,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:36,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538460888] [2024-06-27 21:26:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:36,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:36,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:36,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538460888] [2024-06-27 21:26:36,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538460888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:36,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:36,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:36,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163541646] [2024-06-27 21:26:36,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:36,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:36,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:36,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:36,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:36,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:26:36,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 690 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:36,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:36,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:26:36,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:37,315 INFO L124 PetriNetUnfolderBase]: 1332/2060 cut-off events. [2024-06-27 21:26:37,315 INFO L125 PetriNetUnfolderBase]: For 17799/17842 co-relation queries the response was YES. [2024-06-27 21:26:37,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9895 conditions, 2060 events. 1332/2060 cut-off events. For 17799/17842 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10173 event pairs, 464 based on Foata normal form. 21/2031 useless extension candidates. Maximal degree in co-relation 9854. Up to 1897 conditions per place. [2024-06-27 21:26:37,326 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 85 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-06-27 21:26:37,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 120 transitions, 990 flow [2024-06-27 21:26:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:26:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:26:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 21:26:37,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-27 21:26:37,328 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 690 flow. Second operand 7 states and 141 transitions. [2024-06-27 21:26:37,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 120 transitions, 990 flow [2024-06-27 21:26:37,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 120 transitions, 949 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:37,338 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 729 flow [2024-06-27 21:26:37,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=729, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-06-27 21:26:37,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-27 21:26:37,338 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 729 flow [2024-06-27 21:26:37,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:37,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:37,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:37,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:26:37,339 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:37,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:37,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1409068788, now seen corresponding path program 1 times [2024-06-27 21:26:37,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:37,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055703417] [2024-06-27 21:26:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:37,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:38,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:38,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055703417] [2024-06-27 21:26:38,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055703417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:38,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:38,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:38,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581844456] [2024-06-27 21:26:38,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:38,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:38,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:38,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:38,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 729 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:38,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:38,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:38,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:38,682 INFO L124 PetriNetUnfolderBase]: 1387/2129 cut-off events. [2024-06-27 21:26:38,683 INFO L125 PetriNetUnfolderBase]: For 18965/18965 co-relation queries the response was YES. [2024-06-27 21:26:38,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10407 conditions, 2129 events. 1387/2129 cut-off events. For 18965/18965 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10299 event pairs, 484 based on Foata normal form. 2/2128 useless extension candidates. Maximal degree in co-relation 10365. Up to 2029 conditions per place. [2024-06-27 21:26:38,696 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 108 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-06-27 21:26:38,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 130 transitions, 1099 flow [2024-06-27 21:26:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:26:38,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:26:38,697 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 729 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:26:38,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 130 transitions, 1099 flow [2024-06-27 21:26:38,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 130 transitions, 1045 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:38,710 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 793 flow [2024-06-27 21:26:38,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=793, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2024-06-27 21:26:38,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-27 21:26:38,710 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 793 flow [2024-06-27 21:26:38,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:38,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:38,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:38,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:26:38,711 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:38,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:38,711 INFO L85 PathProgramCache]: Analyzing trace with hash -766334954, now seen corresponding path program 2 times [2024-06-27 21:26:38,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:38,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311675370] [2024-06-27 21:26:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:38,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:39,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:39,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311675370] [2024-06-27 21:26:39,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311675370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:39,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:39,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:39,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100773891] [2024-06-27 21:26:39,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:39,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:39,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:39,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:39,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:39,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 793 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:39,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:39,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:39,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:39,998 INFO L124 PetriNetUnfolderBase]: 1409/2161 cut-off events. [2024-06-27 21:26:39,998 INFO L125 PetriNetUnfolderBase]: For 21866/21866 co-relation queries the response was YES. [2024-06-27 21:26:40,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11006 conditions, 2161 events. 1409/2161 cut-off events. For 21866/21866 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10513 event pairs, 484 based on Foata normal form. 4/2159 useless extension candidates. Maximal degree in co-relation 10961. Up to 1952 conditions per place. [2024-06-27 21:26:40,013 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 94 selfloop transitions, 35 changer transitions 0/134 dead transitions. [2024-06-27 21:26:40,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 134 transitions, 1163 flow [2024-06-27 21:26:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:40,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:26:40,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 21:26:40,015 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 793 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:26:40,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 134 transitions, 1163 flow [2024-06-27 21:26:40,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 134 transitions, 1139 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:40,031 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 892 flow [2024-06-27 21:26:40,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=892, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-27 21:26:40,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-27 21:26:40,033 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 892 flow [2024-06-27 21:26:40,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:40,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:40,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:40,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:26:40,033 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:40,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash -766038284, now seen corresponding path program 3 times [2024-06-27 21:26:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:40,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175465561] [2024-06-27 21:26:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:40,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:40,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:40,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175465561] [2024-06-27 21:26:40,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175465561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:40,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:40,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:40,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262727827] [2024-06-27 21:26:40,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:40,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:40,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:40,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:40,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:40,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 892 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:40,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:40,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:40,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:41,358 INFO L124 PetriNetUnfolderBase]: 1436/2200 cut-off events. [2024-06-27 21:26:41,358 INFO L125 PetriNetUnfolderBase]: For 25695/25695 co-relation queries the response was YES. [2024-06-27 21:26:41,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11966 conditions, 2200 events. 1436/2200 cut-off events. For 25695/25695 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10707 event pairs, 484 based on Foata normal form. 2/2196 useless extension candidates. Maximal degree in co-relation 11919. Up to 1937 conditions per place. [2024-06-27 21:26:41,372 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 94 selfloop transitions, 48 changer transitions 0/147 dead transitions. [2024-06-27 21:26:41,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 147 transitions, 1404 flow [2024-06-27 21:26:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:41,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 21:26:41,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 21:26:41,374 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 892 flow. Second operand 9 states and 174 transitions. [2024-06-27 21:26:41,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 147 transitions, 1404 flow [2024-06-27 21:26:41,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 147 transitions, 1311 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:41,390 INFO L231 Difference]: Finished difference. Result has 105 places, 115 transitions, 1004 flow [2024-06-27 21:26:41,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1004, PETRI_PLACES=105, PETRI_TRANSITIONS=115} [2024-06-27 21:26:41,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-27 21:26:41,390 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 115 transitions, 1004 flow [2024-06-27 21:26:41,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:41,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:41,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:41,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:26:41,391 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:41,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:41,391 INFO L85 PathProgramCache]: Analyzing trace with hash -774609164, now seen corresponding path program 4 times [2024-06-27 21:26:41,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:41,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141181304] [2024-06-27 21:26:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:41,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:42,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:42,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141181304] [2024-06-27 21:26:42,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141181304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:42,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:42,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:42,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358128560] [2024-06-27 21:26:42,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:42,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:42,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:42,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:42,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:42,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 115 transitions, 1004 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:42,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:42,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:42,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:42,635 INFO L124 PetriNetUnfolderBase]: 1442/2204 cut-off events. [2024-06-27 21:26:42,635 INFO L125 PetriNetUnfolderBase]: For 30398/30398 co-relation queries the response was YES. [2024-06-27 21:26:42,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12779 conditions, 2204 events. 1442/2204 cut-off events. For 30398/30398 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10679 event pairs, 484 based on Foata normal form. 4/2202 useless extension candidates. Maximal degree in co-relation 12730. Up to 2000 conditions per place. [2024-06-27 21:26:42,651 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 105 selfloop transitions, 33 changer transitions 0/143 dead transitions. [2024-06-27 21:26:42,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 143 transitions, 1407 flow [2024-06-27 21:26:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 21:26:42,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-27 21:26:42,653 INFO L175 Difference]: Start difference. First operand has 105 places, 115 transitions, 1004 flow. Second operand 8 states and 154 transitions. [2024-06-27 21:26:42,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 143 transitions, 1407 flow [2024-06-27 21:26:42,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 143 transitions, 1342 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:42,675 INFO L231 Difference]: Finished difference. Result has 108 places, 118 transitions, 1065 flow [2024-06-27 21:26:42,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1065, PETRI_PLACES=108, PETRI_TRANSITIONS=118} [2024-06-27 21:26:42,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-27 21:26:42,676 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 118 transitions, 1065 flow [2024-06-27 21:26:42,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:42,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:42,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:42,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:26:42,677 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:42,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:42,677 INFO L85 PathProgramCache]: Analyzing trace with hash -595566717, now seen corresponding path program 1 times [2024-06-27 21:26:42,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:42,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227472813] [2024-06-27 21:26:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:42,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:43,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:43,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227472813] [2024-06-27 21:26:43,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227472813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:43,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:43,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:43,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190708118] [2024-06-27 21:26:43,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:43,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:43,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:43,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:43,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:43,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:43,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 1065 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:43,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:43,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:43,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:44,073 INFO L124 PetriNetUnfolderBase]: 1500/2310 cut-off events. [2024-06-27 21:26:44,073 INFO L125 PetriNetUnfolderBase]: For 32941/32941 co-relation queries the response was YES. [2024-06-27 21:26:44,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13553 conditions, 2310 events. 1500/2310 cut-off events. For 32941/32941 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11275 event pairs, 480 based on Foata normal form. 2/2309 useless extension candidates. Maximal degree in co-relation 13502. Up to 2168 conditions per place. [2024-06-27 21:26:44,088 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 136 selfloop transitions, 27 changer transitions 0/168 dead transitions. [2024-06-27 21:26:44,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 168 transitions, 1665 flow [2024-06-27 21:26:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:26:44,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 21:26:44,093 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 1065 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:26:44,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 168 transitions, 1665 flow [2024-06-27 21:26:44,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 168 transitions, 1568 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:44,117 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1264 flow [2024-06-27 21:26:44,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1264, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-27 21:26:44,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-27 21:26:44,118 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1264 flow [2024-06-27 21:26:44,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:44,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:44,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:44,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:26:44,118 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:44,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:44,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1585474111, now seen corresponding path program 2 times [2024-06-27 21:26:44,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:44,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484313657] [2024-06-27 21:26:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:44,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:44,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:44,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484313657] [2024-06-27 21:26:44,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484313657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:44,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:44,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:44,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326468311] [2024-06-27 21:26:44,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:44,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:44,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:45,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:45,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1264 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:45,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:45,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:45,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:45,515 INFO L124 PetriNetUnfolderBase]: 1557/2398 cut-off events. [2024-06-27 21:26:45,515 INFO L125 PetriNetUnfolderBase]: For 38040/38040 co-relation queries the response was YES. [2024-06-27 21:26:45,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14567 conditions, 2398 events. 1557/2398 cut-off events. For 38040/38040 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11790 event pairs, 385 based on Foata normal form. 2/2389 useless extension candidates. Maximal degree in co-relation 14512. Up to 2228 conditions per place. [2024-06-27 21:26:45,530 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 138 selfloop transitions, 43 changer transitions 0/186 dead transitions. [2024-06-27 21:26:45,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 186 transitions, 2019 flow [2024-06-27 21:26:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:26:45,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 21:26:45,532 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1264 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:26:45,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 186 transitions, 2019 flow [2024-06-27 21:26:45,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 186 transitions, 1868 flow, removed 72 selfloop flow, removed 2 redundant places. [2024-06-27 21:26:45,570 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 1595 flow [2024-06-27 21:26:45,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1595, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-06-27 21:26:45,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 21:26:45,571 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 1595 flow [2024-06-27 21:26:45,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:45,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:45,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:45,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:26:45,573 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:45,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:45,573 INFO L85 PathProgramCache]: Analyzing trace with hash 731460227, now seen corresponding path program 1 times [2024-06-27 21:26:45,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:45,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061058095] [2024-06-27 21:26:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:45,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:46,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:46,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061058095] [2024-06-27 21:26:46,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061058095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:46,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:46,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:46,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650571159] [2024-06-27 21:26:46,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:46,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:46,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:46,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:46,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:46,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:46,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 1595 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:46,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:46,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:46,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:47,033 INFO L124 PetriNetUnfolderBase]: 1574/2430 cut-off events. [2024-06-27 21:26:47,033 INFO L125 PetriNetUnfolderBase]: For 43068/43068 co-relation queries the response was YES. [2024-06-27 21:26:47,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15266 conditions, 2430 events. 1574/2430 cut-off events. For 43068/43068 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11978 event pairs, 382 based on Foata normal form. 4/2431 useless extension candidates. Maximal degree in co-relation 15205. Up to 2271 conditions per place. [2024-06-27 21:26:47,048 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 27 changer transitions 0/196 dead transitions. [2024-06-27 21:26:47,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 196 transitions, 2109 flow [2024-06-27 21:26:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:26:47,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-27 21:26:47,049 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 1595 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:26:47,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 196 transitions, 2109 flow [2024-06-27 21:26:47,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 196 transitions, 2051 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-27 21:26:47,084 INFO L231 Difference]: Finished difference. Result has 133 places, 165 transitions, 1632 flow [2024-06-27 21:26:47,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1632, PETRI_PLACES=133, PETRI_TRANSITIONS=165} [2024-06-27 21:26:47,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-27 21:26:47,085 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 165 transitions, 1632 flow [2024-06-27 21:26:47,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:47,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:47,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:47,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:26:47,090 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:47,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:47,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2013420961, now seen corresponding path program 2 times [2024-06-27 21:26:47,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:47,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063417084] [2024-06-27 21:26:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:47,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:48,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:48,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063417084] [2024-06-27 21:26:48,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063417084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:48,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:48,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:48,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821113257] [2024-06-27 21:26:48,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:48,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:48,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:48,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:48,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:48,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 165 transitions, 1632 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:48,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:48,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:48,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:48,647 INFO L124 PetriNetUnfolderBase]: 1666/2574 cut-off events. [2024-06-27 21:26:48,648 INFO L125 PetriNetUnfolderBase]: For 52178/52178 co-relation queries the response was YES. [2024-06-27 21:26:48,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16434 conditions, 2574 events. 1666/2574 cut-off events. For 52178/52178 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12798 event pairs, 426 based on Foata normal form. 24/2588 useless extension candidates. Maximal degree in co-relation 16370. Up to 2194 conditions per place. [2024-06-27 21:26:48,663 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 154 selfloop transitions, 44 changer transitions 0/203 dead transitions. [2024-06-27 21:26:48,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 203 transitions, 2246 flow [2024-06-27 21:26:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 21:26:48,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 21:26:48,664 INFO L175 Difference]: Start difference. First operand has 133 places, 165 transitions, 1632 flow. Second operand 9 states and 174 transitions. [2024-06-27 21:26:48,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 203 transitions, 2246 flow [2024-06-27 21:26:48,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 203 transitions, 2169 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:48,698 INFO L231 Difference]: Finished difference. Result has 135 places, 167 transitions, 1690 flow [2024-06-27 21:26:48,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1690, PETRI_PLACES=135, PETRI_TRANSITIONS=167} [2024-06-27 21:26:48,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-27 21:26:48,699 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 167 transitions, 1690 flow [2024-06-27 21:26:48,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:48,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:48,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:48,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:26:48,701 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:48,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:48,701 INFO L85 PathProgramCache]: Analyzing trace with hash 879708119, now seen corresponding path program 3 times [2024-06-27 21:26:48,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:48,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912050944] [2024-06-27 21:26:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:48,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:49,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:49,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912050944] [2024-06-27 21:26:49,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912050944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:49,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:49,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:49,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839540229] [2024-06-27 21:26:49,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:49,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:49,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:49,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:49,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:49,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:49,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 167 transitions, 1690 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:49,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:49,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:49,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:50,273 INFO L124 PetriNetUnfolderBase]: 1683/2606 cut-off events. [2024-06-27 21:26:50,273 INFO L125 PetriNetUnfolderBase]: For 53590/53590 co-relation queries the response was YES. [2024-06-27 21:26:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17025 conditions, 2606 events. 1683/2606 cut-off events. For 53590/53590 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13005 event pairs, 431 based on Foata normal form. 4/2600 useless extension candidates. Maximal degree in co-relation 16960. Up to 2147 conditions per place. [2024-06-27 21:26:50,292 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 144 selfloop transitions, 62 changer transitions 0/211 dead transitions. [2024-06-27 21:26:50,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 211 transitions, 2430 flow [2024-06-27 21:26:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 21:26:50,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 21:26:50,293 INFO L175 Difference]: Start difference. First operand has 135 places, 167 transitions, 1690 flow. Second operand 10 states and 195 transitions. [2024-06-27 21:26:50,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 211 transitions, 2430 flow [2024-06-27 21:26:50,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 211 transitions, 2331 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:50,329 INFO L231 Difference]: Finished difference. Result has 138 places, 169 transitions, 1769 flow [2024-06-27 21:26:50,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1769, PETRI_PLACES=138, PETRI_TRANSITIONS=169} [2024-06-27 21:26:50,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-27 21:26:50,330 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 169 transitions, 1769 flow [2024-06-27 21:26:50,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:50,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:50,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:50,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:26:50,330 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:50,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:50,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2022944161, now seen corresponding path program 4 times [2024-06-27 21:26:50,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:50,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506522021] [2024-06-27 21:26:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:50,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:51,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:51,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506522021] [2024-06-27 21:26:51,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506522021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:51,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:51,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:51,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717287086] [2024-06-27 21:26:51,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:51,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:51,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:51,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 169 transitions, 1769 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:51,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:51,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:51,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:51,781 INFO L124 PetriNetUnfolderBase]: 1811/2814 cut-off events. [2024-06-27 21:26:51,782 INFO L125 PetriNetUnfolderBase]: For 65053/65053 co-relation queries the response was YES. [2024-06-27 21:26:51,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19005 conditions, 2814 events. 1811/2814 cut-off events. For 65053/65053 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14381 event pairs, 424 based on Foata normal form. 4/2808 useless extension candidates. Maximal degree in co-relation 18939. Up to 2087 conditions per place. [2024-06-27 21:26:51,803 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 140 selfloop transitions, 68 changer transitions 0/213 dead transitions. [2024-06-27 21:26:51,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 213 transitions, 2633 flow [2024-06-27 21:26:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 21:26:51,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-27 21:26:51,804 INFO L175 Difference]: Start difference. First operand has 138 places, 169 transitions, 1769 flow. Second operand 9 states and 179 transitions. [2024-06-27 21:26:51,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 213 transitions, 2633 flow [2024-06-27 21:26:51,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 2473 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 21:26:51,856 INFO L231 Difference]: Finished difference. Result has 140 places, 173 transitions, 1876 flow [2024-06-27 21:26:51,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1876, PETRI_PLACES=140, PETRI_TRANSITIONS=173} [2024-06-27 21:26:51,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-27 21:26:51,857 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 173 transitions, 1876 flow [2024-06-27 21:26:51,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:51,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:51,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:51,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:26:51,857 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:51,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1756920451, now seen corresponding path program 5 times [2024-06-27 21:26:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:51,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746922873] [2024-06-27 21:26:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:52,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:52,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746922873] [2024-06-27 21:26:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746922873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:52,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:52,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:52,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013649241] [2024-06-27 21:26:52,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:52,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:52,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:52,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:52,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 173 transitions, 1876 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:52,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:52,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:52,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:53,496 INFO L124 PetriNetUnfolderBase]: 1878/2927 cut-off events. [2024-06-27 21:26:53,496 INFO L125 PetriNetUnfolderBase]: For 70282/70282 co-relation queries the response was YES. [2024-06-27 21:26:53,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19775 conditions, 2927 events. 1878/2927 cut-off events. For 70282/70282 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15153 event pairs, 471 based on Foata normal form. 24/2941 useless extension candidates. Maximal degree in co-relation 19707. Up to 2542 conditions per place. [2024-06-27 21:26:53,518 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 42 changer transitions 0/209 dead transitions. [2024-06-27 21:26:53,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 209 transitions, 2491 flow [2024-06-27 21:26:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:26:53,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-27 21:26:53,519 INFO L175 Difference]: Start difference. First operand has 140 places, 173 transitions, 1876 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:26:53,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 209 transitions, 2491 flow [2024-06-27 21:26:53,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 209 transitions, 2375 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:53,571 INFO L231 Difference]: Finished difference. Result has 144 places, 174 transitions, 1880 flow [2024-06-27 21:26:53,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1880, PETRI_PLACES=144, PETRI_TRANSITIONS=174} [2024-06-27 21:26:53,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-27 21:26:53,572 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 174 transitions, 1880 flow [2024-06-27 21:26:53,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:53,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:53,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:53,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:26:53,572 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:53,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:53,572 INFO L85 PathProgramCache]: Analyzing trace with hash -398631455, now seen corresponding path program 3 times [2024-06-27 21:26:53,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:53,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590924667] [2024-06-27 21:26:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:53,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:54,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:54,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590924667] [2024-06-27 21:26:54,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590924667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:54,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:54,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:54,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636681292] [2024-06-27 21:26:54,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:54,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:54,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:54,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:54,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:26:54,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 174 transitions, 1880 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:54,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:54,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:26:54,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:54,938 INFO L124 PetriNetUnfolderBase]: 1919/2994 cut-off events. [2024-06-27 21:26:54,938 INFO L125 PetriNetUnfolderBase]: For 68761/68761 co-relation queries the response was YES. [2024-06-27 21:26:54,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20213 conditions, 2994 events. 1919/2994 cut-off events. For 68761/68761 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15668 event pairs, 466 based on Foata normal form. 4/2995 useless extension candidates. Maximal degree in co-relation 20143. Up to 2790 conditions per place. [2024-06-27 21:26:54,962 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 170 selfloop transitions, 54 changer transitions 0/229 dead transitions. [2024-06-27 21:26:54,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 229 transitions, 2674 flow [2024-06-27 21:26:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:26:54,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:26:54,964 INFO L175 Difference]: Start difference. First operand has 144 places, 174 transitions, 1880 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:26:54,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 229 transitions, 2674 flow [2024-06-27 21:26:55,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 229 transitions, 2583 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:55,021 INFO L231 Difference]: Finished difference. Result has 148 places, 196 transitions, 2206 flow [2024-06-27 21:26:55,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2206, PETRI_PLACES=148, PETRI_TRANSITIONS=196} [2024-06-27 21:26:55,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-27 21:26:55,021 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 196 transitions, 2206 flow [2024-06-27 21:26:55,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:55,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:55,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:55,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:26:55,022 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:55,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:55,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1193751219, now seen corresponding path program 1 times [2024-06-27 21:26:55,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:55,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017143199] [2024-06-27 21:26:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:55,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:55,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:55,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017143199] [2024-06-27 21:26:55,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017143199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:55,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:55,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:55,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100375478] [2024-06-27 21:26:55,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:55,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:55,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:55,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:55,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:26:55,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 196 transitions, 2206 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) [2024-06-27 21:26:55,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:55,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:26:55,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:56,471 INFO L124 PetriNetUnfolderBase]: 1846/2925 cut-off events. [2024-06-27 21:26:56,471 INFO L125 PetriNetUnfolderBase]: For 77244/77282 co-relation queries the response was YES. [2024-06-27 21:26:56,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20302 conditions, 2925 events. 1846/2925 cut-off events. For 77244/77282 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15755 event pairs, 404 based on Foata normal form. 7/2882 useless extension candidates. Maximal degree in co-relation 20229. Up to 2598 conditions per place. [2024-06-27 21:26:56,494 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 146 selfloop transitions, 30 changer transitions 0/226 dead transitions. [2024-06-27 21:26:56,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 226 transitions, 2700 flow [2024-06-27 21:26:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:26:56,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 21:26:56,495 INFO L175 Difference]: Start difference. First operand has 148 places, 196 transitions, 2206 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:26:56,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 226 transitions, 2700 flow [2024-06-27 21:26:56,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 226 transitions, 2621 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:56,559 INFO L231 Difference]: Finished difference. Result has 154 places, 201 transitions, 2268 flow [2024-06-27 21:26:56,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2268, PETRI_PLACES=154, PETRI_TRANSITIONS=201} [2024-06-27 21:26:56,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-27 21:26:56,560 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 201 transitions, 2268 flow [2024-06-27 21:26:56,560 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) [2024-06-27 21:26:56,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:56,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:56,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:26:56,560 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:56,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1023048789, now seen corresponding path program 2 times [2024-06-27 21:26:56,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:56,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764633092] [2024-06-27 21:26:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:56,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:57,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:57,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764633092] [2024-06-27 21:26:57,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764633092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:57,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:57,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:57,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459202311] [2024-06-27 21:26:57,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:57,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:57,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:57,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:57,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:57,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:26:57,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 201 transitions, 2268 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) [2024-06-27 21:26:57,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:57,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:26:57,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:58,052 INFO L124 PetriNetUnfolderBase]: 1871/2973 cut-off events. [2024-06-27 21:26:58,052 INFO L125 PetriNetUnfolderBase]: For 84107/84175 co-relation queries the response was YES. [2024-06-27 21:26:58,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21023 conditions, 2973 events. 1871/2973 cut-off events. For 84107/84175 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16172 event pairs, 406 based on Foata normal form. 5/2928 useless extension candidates. Maximal degree in co-relation 20947. Up to 2568 conditions per place. [2024-06-27 21:26:58,073 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 129 selfloop transitions, 51 changer transitions 0/230 dead transitions. [2024-06-27 21:26:58,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 230 transitions, 2744 flow [2024-06-27 21:26:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:26:58,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-27 21:26:58,074 INFO L175 Difference]: Start difference. First operand has 154 places, 201 transitions, 2268 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:26:58,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 230 transitions, 2744 flow [2024-06-27 21:26:58,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 230 transitions, 2656 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:58,130 INFO L231 Difference]: Finished difference. Result has 157 places, 203 transitions, 2325 flow [2024-06-27 21:26:58,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2325, PETRI_PLACES=157, PETRI_TRANSITIONS=203} [2024-06-27 21:26:58,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-27 21:26:58,131 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 203 transitions, 2325 flow [2024-06-27 21:26:58,131 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) [2024-06-27 21:26:58,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:58,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:58,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:26:58,131 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:58,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash 909963955, now seen corresponding path program 3 times [2024-06-27 21:26:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:58,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31131544] [2024-06-27 21:26:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:58,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:58,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:58,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31131544] [2024-06-27 21:26:58,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31131544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:58,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:58,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:26:58,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804921003] [2024-06-27 21:26:58,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:58,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:26:58,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:58,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:26:58,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:26:58,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:26:58,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 203 transitions, 2325 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) [2024-06-27 21:26:58,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:58,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:26:58,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:59,466 INFO L124 PetriNetUnfolderBase]: 1878/2981 cut-off events. [2024-06-27 21:26:59,466 INFO L125 PetriNetUnfolderBase]: For 89908/89948 co-relation queries the response was YES. [2024-06-27 21:26:59,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21427 conditions, 2981 events. 1878/2981 cut-off events. For 89908/89948 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16137 event pairs, 391 based on Foata normal form. 10/2939 useless extension candidates. Maximal degree in co-relation 21350. Up to 2584 conditions per place. [2024-06-27 21:26:59,492 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 145 selfloop transitions, 38 changer transitions 0/233 dead transitions. [2024-06-27 21:26:59,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 233 transitions, 2813 flow [2024-06-27 21:26:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:26:59,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-27 21:26:59,493 INFO L175 Difference]: Start difference. First operand has 157 places, 203 transitions, 2325 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:26:59,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 233 transitions, 2813 flow [2024-06-27 21:26:59,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 233 transitions, 2698 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:59,573 INFO L231 Difference]: Finished difference. Result has 159 places, 205 transitions, 2327 flow [2024-06-27 21:26:59,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2327, PETRI_PLACES=159, PETRI_TRANSITIONS=205} [2024-06-27 21:26:59,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-27 21:26:59,573 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 205 transitions, 2327 flow [2024-06-27 21:26:59,573 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) [2024-06-27 21:26:59,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:59,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:59,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:26:59,574 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:59,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1624126153, now seen corresponding path program 1 times [2024-06-27 21:26:59,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:59,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132467984] [2024-06-27 21:26:59,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:59,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:00,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:00,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132467984] [2024-06-27 21:27:00,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132467984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:00,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:00,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:00,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103548137] [2024-06-27 21:27:00,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:00,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:00,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:00,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:00,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:00,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 205 transitions, 2327 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:00,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:00,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:00,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:01,384 INFO L124 PetriNetUnfolderBase]: 2016/3149 cut-off events. [2024-06-27 21:27:01,385 INFO L125 PetriNetUnfolderBase]: For 91121/91121 co-relation queries the response was YES. [2024-06-27 21:27:01,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22765 conditions, 3149 events. 2016/3149 cut-off events. For 91121/91121 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16643 event pairs, 452 based on Foata normal form. 2/3148 useless extension candidates. Maximal degree in co-relation 22687. Up to 2970 conditions per place. [2024-06-27 21:27:01,412 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 33 changer transitions 0/239 dead transitions. [2024-06-27 21:27:01,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 239 transitions, 2969 flow [2024-06-27 21:27:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:27:01,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:27:01,413 INFO L175 Difference]: Start difference. First operand has 159 places, 205 transitions, 2327 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:27:01,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 239 transitions, 2969 flow [2024-06-27 21:27:01,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 239 transitions, 2870 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:01,482 INFO L231 Difference]: Finished difference. Result has 162 places, 211 transitions, 2386 flow [2024-06-27 21:27:01,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2386, PETRI_PLACES=162, PETRI_TRANSITIONS=211} [2024-06-27 21:27:01,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-27 21:27:01,483 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 211 transitions, 2386 flow [2024-06-27 21:27:01,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:01,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:01,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:01,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:27:01,484 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:01,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1884548483, now seen corresponding path program 2 times [2024-06-27 21:27:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:01,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226471062] [2024-06-27 21:27:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:02,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:02,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226471062] [2024-06-27 21:27:02,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226471062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:02,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:02,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:02,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93312802] [2024-06-27 21:27:02,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:02,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:02,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:02,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:02,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 211 transitions, 2386 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:02,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:02,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:02,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:03,068 INFO L124 PetriNetUnfolderBase]: 2011/3142 cut-off events. [2024-06-27 21:27:03,068 INFO L125 PetriNetUnfolderBase]: For 94599/94599 co-relation queries the response was YES. [2024-06-27 21:27:03,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22735 conditions, 3142 events. 2011/3142 cut-off events. For 94599/94599 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16583 event pairs, 491 based on Foata normal form. 2/3141 useless extension candidates. Maximal degree in co-relation 22656. Up to 2963 conditions per place. [2024-06-27 21:27:03,094 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 33 changer transitions 0/239 dead transitions. [2024-06-27 21:27:03,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 239 transitions, 2950 flow [2024-06-27 21:27:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:27:03,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:27:03,095 INFO L175 Difference]: Start difference. First operand has 162 places, 211 transitions, 2386 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:27:03,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 239 transitions, 2950 flow [2024-06-27 21:27:03,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 239 transitions, 2828 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:03,183 INFO L231 Difference]: Finished difference. Result has 164 places, 211 transitions, 2338 flow [2024-06-27 21:27:03,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2338, PETRI_PLACES=164, PETRI_TRANSITIONS=211} [2024-06-27 21:27:03,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-27 21:27:03,184 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 211 transitions, 2338 flow [2024-06-27 21:27:03,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:03,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:03,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:03,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:27:03,184 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:03,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:03,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1200422419, now seen corresponding path program 3 times [2024-06-27 21:27:03,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:03,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72060446] [2024-06-27 21:27:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:03,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:04,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72060446] [2024-06-27 21:27:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72060446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:04,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:04,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423761291] [2024-06-27 21:27:04,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:04,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:04,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:04,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 211 transitions, 2338 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:04,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:04,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:04,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:04,890 INFO L124 PetriNetUnfolderBase]: 2038/3192 cut-off events. [2024-06-27 21:27:04,890 INFO L125 PetriNetUnfolderBase]: For 100550/100550 co-relation queries the response was YES. [2024-06-27 21:27:04,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23209 conditions, 3192 events. 2038/3192 cut-off events. For 100550/100550 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17040 event pairs, 456 based on Foata normal form. 2/3191 useless extension candidates. Maximal degree in co-relation 23131. Up to 2817 conditions per place. [2024-06-27 21:27:04,916 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 151 selfloop transitions, 100 changer transitions 0/256 dead transitions. [2024-06-27 21:27:04,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 256 transitions, 3236 flow [2024-06-27 21:27:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 21:27:04,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 21:27:04,917 INFO L175 Difference]: Start difference. First operand has 164 places, 211 transitions, 2338 flow. Second operand 10 states and 191 transitions. [2024-06-27 21:27:04,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 256 transitions, 3236 flow [2024-06-27 21:27:04,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 256 transitions, 3127 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:04,999 INFO L231 Difference]: Finished difference. Result has 167 places, 220 transitions, 2637 flow [2024-06-27 21:27:04,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2637, PETRI_PLACES=167, PETRI_TRANSITIONS=220} [2024-06-27 21:27:05,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-27 21:27:05,000 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 220 transitions, 2637 flow [2024-06-27 21:27:05,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:05,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:05,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:05,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:27:05,000 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:05,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:05,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1905056457, now seen corresponding path program 4 times [2024-06-27 21:27:05,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:05,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111516219] [2024-06-27 21:27:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:05,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:06,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:06,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111516219] [2024-06-27 21:27:06,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111516219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:06,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:06,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:06,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141450024] [2024-06-27 21:27:06,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:06,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:06,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:06,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:06,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:06,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 220 transitions, 2637 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:06,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:06,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:06,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:07,007 INFO L124 PetriNetUnfolderBase]: 2033/3188 cut-off events. [2024-06-27 21:27:07,007 INFO L125 PetriNetUnfolderBase]: For 109023/109023 co-relation queries the response was YES. [2024-06-27 21:27:07,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24005 conditions, 3188 events. 2033/3188 cut-off events. For 109023/109023 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16951 event pairs, 427 based on Foata normal form. 2/3187 useless extension candidates. Maximal degree in co-relation 23925. Up to 2901 conditions per place. [2024-06-27 21:27:07,035 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 170 selfloop transitions, 75 changer transitions 0/250 dead transitions. [2024-06-27 21:27:07,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 250 transitions, 3229 flow [2024-06-27 21:27:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:27:07,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 21:27:07,036 INFO L175 Difference]: Start difference. First operand has 167 places, 220 transitions, 2637 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:27:07,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 250 transitions, 3229 flow [2024-06-27 21:27:07,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 250 transitions, 3041 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:07,155 INFO L231 Difference]: Finished difference. Result has 171 places, 220 transitions, 2613 flow [2024-06-27 21:27:07,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2613, PETRI_PLACES=171, PETRI_TRANSITIONS=220} [2024-06-27 21:27:07,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-27 21:27:07,156 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 220 transitions, 2613 flow [2024-06-27 21:27:07,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:07,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:07,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:07,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:27:07,156 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:07,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash 826222233, now seen corresponding path program 1 times [2024-06-27 21:27:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:07,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17930877] [2024-06-27 21:27:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:07,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:07,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:07,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17930877] [2024-06-27 21:27:07,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17930877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:07,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:07,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:07,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263796430] [2024-06-27 21:27:07,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:07,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:07,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:07,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:07,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:07,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:07,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 220 transitions, 2613 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-27 21:27:07,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:07,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:07,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:08,463 INFO L124 PetriNetUnfolderBase]: 2063/3235 cut-off events. [2024-06-27 21:27:08,463 INFO L125 PetriNetUnfolderBase]: For 114301/114301 co-relation queries the response was YES. [2024-06-27 21:27:08,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24359 conditions, 3235 events. 2063/3235 cut-off events. For 114301/114301 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17256 event pairs, 438 based on Foata normal form. 4/3236 useless extension candidates. Maximal degree in co-relation 24277. Up to 2978 conditions per place. [2024-06-27 21:27:08,491 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 195 selfloop transitions, 51 changer transitions 0/251 dead transitions. [2024-06-27 21:27:08,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 251 transitions, 3396 flow [2024-06-27 21:27:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:27:08,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 21:27:08,493 INFO L175 Difference]: Start difference. First operand has 171 places, 220 transitions, 2613 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:27:08,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 251 transitions, 3396 flow [2024-06-27 21:27:08,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 251 transitions, 3202 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:08,604 INFO L231 Difference]: Finished difference. Result has 171 places, 231 transitions, 2675 flow [2024-06-27 21:27:08,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2675, PETRI_PLACES=171, PETRI_TRANSITIONS=231} [2024-06-27 21:27:08,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-27 21:27:08,605 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 231 transitions, 2675 flow [2024-06-27 21:27:08,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-27 21:27:08,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:08,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:08,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:27:08,605 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:08,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1376720205, now seen corresponding path program 4 times [2024-06-27 21:27:08,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:08,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321313233] [2024-06-27 21:27:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:08,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:09,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:09,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321313233] [2024-06-27 21:27:09,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321313233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:09,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:09,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:09,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986007671] [2024-06-27 21:27:09,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:09,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:09,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:09,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:09,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:09,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:27:09,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 231 transitions, 2675 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) [2024-06-27 21:27:09,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:09,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:27:09,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:10,061 INFO L124 PetriNetUnfolderBase]: 1932/3083 cut-off events. [2024-06-27 21:27:10,061 INFO L125 PetriNetUnfolderBase]: For 124168/124205 co-relation queries the response was YES. [2024-06-27 21:27:10,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23559 conditions, 3083 events. 1932/3083 cut-off events. For 124168/124205 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16969 event pairs, 403 based on Foata normal form. 8/3039 useless extension candidates. Maximal degree in co-relation 23475. Up to 2694 conditions per place. [2024-06-27 21:27:10,091 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 41 changer transitions 0/260 dead transitions. [2024-06-27 21:27:10,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 260 transitions, 3241 flow [2024-06-27 21:27:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:10,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:27:10,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 21:27:10,092 INFO L175 Difference]: Start difference. First operand has 171 places, 231 transitions, 2675 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:27:10,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 260 transitions, 3241 flow [2024-06-27 21:27:10,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 260 transitions, 3194 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 21:27:10,212 INFO L231 Difference]: Finished difference. Result has 178 places, 237 transitions, 2808 flow [2024-06-27 21:27:10,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2808, PETRI_PLACES=178, PETRI_TRANSITIONS=237} [2024-06-27 21:27:10,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-27 21:27:10,213 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 237 transitions, 2808 flow [2024-06-27 21:27:10,213 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) [2024-06-27 21:27:10,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:10,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:10,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:27:10,213 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:10,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2008467787, now seen corresponding path program 5 times [2024-06-27 21:27:10,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:10,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12068332] [2024-06-27 21:27:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:10,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:11,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:11,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12068332] [2024-06-27 21:27:11,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12068332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:11,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:11,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:11,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134596122] [2024-06-27 21:27:11,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:11,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:11,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:11,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:11,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:11,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 237 transitions, 2808 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:11,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:11,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:11,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:11,955 INFO L124 PetriNetUnfolderBase]: 2061/3241 cut-off events. [2024-06-27 21:27:11,955 INFO L125 PetriNetUnfolderBase]: For 125195/125195 co-relation queries the response was YES. [2024-06-27 21:27:11,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24999 conditions, 3241 events. 2061/3241 cut-off events. For 125195/125195 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17429 event pairs, 418 based on Foata normal form. 2/3235 useless extension candidates. Maximal degree in co-relation 24912. Up to 2815 conditions per place. [2024-06-27 21:27:11,984 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 168 selfloop transitions, 102 changer transitions 0/275 dead transitions. [2024-06-27 21:27:11,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 275 transitions, 3597 flow [2024-06-27 21:27:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 21:27:11,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:27:11,986 INFO L175 Difference]: Start difference. First operand has 178 places, 237 transitions, 2808 flow. Second operand 10 states and 190 transitions. [2024-06-27 21:27:11,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 275 transitions, 3597 flow [2024-06-27 21:27:12,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 275 transitions, 3451 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:12,105 INFO L231 Difference]: Finished difference. Result has 183 places, 240 transitions, 2966 flow [2024-06-27 21:27:12,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2966, PETRI_PLACES=183, PETRI_TRANSITIONS=240} [2024-06-27 21:27:12,105 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 21:27:12,105 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 240 transitions, 2966 flow [2024-06-27 21:27:12,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:12,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:12,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:12,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:27:12,106 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:12,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:12,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1370049005, now seen corresponding path program 6 times [2024-06-27 21:27:12,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:12,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474056046] [2024-06-27 21:27:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:12,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:13,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:13,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474056046] [2024-06-27 21:27:13,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474056046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:13,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:13,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:13,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145514899] [2024-06-27 21:27:13,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:13,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:13,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:13,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:13,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:13,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:13,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 240 transitions, 2966 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:13,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:13,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:13,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:13,839 INFO L124 PetriNetUnfolderBase]: 2072/3270 cut-off events. [2024-06-27 21:27:13,839 INFO L125 PetriNetUnfolderBase]: For 132900/132900 co-relation queries the response was YES. [2024-06-27 21:27:13,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25747 conditions, 3270 events. 2072/3270 cut-off events. For 132900/132900 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17670 event pairs, 474 based on Foata normal form. 2/3264 useless extension candidates. Maximal degree in co-relation 25659. Up to 2831 conditions per place. [2024-06-27 21:27:13,870 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 179 selfloop transitions, 94 changer transitions 0/278 dead transitions. [2024-06-27 21:27:13,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 278 transitions, 3747 flow [2024-06-27 21:27:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 21:27:13,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 21:27:13,872 INFO L175 Difference]: Start difference. First operand has 183 places, 240 transitions, 2966 flow. Second operand 10 states and 191 transitions. [2024-06-27 21:27:13,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 278 transitions, 3747 flow [2024-06-27 21:27:13,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 278 transitions, 3487 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:13,989 INFO L231 Difference]: Finished difference. Result has 185 places, 243 transitions, 2980 flow [2024-06-27 21:27:13,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2980, PETRI_PLACES=185, PETRI_TRANSITIONS=243} [2024-06-27 21:27:13,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-27 21:27:13,990 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 243 transitions, 2980 flow [2024-06-27 21:27:13,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:13,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:13,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:13,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:27:13,990 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:13,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:13,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1723367917, now seen corresponding path program 7 times [2024-06-27 21:27:13,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:13,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838672882] [2024-06-27 21:27:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:13,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:14,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:14,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838672882] [2024-06-27 21:27:14,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838672882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:14,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:14,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:14,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155192021] [2024-06-27 21:27:14,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:14,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:14,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:14,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:14,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 243 transitions, 2980 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:14,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:14,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:14,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:15,618 INFO L124 PetriNetUnfolderBase]: 2067/3256 cut-off events. [2024-06-27 21:27:15,618 INFO L125 PetriNetUnfolderBase]: For 140302/140302 co-relation queries the response was YES. [2024-06-27 21:27:15,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25960 conditions, 3256 events. 2067/3256 cut-off events. For 140302/140302 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17569 event pairs, 429 based on Foata normal form. 2/3242 useless extension candidates. Maximal degree in co-relation 25871. Up to 2702 conditions per place. [2024-06-27 21:27:15,644 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 141 selfloop transitions, 128 changer transitions 0/274 dead transitions. [2024-06-27 21:27:15,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 274 transitions, 3715 flow [2024-06-27 21:27:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:27:15,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:27:15,645 INFO L175 Difference]: Start difference. First operand has 185 places, 243 transitions, 2980 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:27:15,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 274 transitions, 3715 flow [2024-06-27 21:27:15,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 274 transitions, 3465 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:15,769 INFO L231 Difference]: Finished difference. Result has 186 places, 246 transitions, 3078 flow [2024-06-27 21:27:15,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2730, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3078, PETRI_PLACES=186, PETRI_TRANSITIONS=246} [2024-06-27 21:27:15,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 21:27:15,769 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 246 transitions, 3078 flow [2024-06-27 21:27:15,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:15,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:15,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:15,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:27:15,770 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:15,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1210452663, now seen corresponding path program 2 times [2024-06-27 21:27:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:15,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597516386] [2024-06-27 21:27:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:16,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:16,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597516386] [2024-06-27 21:27:16,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597516386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:16,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:16,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:16,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169554323] [2024-06-27 21:27:16,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:16,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:16,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:16,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:16,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 246 transitions, 3078 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-27 21:27:16,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:16,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:16,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:17,003 INFO L124 PetriNetUnfolderBase]: 2087/3290 cut-off events. [2024-06-27 21:27:17,003 INFO L125 PetriNetUnfolderBase]: For 150117/150117 co-relation queries the response was YES. [2024-06-27 21:27:17,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26672 conditions, 3290 events. 2087/3290 cut-off events. For 150117/150117 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17795 event pairs, 428 based on Foata normal form. 4/3291 useless extension candidates. Maximal degree in co-relation 26582. Up to 3040 conditions per place. [2024-06-27 21:27:17,031 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 217 selfloop transitions, 41 changer transitions 0/263 dead transitions. [2024-06-27 21:27:17,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 263 transitions, 3708 flow [2024-06-27 21:27:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:27:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:27:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-27 21:27:17,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-27 21:27:17,032 INFO L175 Difference]: Start difference. First operand has 186 places, 246 transitions, 3078 flow. Second operand 5 states and 104 transitions. [2024-06-27 21:27:17,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 263 transitions, 3708 flow [2024-06-27 21:27:17,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 263 transitions, 3373 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:17,179 INFO L231 Difference]: Finished difference. Result has 184 places, 249 transitions, 2913 flow [2024-06-27 21:27:17,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2913, PETRI_PLACES=184, PETRI_TRANSITIONS=249} [2024-06-27 21:27:17,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-27 21:27:17,179 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 249 transitions, 2913 flow [2024-06-27 21:27:17,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-27 21:27:17,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:17,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:17,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:27:17,180 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:17,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1316667191, now seen corresponding path program 3 times [2024-06-27 21:27:17,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:17,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700572652] [2024-06-27 21:27:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:17,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:17,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:17,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700572652] [2024-06-27 21:27:17,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700572652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:17,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:17,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:17,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165710632] [2024-06-27 21:27:17,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:17,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:17,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:17,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:17,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:17,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:17,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 249 transitions, 2913 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-27 21:27:17,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:17,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:17,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:18,428 INFO L124 PetriNetUnfolderBase]: 2075/3272 cut-off events. [2024-06-27 21:27:18,429 INFO L125 PetriNetUnfolderBase]: For 152372/152372 co-relation queries the response was YES. [2024-06-27 21:27:18,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26168 conditions, 3272 events. 2075/3272 cut-off events. For 152372/152372 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17680 event pairs, 422 based on Foata normal form. 4/3273 useless extension candidates. Maximal degree in co-relation 26077. Up to 2992 conditions per place. [2024-06-27 21:27:18,456 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 214 selfloop transitions, 47 changer transitions 0/266 dead transitions. [2024-06-27 21:27:18,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 266 transitions, 3533 flow [2024-06-27 21:27:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 21:27:18,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 21:27:18,457 INFO L175 Difference]: Start difference. First operand has 184 places, 249 transitions, 2913 flow. Second operand 6 states and 120 transitions. [2024-06-27 21:27:18,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 266 transitions, 3533 flow [2024-06-27 21:27:18,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 266 transitions, 3441 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:18,596 INFO L231 Difference]: Finished difference. Result has 187 places, 249 transitions, 2927 flow [2024-06-27 21:27:18,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2927, PETRI_PLACES=187, PETRI_TRANSITIONS=249} [2024-06-27 21:27:18,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-27 21:27:18,598 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 249 transitions, 2927 flow [2024-06-27 21:27:18,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-27 21:27:18,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:18,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:18,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:27:18,598 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:18,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:18,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1032970781, now seen corresponding path program 1 times [2024-06-27 21:27:18,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:18,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805778777] [2024-06-27 21:27:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:18,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:19,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:19,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805778777] [2024-06-27 21:27:19,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805778777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:19,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:19,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:19,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337779981] [2024-06-27 21:27:19,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:19,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:19,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:19,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:19,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:19,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:27:19,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 249 transitions, 2927 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:19,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:19,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:27:19,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:19,769 INFO L124 PetriNetUnfolderBase]: 1998/3207 cut-off events. [2024-06-27 21:27:19,769 INFO L125 PetriNetUnfolderBase]: For 156088/156088 co-relation queries the response was YES. [2024-06-27 21:27:19,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25920 conditions, 3207 events. 1998/3207 cut-off events. For 156088/156088 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17720 event pairs, 416 based on Foata normal form. 3/3204 useless extension candidates. Maximal degree in co-relation 25828. Up to 2915 conditions per place. [2024-06-27 21:27:19,796 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 226 selfloop transitions, 26 changer transitions 0/274 dead transitions. [2024-06-27 21:27:19,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 274 transitions, 3639 flow [2024-06-27 21:27:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 21:27:19,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-27 21:27:19,797 INFO L175 Difference]: Start difference. First operand has 187 places, 249 transitions, 2927 flow. Second operand 7 states and 138 transitions. [2024-06-27 21:27:19,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 274 transitions, 3639 flow [2024-06-27 21:27:19,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 274 transitions, 3532 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:19,925 INFO L231 Difference]: Finished difference. Result has 189 places, 255 transitions, 2954 flow [2024-06-27 21:27:19,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2954, PETRI_PLACES=189, PETRI_TRANSITIONS=255} [2024-06-27 21:27:19,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-27 21:27:19,925 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 255 transitions, 2954 flow [2024-06-27 21:27:19,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:19,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:19,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:19,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:27:19,926 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:19,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:19,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1033090751, now seen corresponding path program 2 times [2024-06-27 21:27:19,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:19,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704223741] [2024-06-27 21:27:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:19,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:20,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:20,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704223741] [2024-06-27 21:27:20,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704223741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:20,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:20,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:20,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54161237] [2024-06-27 21:27:20,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:20,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:20,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:20,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:20,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:27:20,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 255 transitions, 2954 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:20,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:20,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:27:20,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:21,229 INFO L124 PetriNetUnfolderBase]: 2028/3245 cut-off events. [2024-06-27 21:27:21,229 INFO L125 PetriNetUnfolderBase]: For 158715/158715 co-relation queries the response was YES. [2024-06-27 21:27:21,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26304 conditions, 3245 events. 2028/3245 cut-off events. For 158715/158715 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17880 event pairs, 419 based on Foata normal form. 3/3242 useless extension candidates. Maximal degree in co-relation 26212. Up to 2967 conditions per place. [2024-06-27 21:27:21,262 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 230 selfloop transitions, 26 changer transitions 0/278 dead transitions. [2024-06-27 21:27:21,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 278 transitions, 3602 flow [2024-06-27 21:27:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:27:21,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:27:21,264 INFO L175 Difference]: Start difference. First operand has 189 places, 255 transitions, 2954 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:27:21,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 278 transitions, 3602 flow [2024-06-27 21:27:21,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 278 transitions, 3540 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:21,395 INFO L231 Difference]: Finished difference. Result has 193 places, 263 transitions, 3043 flow [2024-06-27 21:27:21,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2901, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3043, PETRI_PLACES=193, PETRI_TRANSITIONS=263} [2024-06-27 21:27:21,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-27 21:27:21,396 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 263 transitions, 3043 flow [2024-06-27 21:27:21,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:21,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:21,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:21,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:27:21,397 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:21,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:21,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1316882269, now seen corresponding path program 3 times [2024-06-27 21:27:21,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:21,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628743739] [2024-06-27 21:27:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:21,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:21,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:21,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628743739] [2024-06-27 21:27:21,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628743739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:21,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:21,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:21,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195705841] [2024-06-27 21:27:21,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:21,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:21,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:22,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:27:22,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 263 transitions, 3043 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:22,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:22,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:27:22,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:22,627 INFO L124 PetriNetUnfolderBase]: 2013/3227 cut-off events. [2024-06-27 21:27:22,627 INFO L125 PetriNetUnfolderBase]: For 160330/160330 co-relation queries the response was YES. [2024-06-27 21:27:22,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26253 conditions, 3227 events. 2013/3227 cut-off events. For 160330/160330 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17802 event pairs, 418 based on Foata normal form. 3/3224 useless extension candidates. Maximal degree in co-relation 26159. Up to 2948 conditions per place. [2024-06-27 21:27:22,659 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 24 changer transitions 0/279 dead transitions. [2024-06-27 21:27:22,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 279 transitions, 3613 flow [2024-06-27 21:27:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 21:27:22,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-27 21:27:22,660 INFO L175 Difference]: Start difference. First operand has 193 places, 263 transitions, 3043 flow. Second operand 6 states and 121 transitions. [2024-06-27 21:27:22,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 279 transitions, 3613 flow [2024-06-27 21:27:22,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 279 transitions, 3522 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:22,813 INFO L231 Difference]: Finished difference. Result has 195 places, 263 transitions, 3011 flow [2024-06-27 21:27:22,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3011, PETRI_PLACES=195, PETRI_TRANSITIONS=263} [2024-06-27 21:27:22,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-27 21:27:22,813 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 263 transitions, 3011 flow [2024-06-27 21:27:22,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:22,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:22,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:22,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:27:22,815 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:22,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1317128533, now seen corresponding path program 1 times [2024-06-27 21:27:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:22,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538830967] [2024-06-27 21:27:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:22,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:23,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:23,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538830967] [2024-06-27 21:27:23,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538830967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:23,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:23,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:23,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651665168] [2024-06-27 21:27:23,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:23,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:23,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:23,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:23,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:23,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 263 transitions, 3011 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:23,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:23,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:23,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:24,149 INFO L124 PetriNetUnfolderBase]: 2114/3331 cut-off events. [2024-06-27 21:27:24,149 INFO L125 PetriNetUnfolderBase]: For 163654/163654 co-relation queries the response was YES. [2024-06-27 21:27:24,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26878 conditions, 3331 events. 2114/3331 cut-off events. For 163654/163654 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17998 event pairs, 454 based on Foata normal form. 2/3330 useless extension candidates. Maximal degree in co-relation 26783. Up to 3179 conditions per place. [2024-06-27 21:27:24,182 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 254 selfloop transitions, 14 changer transitions 0/273 dead transitions. [2024-06-27 21:27:24,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 273 transitions, 3595 flow [2024-06-27 21:27:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:27:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:27:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 21:27:24,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 21:27:24,183 INFO L175 Difference]: Start difference. First operand has 195 places, 263 transitions, 3011 flow. Second operand 5 states and 94 transitions. [2024-06-27 21:27:24,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 273 transitions, 3595 flow [2024-06-27 21:27:24,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 273 transitions, 3536 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:24,334 INFO L231 Difference]: Finished difference. Result has 195 places, 265 transitions, 3013 flow [2024-06-27 21:27:24,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3013, PETRI_PLACES=195, PETRI_TRANSITIONS=265} [2024-06-27 21:27:24,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-27 21:27:24,335 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 265 transitions, 3013 flow [2024-06-27 21:27:24,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:24,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:24,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:24,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:27:24,335 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:24,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:24,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1170688786, now seen corresponding path program 1 times [2024-06-27 21:27:24,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:24,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682522723] [2024-06-27 21:27:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:24,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:25,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:25,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682522723] [2024-06-27 21:27:25,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682522723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:25,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:25,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:25,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585268791] [2024-06-27 21:27:25,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:25,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:25,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:25,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:25,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:25,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 265 transitions, 3013 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:25,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:25,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:25,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:25,904 INFO L124 PetriNetUnfolderBase]: 2131/3360 cut-off events. [2024-06-27 21:27:25,904 INFO L125 PetriNetUnfolderBase]: For 171259/171259 co-relation queries the response was YES. [2024-06-27 21:27:25,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27253 conditions, 3360 events. 2131/3360 cut-off events. For 171259/171259 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18187 event pairs, 429 based on Foata normal form. 4/3361 useless extension candidates. Maximal degree in co-relation 27157. Up to 3128 conditions per place. [2024-06-27 21:27:25,942 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 32 changer transitions 0/296 dead transitions. [2024-06-27 21:27:25,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 296 transitions, 3732 flow [2024-06-27 21:27:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:27:25,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:27:25,944 INFO L175 Difference]: Start difference. First operand has 195 places, 265 transitions, 3013 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:27:25,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 296 transitions, 3732 flow [2024-06-27 21:27:26,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 296 transitions, 3687 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:26,113 INFO L231 Difference]: Finished difference. Result has 201 places, 267 transitions, 3082 flow [2024-06-27 21:27:26,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3082, PETRI_PLACES=201, PETRI_TRANSITIONS=267} [2024-06-27 21:27:26,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-27 21:27:26,114 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 267 transitions, 3082 flow [2024-06-27 21:27:26,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:26,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:26,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:26,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:27:26,114 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:26,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:26,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1369990576, now seen corresponding path program 2 times [2024-06-27 21:27:26,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:26,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147180912] [2024-06-27 21:27:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:26,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:26,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:26,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147180912] [2024-06-27 21:27:26,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147180912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:26,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:26,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:26,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978907582] [2024-06-27 21:27:26,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:26,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:26,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:26,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:26,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:26,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:26,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 267 transitions, 3082 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:26,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:26,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:26,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:27,762 INFO L124 PetriNetUnfolderBase]: 2123/3348 cut-off events. [2024-06-27 21:27:27,763 INFO L125 PetriNetUnfolderBase]: For 175192/175192 co-relation queries the response was YES. [2024-06-27 21:27:27,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27395 conditions, 3348 events. 2123/3348 cut-off events. For 175192/175192 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18098 event pairs, 438 based on Foata normal form. 4/3349 useless extension candidates. Maximal degree in co-relation 27298. Up to 3116 conditions per place. [2024-06-27 21:27:27,796 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 32 changer transitions 0/298 dead transitions. [2024-06-27 21:27:27,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 298 transitions, 3809 flow [2024-06-27 21:27:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:27:27,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:27:27,801 INFO L175 Difference]: Start difference. First operand has 201 places, 267 transitions, 3082 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:27:27,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 298 transitions, 3809 flow [2024-06-27 21:27:27,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 298 transitions, 3728 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:28,002 INFO L231 Difference]: Finished difference. Result has 204 places, 269 transitions, 3119 flow [2024-06-27 21:27:28,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3001, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3119, PETRI_PLACES=204, PETRI_TRANSITIONS=269} [2024-06-27 21:27:28,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 21:27:28,005 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 269 transitions, 3119 flow [2024-06-27 21:27:28,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:28,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:28,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:28,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:27:28,005 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:28,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1191543746, now seen corresponding path program 3 times [2024-06-27 21:27:28,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:28,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883314520] [2024-06-27 21:27:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:28,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:28,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883314520] [2024-06-27 21:27:28,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883314520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:28,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:28,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:28,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32869331] [2024-06-27 21:27:28,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:28,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:28,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:28,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:28,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 269 transitions, 3119 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:28,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:28,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:28,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:29,548 INFO L124 PetriNetUnfolderBase]: 2140/3381 cut-off events. [2024-06-27 21:27:29,548 INFO L125 PetriNetUnfolderBase]: For 183276/183276 co-relation queries the response was YES. [2024-06-27 21:27:29,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27823 conditions, 3381 events. 2140/3381 cut-off events. For 183276/183276 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18319 event pairs, 459 based on Foata normal form. 4/3382 useless extension candidates. Maximal degree in co-relation 27725. Up to 3084 conditions per place. [2024-06-27 21:27:29,583 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 37 changer transitions 0/303 dead transitions. [2024-06-27 21:27:29,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 303 transitions, 3899 flow [2024-06-27 21:27:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:27:29,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 21:27:29,584 INFO L175 Difference]: Start difference. First operand has 204 places, 269 transitions, 3119 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:27:29,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 303 transitions, 3899 flow [2024-06-27 21:27:29,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 303 transitions, 3802 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:29,810 INFO L231 Difference]: Finished difference. Result has 207 places, 273 transitions, 3202 flow [2024-06-27 21:27:29,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3202, PETRI_PLACES=207, PETRI_TRANSITIONS=273} [2024-06-27 21:27:29,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-27 21:27:29,810 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 273 transitions, 3202 flow [2024-06-27 21:27:29,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:29,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:29,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:29,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:27:29,811 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:29,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:29,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1072638914, now seen corresponding path program 4 times [2024-06-27 21:27:29,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:29,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368245272] [2024-06-27 21:27:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:29,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:30,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:30,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368245272] [2024-06-27 21:27:30,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368245272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:30,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:30,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:30,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955124213] [2024-06-27 21:27:30,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:30,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:30,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:30,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:30,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 273 transitions, 3202 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:30,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:30,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:30,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:31,432 INFO L124 PetriNetUnfolderBase]: 2182/3441 cut-off events. [2024-06-27 21:27:31,432 INFO L125 PetriNetUnfolderBase]: For 196652/196652 co-relation queries the response was YES. [2024-06-27 21:27:31,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28817 conditions, 3441 events. 2182/3441 cut-off events. For 196652/196652 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18732 event pairs, 415 based on Foata normal form. 4/3442 useless extension candidates. Maximal degree in co-relation 28717. Up to 3053 conditions per place. [2024-06-27 21:27:31,467 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 68 changer transitions 0/312 dead transitions. [2024-06-27 21:27:31,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 312 transitions, 4202 flow [2024-06-27 21:27:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:27:31,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-27 21:27:31,468 INFO L175 Difference]: Start difference. First operand has 207 places, 273 transitions, 3202 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:27:31,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 312 transitions, 4202 flow [2024-06-27 21:27:31,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 312 transitions, 4093 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:31,671 INFO L231 Difference]: Finished difference. Result has 212 places, 278 transitions, 3369 flow [2024-06-27 21:27:31,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3093, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3369, PETRI_PLACES=212, PETRI_TRANSITIONS=278} [2024-06-27 21:27:31,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-27 21:27:31,672 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 278 transitions, 3369 flow [2024-06-27 21:27:31,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:31,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:31,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:31,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:27:31,675 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:31,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:31,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1072786784, now seen corresponding path program 5 times [2024-06-27 21:27:31,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:31,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714545948] [2024-06-27 21:27:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:31,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:32,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:32,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714545948] [2024-06-27 21:27:32,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714545948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:32,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:32,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:32,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407064372] [2024-06-27 21:27:32,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:32,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:32,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:32,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:32,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:32,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 278 transitions, 3369 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:32,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:32,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:32,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:33,300 INFO L124 PetriNetUnfolderBase]: 2174/3429 cut-off events. [2024-06-27 21:27:33,301 INFO L125 PetriNetUnfolderBase]: For 201372/201372 co-relation queries the response was YES. [2024-06-27 21:27:33,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28943 conditions, 3429 events. 2174/3429 cut-off events. For 201372/201372 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18594 event pairs, 420 based on Foata normal form. 4/3430 useless extension candidates. Maximal degree in co-relation 28840. Up to 3107 conditions per place. [2024-06-27 21:27:33,336 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 71 changer transitions 0/310 dead transitions. [2024-06-27 21:27:33,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 310 transitions, 4118 flow [2024-06-27 21:27:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:27:33,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 21:27:33,338 INFO L175 Difference]: Start difference. First operand has 212 places, 278 transitions, 3369 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:27:33,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 310 transitions, 4118 flow [2024-06-27 21:27:33,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 310 transitions, 3912 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:33,566 INFO L231 Difference]: Finished difference. Result has 216 places, 279 transitions, 3354 flow [2024-06-27 21:27:33,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3193, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3354, PETRI_PLACES=216, PETRI_TRANSITIONS=279} [2024-06-27 21:27:33,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-27 21:27:33,567 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 279 transitions, 3354 flow [2024-06-27 21:27:33,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:33,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:33,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:27:33,568 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:33,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash 984073154, now seen corresponding path program 6 times [2024-06-27 21:27:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:33,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064525553] [2024-06-27 21:27:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:34,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:34,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064525553] [2024-06-27 21:27:34,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064525553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:34,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:34,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:34,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21839806] [2024-06-27 21:27:34,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:34,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:34,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:34,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:34,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 279 transitions, 3354 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:34,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:34,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:34,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:35,145 INFO L124 PetriNetUnfolderBase]: 2191/3458 cut-off events. [2024-06-27 21:27:35,145 INFO L125 PetriNetUnfolderBase]: For 207819/207819 co-relation queries the response was YES. [2024-06-27 21:27:35,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29187 conditions, 3458 events. 2191/3458 cut-off events. For 207819/207819 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18705 event pairs, 406 based on Foata normal form. 4/3459 useless extension candidates. Maximal degree in co-relation 29082. Up to 3158 conditions per place. [2024-06-27 21:27:35,182 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 41 changer transitions 0/318 dead transitions. [2024-06-27 21:27:35,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 318 transitions, 4224 flow [2024-06-27 21:27:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:27:35,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 21:27:35,183 INFO L175 Difference]: Start difference. First operand has 216 places, 279 transitions, 3354 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:27:35,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 318 transitions, 4224 flow [2024-06-27 21:27:35,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 318 transitions, 4090 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:35,387 INFO L231 Difference]: Finished difference. Result has 220 places, 285 transitions, 3465 flow [2024-06-27 21:27:35,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3220, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3465, PETRI_PLACES=220, PETRI_TRANSITIONS=285} [2024-06-27 21:27:35,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-27 21:27:35,388 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 285 transitions, 3465 flow [2024-06-27 21:27:35,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:35,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:35,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:35,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:27:35,389 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:35,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:35,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1390999358, now seen corresponding path program 1 times [2024-06-27 21:27:35,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:35,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330801666] [2024-06-27 21:27:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:35,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:36,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:36,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330801666] [2024-06-27 21:27:36,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330801666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:36,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:36,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:36,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718709087] [2024-06-27 21:27:36,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:36,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:36,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:36,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:36,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:36,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:36,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 285 transitions, 3465 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:36,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:36,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:36,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:37,311 INFO L124 PetriNetUnfolderBase]: 2249/3550 cut-off events. [2024-06-27 21:27:37,311 INFO L125 PetriNetUnfolderBase]: For 230168/230168 co-relation queries the response was YES. [2024-06-27 21:27:37,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30154 conditions, 3550 events. 2249/3550 cut-off events. For 230168/230168 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19440 event pairs, 422 based on Foata normal form. 16/3563 useless extension candidates. Maximal degree in co-relation 30046. Up to 3115 conditions per place. [2024-06-27 21:27:37,351 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 234 selfloop transitions, 83 changer transitions 0/322 dead transitions. [2024-06-27 21:27:37,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 322 transitions, 4294 flow [2024-06-27 21:27:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 21:27:37,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 21:27:37,353 INFO L175 Difference]: Start difference. First operand has 220 places, 285 transitions, 3465 flow. Second operand 10 states and 188 transitions. [2024-06-27 21:27:37,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 322 transitions, 4294 flow [2024-06-27 21:27:37,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 322 transitions, 4134 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:37,632 INFO L231 Difference]: Finished difference. Result has 226 places, 286 transitions, 3507 flow [2024-06-27 21:27:37,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3305, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3507, PETRI_PLACES=226, PETRI_TRANSITIONS=286} [2024-06-27 21:27:37,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-27 21:27:37,633 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 286 transitions, 3507 flow [2024-06-27 21:27:37,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:37,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:37,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:37,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:27:37,633 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:37,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1398617918, now seen corresponding path program 2 times [2024-06-27 21:27:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:37,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268337905] [2024-06-27 21:27:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:37,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:38,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:38,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268337905] [2024-06-27 21:27:38,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268337905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:38,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:38,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:38,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636003751] [2024-06-27 21:27:38,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:38,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:38,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:38,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:38,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:38,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:38,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 286 transitions, 3507 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:38,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:38,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:38,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:39,598 INFO L124 PetriNetUnfolderBase]: 2437/3880 cut-off events. [2024-06-27 21:27:39,598 INFO L125 PetriNetUnfolderBase]: For 265522/265522 co-relation queries the response was YES. [2024-06-27 21:27:39,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33822 conditions, 3880 events. 2437/3880 cut-off events. For 265522/265522 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21855 event pairs, 529 based on Foata normal form. 12/3889 useless extension candidates. Maximal degree in co-relation 33712. Up to 3009 conditions per place. [2024-06-27 21:27:39,636 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 224 selfloop transitions, 101 changer transitions 0/330 dead transitions. [2024-06-27 21:27:39,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 330 transitions, 4648 flow [2024-06-27 21:27:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:39,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 21:27:39,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-27 21:27:39,637 INFO L175 Difference]: Start difference. First operand has 226 places, 286 transitions, 3507 flow. Second operand 10 states and 193 transitions. [2024-06-27 21:27:39,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 330 transitions, 4648 flow [2024-06-27 21:27:39,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 330 transitions, 4473 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:39,904 INFO L231 Difference]: Finished difference. Result has 229 places, 289 transitions, 3661 flow [2024-06-27 21:27:39,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3661, PETRI_PLACES=229, PETRI_TRANSITIONS=289} [2024-06-27 21:27:39,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-27 21:27:39,904 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 289 transitions, 3661 flow [2024-06-27 21:27:39,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:39,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:39,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:39,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:27:39,905 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:39,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:39,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1398351008, now seen corresponding path program 3 times [2024-06-27 21:27:39,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:39,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146066881] [2024-06-27 21:27:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:39,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146066881] [2024-06-27 21:27:40,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146066881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:40,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:40,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:40,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810820024] [2024-06-27 21:27:40,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:40,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:40,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:40,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:40,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:40,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 289 transitions, 3661 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:40,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:40,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:40,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:41,955 INFO L124 PetriNetUnfolderBase]: 2495/3978 cut-off events. [2024-06-27 21:27:41,955 INFO L125 PetriNetUnfolderBase]: For 284910/284910 co-relation queries the response was YES. [2024-06-27 21:27:41,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34979 conditions, 3978 events. 2495/3978 cut-off events. For 284910/284910 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22638 event pairs, 520 based on Foata normal form. 16/3991 useless extension candidates. Maximal degree in co-relation 34867. Up to 3608 conditions per place. [2024-06-27 21:27:42,001 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 280 selfloop transitions, 45 changer transitions 0/330 dead transitions. [2024-06-27 21:27:42,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 330 transitions, 4532 flow [2024-06-27 21:27:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:27:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:27:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-27 21:27:42,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-27 21:27:42,002 INFO L175 Difference]: Start difference. First operand has 229 places, 289 transitions, 3661 flow. Second operand 11 states and 206 transitions. [2024-06-27 21:27:42,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 330 transitions, 4532 flow [2024-06-27 21:27:42,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 330 transitions, 4372 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:42,336 INFO L231 Difference]: Finished difference. Result has 234 places, 290 transitions, 3642 flow [2024-06-27 21:27:42,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3509, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3642, PETRI_PLACES=234, PETRI_TRANSITIONS=290} [2024-06-27 21:27:42,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-27 21:27:42,337 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 290 transitions, 3642 flow [2024-06-27 21:27:42,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:42,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:42,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:42,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:27:42,337 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:42,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:42,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1191697568, now seen corresponding path program 4 times [2024-06-27 21:27:42,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:42,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398520944] [2024-06-27 21:27:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:42,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:43,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398520944] [2024-06-27 21:27:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398520944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:43,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:43,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867694544] [2024-06-27 21:27:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:43,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:43,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:43,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:43,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:43,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 290 transitions, 3642 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:43,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:43,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:43,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:44,412 INFO L124 PetriNetUnfolderBase]: 2467/3940 cut-off events. [2024-06-27 21:27:44,412 INFO L125 PetriNetUnfolderBase]: For 273127/273127 co-relation queries the response was YES. [2024-06-27 21:27:44,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33940 conditions, 3940 events. 2467/3940 cut-off events. For 273127/273127 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22445 event pairs, 553 based on Foata normal form. 16/3953 useless extension candidates. Maximal degree in co-relation 33826. Up to 3609 conditions per place. [2024-06-27 21:27:44,459 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 287 selfloop transitions, 34 changer transitions 0/326 dead transitions. [2024-06-27 21:27:44,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 326 transitions, 4452 flow [2024-06-27 21:27:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 21:27:44,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-27 21:27:44,460 INFO L175 Difference]: Start difference. First operand has 234 places, 290 transitions, 3642 flow. Second operand 10 states and 187 transitions. [2024-06-27 21:27:44,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 326 transitions, 4452 flow [2024-06-27 21:27:44,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 326 transitions, 4362 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 21:27:44,769 INFO L231 Difference]: Finished difference. Result has 235 places, 290 transitions, 3627 flow [2024-06-27 21:27:44,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3627, PETRI_PLACES=235, PETRI_TRANSITIONS=290} [2024-06-27 21:27:44,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 21:27:44,770 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 290 transitions, 3627 flow [2024-06-27 21:27:44,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:44,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:44,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:44,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:27:44,771 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:44,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:44,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1072792736, now seen corresponding path program 5 times [2024-06-27 21:27:44,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:44,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927817942] [2024-06-27 21:27:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:44,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:45,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:45,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927817942] [2024-06-27 21:27:45,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927817942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:45,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:45,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:45,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138088368] [2024-06-27 21:27:45,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:45,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:45,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:45,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:45,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:45,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:45,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 290 transitions, 3627 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:45,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:45,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:45,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:46,780 INFO L124 PetriNetUnfolderBase]: 2439/3889 cut-off events. [2024-06-27 21:27:46,780 INFO L125 PetriNetUnfolderBase]: For 265913/265913 co-relation queries the response was YES. [2024-06-27 21:27:46,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32960 conditions, 3889 events. 2439/3889 cut-off events. For 265913/265913 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22003 event pairs, 476 based on Foata normal form. 16/3902 useless extension candidates. Maximal degree in co-relation 32845. Up to 3461 conditions per place. [2024-06-27 21:27:46,900 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 247 selfloop transitions, 76 changer transitions 0/328 dead transitions. [2024-06-27 21:27:46,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 328 transitions, 4447 flow [2024-06-27 21:27:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 21:27:46,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 21:27:46,901 INFO L175 Difference]: Start difference. First operand has 235 places, 290 transitions, 3627 flow. Second operand 10 states and 188 transitions. [2024-06-27 21:27:46,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 328 transitions, 4447 flow [2024-06-27 21:27:47,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 328 transitions, 4364 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:47,231 INFO L231 Difference]: Finished difference. Result has 237 places, 290 transitions, 3705 flow [2024-06-27 21:27:47,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3705, PETRI_PLACES=237, PETRI_TRANSITIONS=290} [2024-06-27 21:27:47,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-27 21:27:47,231 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 290 transitions, 3705 flow [2024-06-27 21:27:47,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:47,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:47,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:47,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:27:47,232 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:47,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:47,232 INFO L85 PathProgramCache]: Analyzing trace with hash 271347302, now seen corresponding path program 7 times [2024-06-27 21:27:47,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:47,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283600924] [2024-06-27 21:27:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:47,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:47,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:47,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283600924] [2024-06-27 21:27:47,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283600924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:47,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:47,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:47,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34438033] [2024-06-27 21:27:47,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:47,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:47,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:47,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:48,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:48,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 290 transitions, 3705 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:48,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:48,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:48,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:48,918 INFO L124 PetriNetUnfolderBase]: 2431/3873 cut-off events. [2024-06-27 21:27:48,919 INFO L125 PetriNetUnfolderBase]: For 254024/254024 co-relation queries the response was YES. [2024-06-27 21:27:48,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32838 conditions, 3873 events. 2431/3873 cut-off events. For 254024/254024 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21929 event pairs, 493 based on Foata normal form. 4/3867 useless extension candidates. Maximal degree in co-relation 32722. Up to 3500 conditions per place. [2024-06-27 21:27:48,957 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 275 selfloop transitions, 52 changer transitions 0/332 dead transitions. [2024-06-27 21:27:48,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 332 transitions, 4690 flow [2024-06-27 21:27:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:27:48,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 21:27:48,958 INFO L175 Difference]: Start difference. First operand has 237 places, 290 transitions, 3705 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:27:48,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 332 transitions, 4690 flow [2024-06-27 21:27:49,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 332 transitions, 4537 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:49,238 INFO L231 Difference]: Finished difference. Result has 240 places, 304 transitions, 3931 flow [2024-06-27 21:27:49,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3931, PETRI_PLACES=240, PETRI_TRANSITIONS=304} [2024-06-27 21:27:49,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 21:27:49,238 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 304 transitions, 3931 flow [2024-06-27 21:27:49,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:49,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:49,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:49,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:27:49,239 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:49,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:49,239 INFO L85 PathProgramCache]: Analyzing trace with hash -709039562, now seen corresponding path program 6 times [2024-06-27 21:27:49,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:49,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120649394] [2024-06-27 21:27:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:49,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:50,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:50,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120649394] [2024-06-27 21:27:50,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120649394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:50,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:50,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:50,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334594721] [2024-06-27 21:27:50,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:50,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:50,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:50,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:50,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:50,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 304 transitions, 3931 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:50,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:50,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:50,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:51,300 INFO L124 PetriNetUnfolderBase]: 2558/4098 cut-off events. [2024-06-27 21:27:51,301 INFO L125 PetriNetUnfolderBase]: For 299841/299841 co-relation queries the response was YES. [2024-06-27 21:27:51,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35718 conditions, 4098 events. 2558/4098 cut-off events. For 299841/299841 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23697 event pairs, 501 based on Foata normal form. 12/4102 useless extension candidates. Maximal degree in co-relation 35599. Up to 3302 conditions per place. [2024-06-27 21:27:51,346 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 140 changer transitions 0/351 dead transitions. [2024-06-27 21:27:51,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 351 transitions, 5127 flow [2024-06-27 21:27:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:27:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:27:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 21:27:51,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745011086474501 [2024-06-27 21:27:51,347 INFO L175 Difference]: Start difference. First operand has 240 places, 304 transitions, 3931 flow. Second operand 11 states and 214 transitions. [2024-06-27 21:27:51,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 351 transitions, 5127 flow [2024-06-27 21:27:51,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 351 transitions, 4936 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:51,758 INFO L231 Difference]: Finished difference. Result has 248 places, 306 transitions, 4108 flow [2024-06-27 21:27:51,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4108, PETRI_PLACES=248, PETRI_TRANSITIONS=306} [2024-06-27 21:27:51,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-27 21:27:51,758 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 306 transitions, 4108 flow [2024-06-27 21:27:51,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:51,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:51,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:51,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:27:51,759 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:51,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1884797116, now seen corresponding path program 7 times [2024-06-27 21:27:51,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:51,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711470032] [2024-06-27 21:27:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:51,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:52,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:52,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711470032] [2024-06-27 21:27:52,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711470032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:52,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:52,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:52,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068718340] [2024-06-27 21:27:52,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:52,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:52,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:52,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:52,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 306 transitions, 4108 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:52,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:52,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:52,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:53,745 INFO L124 PetriNetUnfolderBase]: 2530/4037 cut-off events. [2024-06-27 21:27:53,745 INFO L125 PetriNetUnfolderBase]: For 293715/293715 co-relation queries the response was YES. [2024-06-27 21:27:53,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34653 conditions, 4037 events. 2530/4037 cut-off events. For 293715/293715 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23194 event pairs, 506 based on Foata normal form. 16/4037 useless extension candidates. Maximal degree in co-relation 34532. Up to 3381 conditions per place. [2024-06-27 21:27:53,793 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 134 changer transitions 0/340 dead transitions. [2024-06-27 21:27:53,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 340 transitions, 4940 flow [2024-06-27 21:27:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 21:27:53,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:27:53,795 INFO L175 Difference]: Start difference. First operand has 248 places, 306 transitions, 4108 flow. Second operand 10 states and 190 transitions. [2024-06-27 21:27:53,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 340 transitions, 4940 flow [2024-06-27 21:27:54,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 340 transitions, 4713 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:54,220 INFO L231 Difference]: Finished difference. Result has 250 places, 306 transitions, 4156 flow [2024-06-27 21:27:54,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4156, PETRI_PLACES=250, PETRI_TRANSITIONS=306} [2024-06-27 21:27:54,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-27 21:27:54,221 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 306 transitions, 4156 flow [2024-06-27 21:27:54,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:54,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:54,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:54,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:27:54,221 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:54,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash 478154564, now seen corresponding path program 8 times [2024-06-27 21:27:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:54,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14105782] [2024-06-27 21:27:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:54,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:55,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:55,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14105782] [2024-06-27 21:27:55,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14105782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:55,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:55,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:55,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10436884] [2024-06-27 21:27:55,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:55,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:55,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:55,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:55,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:55,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:55,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 306 transitions, 4156 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:55,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:55,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:55,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:56,265 INFO L124 PetriNetUnfolderBase]: 2588/4145 cut-off events. [2024-06-27 21:27:56,265 INFO L125 PetriNetUnfolderBase]: For 303626/303626 co-relation queries the response was YES. [2024-06-27 21:27:56,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35639 conditions, 4145 events. 2588/4145 cut-off events. For 303626/303626 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24066 event pairs, 521 based on Foata normal form. 16/4145 useless extension candidates. Maximal degree in co-relation 35517. Up to 3601 conditions per place. [2024-06-27 21:27:56,304 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 241 selfloop transitions, 96 changer transitions 0/342 dead transitions. [2024-06-27 21:27:56,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 342 transitions, 5041 flow [2024-06-27 21:27:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 21:27:56,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 21:27:56,305 INFO L175 Difference]: Start difference. First operand has 250 places, 306 transitions, 4156 flow. Second operand 10 states and 191 transitions. [2024-06-27 21:27:56,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 342 transitions, 5041 flow [2024-06-27 21:27:56,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 342 transitions, 4772 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:56,778 INFO L231 Difference]: Finished difference. Result has 252 places, 307 transitions, 4130 flow [2024-06-27 21:27:56,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3887, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4130, PETRI_PLACES=252, PETRI_TRANSITIONS=307} [2024-06-27 21:27:56,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 21:27:56,778 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 307 transitions, 4130 flow [2024-06-27 21:27:56,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:56,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:56,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:56,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:27:56,779 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:56,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:56,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1570830976, now seen corresponding path program 9 times [2024-06-27 21:27:56,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:56,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045401434] [2024-06-27 21:27:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:56,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:57,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:57,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045401434] [2024-06-27 21:27:57,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045401434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:57,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:57,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:57,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388340752] [2024-06-27 21:27:57,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:57,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:57,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:57,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:57,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:27:57,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 307 transitions, 4130 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:57,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:57,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:27:57,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:58,828 INFO L124 PetriNetUnfolderBase]: 2772/4478 cut-off events. [2024-06-27 21:27:58,829 INFO L125 PetriNetUnfolderBase]: For 330198/330198 co-relation queries the response was YES. [2024-06-27 21:27:58,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38350 conditions, 4478 events. 2772/4478 cut-off events. For 330198/330198 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26444 event pairs, 448 based on Foata normal form. 12/4482 useless extension candidates. Maximal degree in co-relation 38227. Up to 2673 conditions per place. [2024-06-27 21:27:58,886 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 199 selfloop transitions, 153 changer transitions 0/357 dead transitions. [2024-06-27 21:27:58,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 357 transitions, 5399 flow [2024-06-27 21:27:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:27:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:27:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 21:27:58,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745011086474501 [2024-06-27 21:27:58,887 INFO L175 Difference]: Start difference. First operand has 252 places, 307 transitions, 4130 flow. Second operand 11 states and 214 transitions. [2024-06-27 21:27:58,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 357 transitions, 5399 flow [2024-06-27 21:27:59,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 357 transitions, 5188 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:59,406 INFO L231 Difference]: Finished difference. Result has 256 places, 311 transitions, 4402 flow [2024-06-27 21:27:59,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4402, PETRI_PLACES=256, PETRI_TRANSITIONS=311} [2024-06-27 21:27:59,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-27 21:27:59,407 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 311 transitions, 4402 flow [2024-06-27 21:27:59,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:59,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:59,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:59,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:27:59,407 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:59,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2132951054, now seen corresponding path program 10 times [2024-06-27 21:27:59,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:59,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021836078] [2024-06-27 21:27:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:59,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:00,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:00,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021836078] [2024-06-27 21:28:00,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021836078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:00,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:00,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164989209] [2024-06-27 21:28:00,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:00,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:00,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:00,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:00,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:00,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 311 transitions, 4402 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:00,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:00,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:00,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:01,548 INFO L124 PetriNetUnfolderBase]: 2874/4645 cut-off events. [2024-06-27 21:28:01,548 INFO L125 PetriNetUnfolderBase]: For 362268/362268 co-relation queries the response was YES. [2024-06-27 21:28:01,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41107 conditions, 4645 events. 2874/4645 cut-off events. For 362268/362268 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27899 event pairs, 614 based on Foata normal form. 12/4641 useless extension candidates. Maximal degree in co-relation 40982. Up to 3876 conditions per place. [2024-06-27 21:28:01,605 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 242 selfloop transitions, 106 changer transitions 0/353 dead transitions. [2024-06-27 21:28:01,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 353 transitions, 5619 flow [2024-06-27 21:28:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 21:28:01,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2024-06-27 21:28:01,607 INFO L175 Difference]: Start difference. First operand has 256 places, 311 transitions, 4402 flow. Second operand 10 states and 194 transitions. [2024-06-27 21:28:01,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 353 transitions, 5619 flow [2024-06-27 21:28:02,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 353 transitions, 5375 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 21:28:02,251 INFO L231 Difference]: Finished difference. Result has 259 places, 313 transitions, 4472 flow [2024-06-27 21:28:02,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4472, PETRI_PLACES=259, PETRI_TRANSITIONS=313} [2024-06-27 21:28:02,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 21:28:02,252 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 313 transitions, 4472 flow [2024-06-27 21:28:02,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:02,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:02,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:02,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:28:02,252 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:02,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash -957467850, now seen corresponding path program 11 times [2024-06-27 21:28:02,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:02,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027028467] [2024-06-27 21:28:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:02,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:03,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:03,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027028467] [2024-06-27 21:28:03,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027028467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:03,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:03,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:03,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835710711] [2024-06-27 21:28:03,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:03,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:03,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:03,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:03,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:03,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 313 transitions, 4472 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:03,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:03,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:03,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:04,473 INFO L124 PetriNetUnfolderBase]: 2846/4601 cut-off events. [2024-06-27 21:28:04,473 INFO L125 PetriNetUnfolderBase]: For 351012/351012 co-relation queries the response was YES. [2024-06-27 21:28:04,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39826 conditions, 4601 events. 2846/4601 cut-off events. For 351012/351012 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27665 event pairs, 613 based on Foata normal form. 16/4601 useless extension candidates. Maximal degree in co-relation 39699. Up to 4047 conditions per place. [2024-06-27 21:28:04,536 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 239 selfloop transitions, 104 changer transitions 0/348 dead transitions. [2024-06-27 21:28:04,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 348 transitions, 5327 flow [2024-06-27 21:28:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 21:28:04,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:28:04,541 INFO L175 Difference]: Start difference. First operand has 259 places, 313 transitions, 4472 flow. Second operand 10 states and 190 transitions. [2024-06-27 21:28:04,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 348 transitions, 5327 flow [2024-06-27 21:28:05,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 348 transitions, 5170 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:05,190 INFO L231 Difference]: Finished difference. Result has 263 places, 313 transitions, 4530 flow [2024-06-27 21:28:05,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4315, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4530, PETRI_PLACES=263, PETRI_TRANSITIONS=313} [2024-06-27 21:28:05,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 21:28:05,191 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 313 transitions, 4530 flow [2024-06-27 21:28:05,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:05,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:05,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:05,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:28:05,191 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:05,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:05,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1030922404, now seen corresponding path program 12 times [2024-06-27 21:28:05,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:05,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939542523] [2024-06-27 21:28:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:05,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:06,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939542523] [2024-06-27 21:28:06,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939542523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:06,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:06,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:06,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295323358] [2024-06-27 21:28:06,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:06,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:06,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:06,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:06,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:06,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:06,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 313 transitions, 4530 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:06,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:06,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:07,287 INFO L124 PetriNetUnfolderBase]: 2826/4569 cut-off events. [2024-06-27 21:28:07,287 INFO L125 PetriNetUnfolderBase]: For 334468/334468 co-relation queries the response was YES. [2024-06-27 21:28:07,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39178 conditions, 4569 events. 2826/4569 cut-off events. For 334468/334468 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27365 event pairs, 584 based on Foata normal form. 12/4565 useless extension candidates. Maximal degree in co-relation 39049. Up to 3836 conditions per place. [2024-06-27 21:28:07,342 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 248 selfloop transitions, 98 changer transitions 0/351 dead transitions. [2024-06-27 21:28:07,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 351 transitions, 5429 flow [2024-06-27 21:28:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 21:28:07,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-27 21:28:07,344 INFO L175 Difference]: Start difference. First operand has 263 places, 313 transitions, 4530 flow. Second operand 10 states and 193 transitions. [2024-06-27 21:28:07,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 351 transitions, 5429 flow [2024-06-27 21:28:07,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 351 transitions, 5220 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:28:07,861 INFO L231 Difference]: Finished difference. Result has 265 places, 313 transitions, 4523 flow [2024-06-27 21:28:07,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4523, PETRI_PLACES=265, PETRI_TRANSITIONS=313} [2024-06-27 21:28:07,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 21:28:07,861 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 313 transitions, 4523 flow [2024-06-27 21:28:07,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:07,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:07,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:07,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:28:07,862 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:07,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1957233747, now seen corresponding path program 1 times [2024-06-27 21:28:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:07,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776182138] [2024-06-27 21:28:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:08,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:08,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776182138] [2024-06-27 21:28:08,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776182138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:08,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:08,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:08,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39282100] [2024-06-27 21:28:08,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:08,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:08,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:08,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:28:08,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 313 transitions, 4523 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:08,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:08,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:28:08,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:09,648 INFO L124 PetriNetUnfolderBase]: 2744/4498 cut-off events. [2024-06-27 21:28:09,648 INFO L125 PetriNetUnfolderBase]: For 337515/337527 co-relation queries the response was YES. [2024-06-27 21:28:09,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38872 conditions, 4498 events. 2744/4498 cut-off events. For 337515/337527 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27463 event pairs, 590 based on Foata normal form. 3/4494 useless extension candidates. Maximal degree in co-relation 38742. Up to 4109 conditions per place. [2024-06-27 21:28:09,702 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 51 changer transitions 0/352 dead transitions. [2024-06-27 21:28:09,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 352 transitions, 5821 flow [2024-06-27 21:28:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:28:09,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-27 21:28:09,703 INFO L175 Difference]: Start difference. First operand has 265 places, 313 transitions, 4523 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:28:09,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 352 transitions, 5821 flow [2024-06-27 21:28:10,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 352 transitions, 5336 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-27 21:28:10,262 INFO L231 Difference]: Finished difference. Result has 265 places, 325 transitions, 4385 flow [2024-06-27 21:28:10,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4385, PETRI_PLACES=265, PETRI_TRANSITIONS=325} [2024-06-27 21:28:10,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 21:28:10,262 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 325 transitions, 4385 flow [2024-06-27 21:28:10,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:10,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:10,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:10,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:28:10,263 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:10,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1957323957, now seen corresponding path program 2 times [2024-06-27 21:28:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:10,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459565460] [2024-06-27 21:28:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:10,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:10,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:10,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459565460] [2024-06-27 21:28:10,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459565460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:10,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:10,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:10,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435581251] [2024-06-27 21:28:10,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:10,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:10,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:11,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:28:11,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 325 transitions, 4385 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:11,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:11,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:28:11,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:12,010 INFO L124 PetriNetUnfolderBase]: 2758/4516 cut-off events. [2024-06-27 21:28:12,010 INFO L125 PetriNetUnfolderBase]: For 344269/344281 co-relation queries the response was YES. [2024-06-27 21:28:12,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38318 conditions, 4516 events. 2758/4516 cut-off events. For 344269/344281 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27603 event pairs, 591 based on Foata normal form. 2/4512 useless extension candidates. Maximal degree in co-relation 38188. Up to 4162 conditions per place. [2024-06-27 21:28:12,061 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 283 selfloop transitions, 45 changer transitions 0/350 dead transitions. [2024-06-27 21:28:12,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 350 transitions, 5409 flow [2024-06-27 21:28:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:28:12,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 21:28:12,062 INFO L175 Difference]: Start difference. First operand has 265 places, 325 transitions, 4385 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:28:12,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 350 transitions, 5409 flow [2024-06-27 21:28:12,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 350 transitions, 5315 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 21:28:12,522 INFO L231 Difference]: Finished difference. Result has 270 places, 328 transitions, 4445 flow [2024-06-27 21:28:12,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4445, PETRI_PLACES=270, PETRI_TRANSITIONS=328} [2024-06-27 21:28:12,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-27 21:28:12,524 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 328 transitions, 4445 flow [2024-06-27 21:28:12,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:12,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:12,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:12,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:28:12,524 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:12,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:12,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1542901405, now seen corresponding path program 3 times [2024-06-27 21:28:12,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:12,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352226057] [2024-06-27 21:28:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:12,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:13,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:13,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352226057] [2024-06-27 21:28:13,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352226057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:13,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:13,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:13,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731999925] [2024-06-27 21:28:13,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:13,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:13,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:13,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:13,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:13,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:28:13,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 328 transitions, 4445 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:13,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:13,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:28:13,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:14,390 INFO L124 PetriNetUnfolderBase]: 2763/4521 cut-off events. [2024-06-27 21:28:14,391 INFO L125 PetriNetUnfolderBase]: For 352559/352571 co-relation queries the response was YES. [2024-06-27 21:28:14,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38582 conditions, 4521 events. 2763/4521 cut-off events. For 352559/352571 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27659 event pairs, 597 based on Foata normal form. 2/4517 useless extension candidates. Maximal degree in co-relation 38451. Up to 4210 conditions per place. [2024-06-27 21:28:14,440 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 29 changer transitions 0/348 dead transitions. [2024-06-27 21:28:14,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 348 transitions, 5203 flow [2024-06-27 21:28:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:28:14,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:28:14,441 INFO L175 Difference]: Start difference. First operand has 270 places, 328 transitions, 4445 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:28:14,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 348 transitions, 5203 flow [2024-06-27 21:28:15,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 348 transitions, 5083 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:15,051 INFO L231 Difference]: Finished difference. Result has 272 places, 331 transitions, 4445 flow [2024-06-27 21:28:15,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4445, PETRI_PLACES=272, PETRI_TRANSITIONS=331} [2024-06-27 21:28:15,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-27 21:28:15,051 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 331 transitions, 4445 flow [2024-06-27 21:28:15,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:15,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:15,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:15,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:28:15,052 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:15,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2126321803, now seen corresponding path program 4 times [2024-06-27 21:28:15,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:15,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601790035] [2024-06-27 21:28:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:15,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:15,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:15,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601790035] [2024-06-27 21:28:15,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601790035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:15,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:15,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047723762] [2024-06-27 21:28:15,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:15,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:28:15,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 331 transitions, 4445 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:15,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:15,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:28:15,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:16,882 INFO L124 PetriNetUnfolderBase]: 2762/4520 cut-off events. [2024-06-27 21:28:16,883 INFO L125 PetriNetUnfolderBase]: For 356991/356991 co-relation queries the response was YES. [2024-06-27 21:28:16,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38516 conditions, 4520 events. 2762/4520 cut-off events. For 356991/356991 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27636 event pairs, 597 based on Foata normal form. 3/4517 useless extension candidates. Maximal degree in co-relation 38384. Up to 4194 conditions per place. [2024-06-27 21:28:16,933 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 303 selfloop transitions, 30 changer transitions 0/355 dead transitions. [2024-06-27 21:28:16,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 355 transitions, 5241 flow [2024-06-27 21:28:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 21:28:16,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-27 21:28:16,935 INFO L175 Difference]: Start difference. First operand has 272 places, 331 transitions, 4445 flow. Second operand 7 states and 141 transitions. [2024-06-27 21:28:16,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 355 transitions, 5241 flow [2024-06-27 21:28:17,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 355 transitions, 5149 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:17,527 INFO L231 Difference]: Finished difference. Result has 273 places, 334 transitions, 4485 flow [2024-06-27 21:28:17,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4353, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4485, PETRI_PLACES=273, PETRI_TRANSITIONS=334} [2024-06-27 21:28:17,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-27 21:28:17,527 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 334 transitions, 4485 flow [2024-06-27 21:28:17,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:17,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:17,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:17,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:28:17,528 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:17,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2118697291, now seen corresponding path program 1 times [2024-06-27 21:28:17,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:17,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754241519] [2024-06-27 21:28:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:17,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:18,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:18,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754241519] [2024-06-27 21:28:18,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754241519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:18,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:18,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:18,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209701204] [2024-06-27 21:28:18,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:18,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:18,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:18,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:18,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:18,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:18,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 334 transitions, 4485 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:18,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:18,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:18,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:19,180 INFO L124 PetriNetUnfolderBase]: 2867/4633 cut-off events. [2024-06-27 21:28:19,180 INFO L125 PetriNetUnfolderBase]: For 360082/360082 co-relation queries the response was YES. [2024-06-27 21:28:19,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39319 conditions, 4633 events. 2867/4633 cut-off events. For 360082/360082 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27889 event pairs, 628 based on Foata normal form. 1/4631 useless extension candidates. Maximal degree in co-relation 39186. Up to 4427 conditions per place. [2024-06-27 21:28:19,235 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 313 selfloop transitions, 27 changer transitions 0/345 dead transitions. [2024-06-27 21:28:19,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 345 transitions, 5203 flow [2024-06-27 21:28:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:28:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:28:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-27 21:28:19,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 21:28:19,236 INFO L175 Difference]: Start difference. First operand has 273 places, 334 transitions, 4485 flow. Second operand 5 states and 100 transitions. [2024-06-27 21:28:19,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 345 transitions, 5203 flow [2024-06-27 21:28:19,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 345 transitions, 5089 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:19,985 INFO L231 Difference]: Finished difference. Result has 273 places, 334 transitions, 4446 flow [2024-06-27 21:28:19,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4371, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4446, PETRI_PLACES=273, PETRI_TRANSITIONS=334} [2024-06-27 21:28:19,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-27 21:28:19,985 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 334 transitions, 4446 flow [2024-06-27 21:28:19,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:19,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:19,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:19,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:28:19,986 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:19,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:19,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1931613270, now seen corresponding path program 1 times [2024-06-27 21:28:19,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:19,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448753160] [2024-06-27 21:28:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:19,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:20,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:20,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448753160] [2024-06-27 21:28:20,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448753160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:20,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:20,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:20,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077923042] [2024-06-27 21:28:20,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:20,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:20,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:20,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:21,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:21,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 334 transitions, 4446 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:21,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:21,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:21,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:22,117 INFO L124 PetriNetUnfolderBase]: 2908/4702 cut-off events. [2024-06-27 21:28:22,118 INFO L125 PetriNetUnfolderBase]: For 387895/387895 co-relation queries the response was YES. [2024-06-27 21:28:22,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39805 conditions, 4702 events. 2908/4702 cut-off events. For 387895/387895 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28389 event pairs, 609 based on Foata normal form. 12/4711 useless extension candidates. Maximal degree in co-relation 39671. Up to 4377 conditions per place. [2024-06-27 21:28:22,273 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 33 changer transitions 0/371 dead transitions. [2024-06-27 21:28:22,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 371 transitions, 5347 flow [2024-06-27 21:28:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 21:28:22,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-27 21:28:22,274 INFO L175 Difference]: Start difference. First operand has 273 places, 334 transitions, 4446 flow. Second operand 10 states and 186 transitions. [2024-06-27 21:28:22,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 371 transitions, 5347 flow [2024-06-27 21:28:22,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 371 transitions, 5293 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:22,896 INFO L231 Difference]: Finished difference. Result has 279 places, 335 transitions, 4497 flow [2024-06-27 21:28:22,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4392, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4497, PETRI_PLACES=279, PETRI_TRANSITIONS=335} [2024-06-27 21:28:22,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-27 21:28:22,897 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 335 transitions, 4497 flow [2024-06-27 21:28:22,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:22,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:22,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:22,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:28:22,897 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:22,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:22,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1712264840, now seen corresponding path program 2 times [2024-06-27 21:28:22,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:22,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496193388] [2024-06-27 21:28:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:22,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:23,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:23,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496193388] [2024-06-27 21:28:23,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496193388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:23,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:23,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:23,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257986751] [2024-06-27 21:28:23,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:23,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:23,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:24,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:24,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 335 transitions, 4497 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:24,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:24,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:24,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:25,115 INFO L124 PetriNetUnfolderBase]: 2888/4670 cut-off events. [2024-06-27 21:28:25,116 INFO L125 PetriNetUnfolderBase]: For 376977/376977 co-relation queries the response was YES. [2024-06-27 21:28:25,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39121 conditions, 4670 events. 2888/4670 cut-off events. For 376977/376977 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28131 event pairs, 597 based on Foata normal form. 12/4679 useless extension candidates. Maximal degree in co-relation 38986. Up to 4345 conditions per place. [2024-06-27 21:28:25,175 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 33 changer transitions 0/371 dead transitions. [2024-06-27 21:28:25,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 371 transitions, 5367 flow [2024-06-27 21:28:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:25,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 21:28:25,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-27 21:28:25,176 INFO L175 Difference]: Start difference. First operand has 279 places, 335 transitions, 4497 flow. Second operand 10 states and 186 transitions. [2024-06-27 21:28:25,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 371 transitions, 5367 flow [2024-06-27 21:28:25,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 371 transitions, 5285 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 21:28:25,926 INFO L231 Difference]: Finished difference. Result has 281 places, 335 transitions, 4487 flow [2024-06-27 21:28:25,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4415, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4487, PETRI_PLACES=281, PETRI_TRANSITIONS=335} [2024-06-27 21:28:25,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 21:28:25,926 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 335 transitions, 4487 flow [2024-06-27 21:28:25,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:25,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:25,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:25,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:28:25,927 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:25,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:25,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1716848810, now seen corresponding path program 3 times [2024-06-27 21:28:25,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:25,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833320787] [2024-06-27 21:28:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:25,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:27,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:27,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833320787] [2024-06-27 21:28:27,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833320787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:27,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:27,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:27,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641345438] [2024-06-27 21:28:27,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:27,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:27,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:27,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:27,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:27,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 335 transitions, 4487 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:27,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:27,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:27,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:28,431 INFO L124 PetriNetUnfolderBase]: 2929/4741 cut-off events. [2024-06-27 21:28:28,431 INFO L125 PetriNetUnfolderBase]: For 389445/389445 co-relation queries the response was YES. [2024-06-27 21:28:28,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39680 conditions, 4741 events. 2929/4741 cut-off events. For 389445/389445 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 28761 event pairs, 593 based on Foata normal form. 12/4750 useless extension candidates. Maximal degree in co-relation 39544. Up to 4357 conditions per place. [2024-06-27 21:28:28,484 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 330 selfloop transitions, 38 changer transitions 0/373 dead transitions. [2024-06-27 21:28:28,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 373 transitions, 5405 flow [2024-06-27 21:28:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 21:28:28,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-27 21:28:28,485 INFO L175 Difference]: Start difference. First operand has 281 places, 335 transitions, 4487 flow. Second operand 10 states and 187 transitions. [2024-06-27 21:28:28,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 373 transitions, 5405 flow [2024-06-27 21:28:29,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 373 transitions, 5269 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 21:28:29,222 INFO L231 Difference]: Finished difference. Result has 281 places, 336 transitions, 4477 flow [2024-06-27 21:28:29,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4351, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4477, PETRI_PLACES=281, PETRI_TRANSITIONS=336} [2024-06-27 21:28:29,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 21:28:29,222 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 336 transitions, 4477 flow [2024-06-27 21:28:29,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:29,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:29,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:29,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:28:29,223 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:29,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:29,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1052177236, now seen corresponding path program 4 times [2024-06-27 21:28:29,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:29,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780491976] [2024-06-27 21:28:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:29,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:30,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:30,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780491976] [2024-06-27 21:28:30,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780491976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:30,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:30,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:30,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520359019] [2024-06-27 21:28:30,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:30,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:30,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:30,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:30,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:30,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:30,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 336 transitions, 4477 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:30,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:30,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:30,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:31,557 INFO L124 PetriNetUnfolderBase]: 2970/4812 cut-off events. [2024-06-27 21:28:31,557 INFO L125 PetriNetUnfolderBase]: For 398717/398717 co-relation queries the response was YES. [2024-06-27 21:28:31,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40130 conditions, 4812 events. 2970/4812 cut-off events. For 398717/398717 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 29288 event pairs, 608 based on Foata normal form. 12/4821 useless extension candidates. Maximal degree in co-relation 39994. Up to 4397 conditions per place. [2024-06-27 21:28:31,616 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 298 selfloop transitions, 72 changer transitions 0/375 dead transitions. [2024-06-27 21:28:31,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 375 transitions, 5405 flow [2024-06-27 21:28:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 21:28:31,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-27 21:28:31,617 INFO L175 Difference]: Start difference. First operand has 281 places, 336 transitions, 4477 flow. Second operand 10 states and 187 transitions. [2024-06-27 21:28:31,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 375 transitions, 5405 flow [2024-06-27 21:28:32,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 375 transitions, 5307 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 21:28:32,426 INFO L231 Difference]: Finished difference. Result has 283 places, 337 transitions, 4575 flow [2024-06-27 21:28:32,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4379, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4575, PETRI_PLACES=283, PETRI_TRANSITIONS=337} [2024-06-27 21:28:32,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-27 21:28:32,427 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 337 transitions, 4575 flow [2024-06-27 21:28:32,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:32,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:32,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:32,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:28:32,428 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:32,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:32,428 INFO L85 PathProgramCache]: Analyzing trace with hash -360896120, now seen corresponding path program 5 times [2024-06-27 21:28:32,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:32,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452614538] [2024-06-27 21:28:32,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:32,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:33,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:33,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452614538] [2024-06-27 21:28:33,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452614538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:33,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:33,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:33,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033838590] [2024-06-27 21:28:33,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:33,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:33,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:33,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:33,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:33,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:33,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 337 transitions, 4575 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:33,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:33,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:33,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:34,812 INFO L124 PetriNetUnfolderBase]: 3011/4883 cut-off events. [2024-06-27 21:28:34,812 INFO L125 PetriNetUnfolderBase]: For 411464/411464 co-relation queries the response was YES. [2024-06-27 21:28:34,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40788 conditions, 4883 events. 3011/4883 cut-off events. For 411464/411464 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29867 event pairs, 611 based on Foata normal form. 12/4892 useless extension candidates. Maximal degree in co-relation 40651. Up to 4408 conditions per place. [2024-06-27 21:28:34,873 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 302 selfloop transitions, 70 changer transitions 0/377 dead transitions. [2024-06-27 21:28:34,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 377 transitions, 5511 flow [2024-06-27 21:28:34,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 21:28:34,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-27 21:28:34,874 INFO L175 Difference]: Start difference. First operand has 283 places, 337 transitions, 4575 flow. Second operand 10 states and 189 transitions. [2024-06-27 21:28:34,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 377 transitions, 5511 flow [2024-06-27 21:28:35,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 377 transitions, 5343 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 21:28:35,629 INFO L231 Difference]: Finished difference. Result has 285 places, 338 transitions, 4601 flow [2024-06-27 21:28:35,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4407, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4601, PETRI_PLACES=285, PETRI_TRANSITIONS=338} [2024-06-27 21:28:35,630 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-27 21:28:35,630 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 338 transitions, 4601 flow [2024-06-27 21:28:35,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:35,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:35,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:35,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:28:35,630 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:35,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:35,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1697945294, now seen corresponding path program 6 times [2024-06-27 21:28:35,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:35,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665436255] [2024-06-27 21:28:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:35,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:36,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665436255] [2024-06-27 21:28:36,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665436255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:36,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:36,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:36,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689931095] [2024-06-27 21:28:36,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:36,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:36,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:36,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 338 transitions, 4601 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:36,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:36,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:36,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:37,700 INFO L124 PetriNetUnfolderBase]: 3052/4956 cut-off events. [2024-06-27 21:28:37,700 INFO L125 PetriNetUnfolderBase]: For 423438/423438 co-relation queries the response was YES. [2024-06-27 21:28:37,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41359 conditions, 4956 events. 3052/4956 cut-off events. For 423438/423438 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30314 event pairs, 623 based on Foata normal form. 12/4965 useless extension candidates. Maximal degree in co-relation 41221. Up to 4563 conditions per place. [2024-06-27 21:28:37,762 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 332 selfloop transitions, 42 changer transitions 0/379 dead transitions. [2024-06-27 21:28:37,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 379 transitions, 5545 flow [2024-06-27 21:28:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 21:28:37,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-27 21:28:37,763 INFO L175 Difference]: Start difference. First operand has 285 places, 338 transitions, 4601 flow. Second operand 10 states and 187 transitions. [2024-06-27 21:28:37,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 379 transitions, 5545 flow [2024-06-27 21:28:38,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 379 transitions, 5379 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 21:28:38,554 INFO L231 Difference]: Finished difference. Result has 287 places, 339 transitions, 4575 flow [2024-06-27 21:28:38,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4435, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4575, PETRI_PLACES=287, PETRI_TRANSITIONS=339} [2024-06-27 21:28:38,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-27 21:28:38,555 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 339 transitions, 4575 flow [2024-06-27 21:28:38,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:38,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:38,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:38,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:28:38,555 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:38,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:38,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1375671492, now seen corresponding path program 1 times [2024-06-27 21:28:38,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:38,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914970272] [2024-06-27 21:28:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:38,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:39,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:39,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914970272] [2024-06-27 21:28:39,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914970272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:39,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:39,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654400323] [2024-06-27 21:28:39,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:39,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:39,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:39,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 339 transitions, 4575 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:39,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:39,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:39,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:40,208 INFO L124 PetriNetUnfolderBase]: 3078/4990 cut-off events. [2024-06-27 21:28:40,208 INFO L125 PetriNetUnfolderBase]: For 418684/418684 co-relation queries the response was YES. [2024-06-27 21:28:40,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41856 conditions, 4990 events. 3078/4990 cut-off events. For 418684/418684 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30622 event pairs, 671 based on Foata normal form. 2/4989 useless extension candidates. Maximal degree in co-relation 41717. Up to 4706 conditions per place. [2024-06-27 21:28:40,268 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 42 changer transitions 0/369 dead transitions. [2024-06-27 21:28:40,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 369 transitions, 5737 flow [2024-06-27 21:28:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:28:40,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 21:28:40,269 INFO L175 Difference]: Start difference. First operand has 287 places, 339 transitions, 4575 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:28:40,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 369 transitions, 5737 flow [2024-06-27 21:28:41,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 369 transitions, 5625 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:28:41,120 INFO L231 Difference]: Finished difference. Result has 287 places, 345 transitions, 4729 flow [2024-06-27 21:28:41,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4463, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4729, PETRI_PLACES=287, PETRI_TRANSITIONS=345} [2024-06-27 21:28:41,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-27 21:28:41,120 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 345 transitions, 4729 flow [2024-06-27 21:28:41,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:41,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:41,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:41,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:28:41,120 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:41,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:41,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1756718656, now seen corresponding path program 2 times [2024-06-27 21:28:41,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:41,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746063335] [2024-06-27 21:28:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:41,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:41,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:41,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746063335] [2024-06-27 21:28:41,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746063335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:41,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:41,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:41,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939844396] [2024-06-27 21:28:41,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:41,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:41,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:41,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:41,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:41,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 345 transitions, 4729 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:41,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:41,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:41,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:42,831 INFO L124 PetriNetUnfolderBase]: 3098/5022 cut-off events. [2024-06-27 21:28:42,832 INFO L125 PetriNetUnfolderBase]: For 430751/430751 co-relation queries the response was YES. [2024-06-27 21:28:42,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42431 conditions, 5022 events. 3098/5022 cut-off events. For 430751/430751 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30892 event pairs, 672 based on Foata normal form. 2/5021 useless extension candidates. Maximal degree in co-relation 42291. Up to 4770 conditions per place. [2024-06-27 21:28:42,899 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 330 selfloop transitions, 38 changer transitions 0/373 dead transitions. [2024-06-27 21:28:42,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 373 transitions, 5701 flow [2024-06-27 21:28:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:28:42,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:28:42,900 INFO L175 Difference]: Start difference. First operand has 287 places, 345 transitions, 4729 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:28:42,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 373 transitions, 5701 flow [2024-06-27 21:28:43,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 373 transitions, 5561 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:43,770 INFO L231 Difference]: Finished difference. Result has 291 places, 353 transitions, 4823 flow [2024-06-27 21:28:43,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4823, PETRI_PLACES=291, PETRI_TRANSITIONS=353} [2024-06-27 21:28:43,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-27 21:28:43,770 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 353 transitions, 4823 flow [2024-06-27 21:28:43,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:43,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:43,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:43,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:28:43,771 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:43,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:43,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1726241486, now seen corresponding path program 1 times [2024-06-27 21:28:43,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:43,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400002457] [2024-06-27 21:28:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:43,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:44,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:44,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400002457] [2024-06-27 21:28:44,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400002457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:44,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:44,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:44,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941342457] [2024-06-27 21:28:44,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:44,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:44,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:44,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:44,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:44,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:44,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 353 transitions, 4823 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:44,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:44,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:44,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:45,442 INFO L124 PetriNetUnfolderBase]: 3150/5098 cut-off events. [2024-06-27 21:28:45,442 INFO L125 PetriNetUnfolderBase]: For 458087/458087 co-relation queries the response was YES. [2024-06-27 21:28:45,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43470 conditions, 5098 events. 3150/5098 cut-off events. For 458087/458087 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 31377 event pairs, 673 based on Foata normal form. 4/5099 useless extension candidates. Maximal degree in co-relation 43328. Up to 4792 conditions per place. [2024-06-27 21:28:45,509 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 339 selfloop transitions, 44 changer transitions 0/388 dead transitions. [2024-06-27 21:28:45,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 388 transitions, 6048 flow [2024-06-27 21:28:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 21:28:45,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-27 21:28:45,509 INFO L175 Difference]: Start difference. First operand has 291 places, 353 transitions, 4823 flow. Second operand 8 states and 154 transitions. [2024-06-27 21:28:45,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 388 transitions, 6048 flow [2024-06-27 21:28:46,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 388 transitions, 5931 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:46,391 INFO L231 Difference]: Finished difference. Result has 296 places, 364 transitions, 5022 flow [2024-06-27 21:28:46,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4706, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5022, PETRI_PLACES=296, PETRI_TRANSITIONS=364} [2024-06-27 21:28:46,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-27 21:28:46,391 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 364 transitions, 5022 flow [2024-06-27 21:28:46,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:46,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:46,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:46,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:28:46,392 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:46,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:46,392 INFO L85 PathProgramCache]: Analyzing trace with hash -569597766, now seen corresponding path program 2 times [2024-06-27 21:28:46,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:46,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819312002] [2024-06-27 21:28:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:46,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:46,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:46,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819312002] [2024-06-27 21:28:46,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819312002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:46,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:46,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:46,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959014912] [2024-06-27 21:28:46,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:46,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:46,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:46,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:46,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:46,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 364 transitions, 5022 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:46,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:46,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:46,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:48,117 INFO L124 PetriNetUnfolderBase]: 3212/5200 cut-off events. [2024-06-27 21:28:48,117 INFO L125 PetriNetUnfolderBase]: For 486003/486003 co-relation queries the response was YES. [2024-06-27 21:28:48,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45354 conditions, 5200 events. 3212/5200 cut-off events. For 486003/486003 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 32193 event pairs, 682 based on Foata normal form. 4/5201 useless extension candidates. Maximal degree in co-relation 45210. Up to 4922 conditions per place. [2024-06-27 21:28:48,181 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 352 selfloop transitions, 42 changer transitions 0/399 dead transitions. [2024-06-27 21:28:48,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 399 transitions, 6338 flow [2024-06-27 21:28:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:28:48,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 21:28:48,182 INFO L175 Difference]: Start difference. First operand has 296 places, 364 transitions, 5022 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:28:48,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 399 transitions, 6338 flow [2024-06-27 21:28:49,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 399 transitions, 6182 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-27 21:28:49,209 INFO L231 Difference]: Finished difference. Result has 302 places, 378 transitions, 5244 flow [2024-06-27 21:28:49,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4912, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5244, PETRI_PLACES=302, PETRI_TRANSITIONS=378} [2024-06-27 21:28:49,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-27 21:28:49,209 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 378 transitions, 5244 flow [2024-06-27 21:28:49,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:49,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:49,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:49,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:28:49,210 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:49,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash -569597952, now seen corresponding path program 3 times [2024-06-27 21:28:49,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:49,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167693823] [2024-06-27 21:28:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:49,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:49,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167693823] [2024-06-27 21:28:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167693823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:49,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464683817] [2024-06-27 21:28:49,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:49,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:49,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:49,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:49,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 378 transitions, 5244 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:49,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:49,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:49,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:50,965 INFO L124 PetriNetUnfolderBase]: 3222/5214 cut-off events. [2024-06-27 21:28:50,965 INFO L125 PetriNetUnfolderBase]: For 490381/490381 co-relation queries the response was YES. [2024-06-27 21:28:51,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45463 conditions, 5214 events. 3222/5214 cut-off events. For 490381/490381 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32223 event pairs, 680 based on Foata normal form. 2/5213 useless extension candidates. Maximal degree in co-relation 45316. Up to 4978 conditions per place. [2024-06-27 21:28:51,037 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 32 changer transitions 0/398 dead transitions. [2024-06-27 21:28:51,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 398 transitions, 6193 flow [2024-06-27 21:28:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:28:51,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 21:28:51,038 INFO L175 Difference]: Start difference. First operand has 302 places, 378 transitions, 5244 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:28:51,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 398 transitions, 6193 flow [2024-06-27 21:28:51,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 398 transitions, 6096 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 21:28:51,983 INFO L231 Difference]: Finished difference. Result has 307 places, 381 transitions, 5308 flow [2024-06-27 21:28:51,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5308, PETRI_PLACES=307, PETRI_TRANSITIONS=381} [2024-06-27 21:28:51,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-27 21:28:51,984 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 381 transitions, 5308 flow [2024-06-27 21:28:51,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:51,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:51,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:51,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:28:51,984 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:51,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:51,985 INFO L85 PathProgramCache]: Analyzing trace with hash -742081146, now seen corresponding path program 3 times [2024-06-27 21:28:51,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:51,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979925862] [2024-06-27 21:28:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:51,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:52,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:52,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979925862] [2024-06-27 21:28:52,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979925862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:52,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:52,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:52,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543688387] [2024-06-27 21:28:52,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:52,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:52,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:52,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:52,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:52,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 381 transitions, 5308 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:52,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:52,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:52,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:53,695 INFO L124 PetriNetUnfolderBase]: 3210/5190 cut-off events. [2024-06-27 21:28:53,695 INFO L125 PetriNetUnfolderBase]: For 491668/491668 co-relation queries the response was YES. [2024-06-27 21:28:53,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45095 conditions, 5190 events. 3210/5190 cut-off events. For 491668/491668 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 31958 event pairs, 675 based on Foata normal form. 4/5191 useless extension candidates. Maximal degree in co-relation 44946. Up to 4950 conditions per place. [2024-06-27 21:28:53,765 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 358 selfloop transitions, 35 changer transitions 0/398 dead transitions. [2024-06-27 21:28:53,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 398 transitions, 6172 flow [2024-06-27 21:28:53,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:28:53,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:28:53,766 INFO L175 Difference]: Start difference. First operand has 307 places, 381 transitions, 5308 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:28:53,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 398 transitions, 6172 flow [2024-06-27 21:28:54,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 398 transitions, 6017 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:54,917 INFO L231 Difference]: Finished difference. Result has 311 places, 381 transitions, 5229 flow [2024-06-27 21:28:54,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5153, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5229, PETRI_PLACES=311, PETRI_TRANSITIONS=381} [2024-06-27 21:28:54,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-27 21:28:54,918 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 381 transitions, 5229 flow [2024-06-27 21:28:54,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:54,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:54,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:54,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:28:54,918 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:54,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:54,919 INFO L85 PathProgramCache]: Analyzing trace with hash -569351688, now seen corresponding path program 1 times [2024-06-27 21:28:54,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:54,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715992743] [2024-06-27 21:28:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:54,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:55,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:55,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715992743] [2024-06-27 21:28:55,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715992743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:55,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:55,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:55,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50771110] [2024-06-27 21:28:55,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:55,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:55,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:55,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:55,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:55,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:55,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 381 transitions, 5229 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:55,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:55,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:55,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:57,171 INFO L124 PetriNetUnfolderBase]: 3254/5256 cut-off events. [2024-06-27 21:28:57,172 INFO L125 PetriNetUnfolderBase]: For 524677/524677 co-relation queries the response was YES. [2024-06-27 21:28:57,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45470 conditions, 5256 events. 3254/5256 cut-off events. For 524677/524677 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32406 event pairs, 667 based on Foata normal form. 12/5265 useless extension candidates. Maximal degree in co-relation 45320. Up to 4880 conditions per place. [2024-06-27 21:28:57,240 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 344 selfloop transitions, 58 changer transitions 0/407 dead transitions. [2024-06-27 21:28:57,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 407 transitions, 6243 flow [2024-06-27 21:28:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:28:57,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 21:28:57,241 INFO L175 Difference]: Start difference. First operand has 311 places, 381 transitions, 5229 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:28:57,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 407 transitions, 6243 flow [2024-06-27 21:28:58,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 407 transitions, 6155 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:28:58,212 INFO L231 Difference]: Finished difference. Result has 312 places, 382 transitions, 5276 flow [2024-06-27 21:28:58,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5276, PETRI_PLACES=312, PETRI_TRANSITIONS=382} [2024-06-27 21:28:58,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-27 21:28:58,213 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 382 transitions, 5276 flow [2024-06-27 21:28:58,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:58,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:58,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:58,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:28:58,213 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:58,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash -178167502, now seen corresponding path program 7 times [2024-06-27 21:28:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517677788] [2024-06-27 21:28:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:59,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:59,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517677788] [2024-06-27 21:28:59,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517677788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:59,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:59,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:59,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644128202] [2024-06-27 21:28:59,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:59,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:59,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:59,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:59,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:28:59,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 382 transitions, 5276 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:59,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:59,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:28:59,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:00,616 INFO L124 PetriNetUnfolderBase]: 3234/5217 cut-off events. [2024-06-27 21:29:00,616 INFO L125 PetriNetUnfolderBase]: For 502701/502701 co-relation queries the response was YES. [2024-06-27 21:29:00,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44658 conditions, 5217 events. 3234/5217 cut-off events. For 502701/502701 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32143 event pairs, 636 based on Foata normal form. 12/5221 useless extension candidates. Maximal degree in co-relation 44507. Up to 4749 conditions per place. [2024-06-27 21:29:00,683 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 358 selfloop transitions, 53 changer transitions 0/416 dead transitions. [2024-06-27 21:29:00,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 416 transitions, 6110 flow [2024-06-27 21:29:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 21:29:00,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-27 21:29:00,684 INFO L175 Difference]: Start difference. First operand has 312 places, 382 transitions, 5276 flow. Second operand 10 states and 187 transitions. [2024-06-27 21:29:00,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 416 transitions, 6110 flow [2024-06-27 21:29:01,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 416 transitions, 5993 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:01,918 INFO L231 Difference]: Finished difference. Result has 315 places, 381 transitions, 5147 flow [2024-06-27 21:29:01,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5037, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5147, PETRI_PLACES=315, PETRI_TRANSITIONS=381} [2024-06-27 21:29:01,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-27 21:29:01,919 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 381 transitions, 5147 flow [2024-06-27 21:29:01,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:01,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:01,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:01,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:29:01,920 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:01,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:01,920 INFO L85 PathProgramCache]: Analyzing trace with hash 201122388, now seen corresponding path program 4 times [2024-06-27 21:29:01,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:01,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116010653] [2024-06-27 21:29:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:01,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:02,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:02,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116010653] [2024-06-27 21:29:02,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116010653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:02,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:02,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:02,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450860314] [2024-06-27 21:29:02,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:02,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:02,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:02,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:02,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:02,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:02,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 381 transitions, 5147 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:02,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:02,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:02,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:03,669 INFO L124 PetriNetUnfolderBase]: 3268/5272 cut-off events. [2024-06-27 21:29:03,669 INFO L125 PetriNetUnfolderBase]: For 500335/500335 co-relation queries the response was YES. [2024-06-27 21:29:03,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45664 conditions, 5272 events. 3268/5272 cut-off events. For 500335/500335 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 32570 event pairs, 679 based on Foata normal form. 2/5264 useless extension candidates. Maximal degree in co-relation 45512. Up to 4809 conditions per place. [2024-06-27 21:29:03,743 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 336 selfloop transitions, 83 changer transitions 0/424 dead transitions. [2024-06-27 21:29:03,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 424 transitions, 6998 flow [2024-06-27 21:29:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:29:03,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 21:29:03,744 INFO L175 Difference]: Start difference. First operand has 315 places, 381 transitions, 5147 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:29:03,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 424 transitions, 6998 flow [2024-06-27 21:29:05,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 424 transitions, 6718 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-27 21:29:05,160 INFO L231 Difference]: Finished difference. Result has 313 places, 397 transitions, 5463 flow [2024-06-27 21:29:05,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4869, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5463, PETRI_PLACES=313, PETRI_TRANSITIONS=397} [2024-06-27 21:29:05,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-27 21:29:05,161 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 397 transitions, 5463 flow [2024-06-27 21:29:05,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:05,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:05,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:05,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:29:05,162 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:05,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:05,162 INFO L85 PathProgramCache]: Analyzing trace with hash 535111292, now seen corresponding path program 5 times [2024-06-27 21:29:05,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:05,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528741738] [2024-06-27 21:29:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:05,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:05,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:05,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528741738] [2024-06-27 21:29:05,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528741738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:05,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:05,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:05,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691007339] [2024-06-27 21:29:05,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:05,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:05,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:05,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:05,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:05,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:05,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 397 transitions, 5463 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:05,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:05,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:05,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:06,892 INFO L124 PetriNetUnfolderBase]: 3278/5286 cut-off events. [2024-06-27 21:29:06,892 INFO L125 PetriNetUnfolderBase]: For 514895/514895 co-relation queries the response was YES. [2024-06-27 21:29:06,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45758 conditions, 5286 events. 3278/5286 cut-off events. For 514895/514895 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32674 event pairs, 674 based on Foata normal form. 2/5278 useless extension candidates. Maximal degree in co-relation 45607. Up to 4819 conditions per place. [2024-06-27 21:29:06,966 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 94 changer transitions 0/425 dead transitions. [2024-06-27 21:29:06,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 425 transitions, 6874 flow [2024-06-27 21:29:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 21:29:06,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-27 21:29:06,967 INFO L175 Difference]: Start difference. First operand has 313 places, 397 transitions, 5463 flow. Second operand 8 states and 154 transitions. [2024-06-27 21:29:06,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 425 transitions, 6874 flow [2024-06-27 21:29:08,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 425 transitions, 6701 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-06-27 21:29:08,308 INFO L231 Difference]: Finished difference. Result has 319 places, 400 transitions, 5583 flow [2024-06-27 21:29:08,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5583, PETRI_PLACES=319, PETRI_TRANSITIONS=400} [2024-06-27 21:29:08,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-27 21:29:08,308 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 400 transitions, 5583 flow [2024-06-27 21:29:08,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:08,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:08,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:08,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:29:08,309 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:08,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:08,309 INFO L85 PathProgramCache]: Analyzing trace with hash 470003058, now seen corresponding path program 6 times [2024-06-27 21:29:08,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:08,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193527243] [2024-06-27 21:29:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:08,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:08,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:08,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193527243] [2024-06-27 21:29:08,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193527243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:08,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:08,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:08,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625061404] [2024-06-27 21:29:08,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:08,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:08,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:08,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:08,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:08,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:08,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 400 transitions, 5583 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:08,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:08,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:08,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:09,993 INFO L124 PetriNetUnfolderBase]: 3288/5308 cut-off events. [2024-06-27 21:29:09,993 INFO L125 PetriNetUnfolderBase]: For 524063/524063 co-relation queries the response was YES. [2024-06-27 21:29:10,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46054 conditions, 5308 events. 3288/5308 cut-off events. For 524063/524063 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32894 event pairs, 678 based on Foata normal form. 2/5300 useless extension candidates. Maximal degree in co-relation 45901. Up to 4829 conditions per place. [2024-06-27 21:29:10,070 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 318 selfloop transitions, 101 changer transitions 0/424 dead transitions. [2024-06-27 21:29:10,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 424 transitions, 6822 flow [2024-06-27 21:29:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:29:10,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 21:29:10,071 INFO L175 Difference]: Start difference. First operand has 319 places, 400 transitions, 5583 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:29:10,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 424 transitions, 6822 flow [2024-06-27 21:29:11,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 424 transitions, 6562 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:11,660 INFO L231 Difference]: Finished difference. Result has 321 places, 404 transitions, 5638 flow [2024-06-27 21:29:11,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5638, PETRI_PLACES=321, PETRI_TRANSITIONS=404} [2024-06-27 21:29:11,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-27 21:29:11,660 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 404 transitions, 5638 flow [2024-06-27 21:29:11,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:11,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:11,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:11,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:29:11,661 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:11,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:11,662 INFO L85 PathProgramCache]: Analyzing trace with hash 278730752, now seen corresponding path program 7 times [2024-06-27 21:29:11,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:11,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445485679] [2024-06-27 21:29:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:11,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:12,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:12,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445485679] [2024-06-27 21:29:12,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445485679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:12,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:12,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:12,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764522485] [2024-06-27 21:29:12,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:12,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:12,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:12,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:12,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:12,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:12,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 404 transitions, 5638 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:12,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:12,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:12,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:13,579 INFO L124 PetriNetUnfolderBase]: 3308/5342 cut-off events. [2024-06-27 21:29:13,579 INFO L125 PetriNetUnfolderBase]: For 535470/535470 co-relation queries the response was YES. [2024-06-27 21:29:13,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46274 conditions, 5342 events. 3308/5342 cut-off events. For 535470/535470 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33157 event pairs, 681 based on Foata normal form. 2/5334 useless extension candidates. Maximal degree in co-relation 46121. Up to 5012 conditions per place. [2024-06-27 21:29:13,644 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 364 selfloop transitions, 61 changer transitions 0/430 dead transitions. [2024-06-27 21:29:13,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 430 transitions, 6703 flow [2024-06-27 21:29:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:29:13,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 21:29:13,645 INFO L175 Difference]: Start difference. First operand has 321 places, 404 transitions, 5638 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:29:13,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 430 transitions, 6703 flow [2024-06-27 21:29:15,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 430 transitions, 6495 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:15,231 INFO L231 Difference]: Finished difference. Result has 325 places, 412 transitions, 5695 flow [2024-06-27 21:29:15,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5441, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5695, PETRI_PLACES=325, PETRI_TRANSITIONS=412} [2024-06-27 21:29:15,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-27 21:29:15,231 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 412 transitions, 5695 flow [2024-06-27 21:29:15,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:15,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:15,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:15,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:29:15,232 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:15,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash 278730938, now seen corresponding path program 4 times [2024-06-27 21:29:15,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:15,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764827772] [2024-06-27 21:29:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:15,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:15,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:15,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764827772] [2024-06-27 21:29:15,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764827772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:15,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:15,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:15,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583305669] [2024-06-27 21:29:15,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:15,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:15,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:15,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:15,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 412 transitions, 5695 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:15,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:15,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:15,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:17,012 INFO L124 PetriNetUnfolderBase]: 3352/5411 cut-off events. [2024-06-27 21:29:17,012 INFO L125 PetriNetUnfolderBase]: For 565094/565094 co-relation queries the response was YES. [2024-06-27 21:29:17,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47111 conditions, 5411 events. 3352/5411 cut-off events. For 565094/565094 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 33648 event pairs, 679 based on Foata normal form. 4/5405 useless extension candidates. Maximal degree in co-relation 46957. Up to 4933 conditions per place. [2024-06-27 21:29:17,089 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 359 selfloop transitions, 79 changer transitions 0/443 dead transitions. [2024-06-27 21:29:17,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 443 transitions, 7214 flow [2024-06-27 21:29:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:29:17,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-27 21:29:17,090 INFO L175 Difference]: Start difference. First operand has 325 places, 412 transitions, 5695 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:29:17,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 443 transitions, 7214 flow [2024-06-27 21:29:18,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 443 transitions, 7053 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:18,856 INFO L231 Difference]: Finished difference. Result has 329 places, 418 transitions, 5857 flow [2024-06-27 21:29:18,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5534, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5857, PETRI_PLACES=329, PETRI_TRANSITIONS=418} [2024-06-27 21:29:18,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-27 21:29:18,856 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 418 transitions, 5857 flow [2024-06-27 21:29:18,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:18,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:18,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:18,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:29:18,857 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:18,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:18,857 INFO L85 PathProgramCache]: Analyzing trace with hash 662961368, now seen corresponding path program 5 times [2024-06-27 21:29:18,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:18,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229457533] [2024-06-27 21:29:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:18,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:19,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:19,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229457533] [2024-06-27 21:29:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229457533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:19,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587847708] [2024-06-27 21:29:19,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:19,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:19,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:19,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:19,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 418 transitions, 5857 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:19,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:19,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:19,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:20,698 INFO L124 PetriNetUnfolderBase]: 3372/5444 cut-off events. [2024-06-27 21:29:20,698 INFO L125 PetriNetUnfolderBase]: For 585393/585393 co-relation queries the response was YES. [2024-06-27 21:29:20,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47965 conditions, 5444 events. 3372/5444 cut-off events. For 585393/585393 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 33907 event pairs, 689 based on Foata normal form. 4/5445 useless extension candidates. Maximal degree in co-relation 47810. Up to 5188 conditions per place. [2024-06-27 21:29:20,773 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 407 selfloop transitions, 27 changer transitions 0/439 dead transitions. [2024-06-27 21:29:20,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 439 transitions, 6900 flow [2024-06-27 21:29:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:29:20,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 21:29:20,774 INFO L175 Difference]: Start difference. First operand has 329 places, 418 transitions, 5857 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:29:20,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 439 transitions, 6900 flow [2024-06-27 21:29:22,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 439 transitions, 6670 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:22,511 INFO L231 Difference]: Finished difference. Result has 333 places, 422 transitions, 5790 flow [2024-06-27 21:29:22,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5647, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5790, PETRI_PLACES=333, PETRI_TRANSITIONS=422} [2024-06-27 21:29:22,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-27 21:29:22,512 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 422 transitions, 5790 flow [2024-06-27 21:29:22,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:22,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:22,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:22,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:29:22,512 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:22,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:22,512 INFO L85 PathProgramCache]: Analyzing trace with hash 585294228, now seen corresponding path program 8 times [2024-06-27 21:29:22,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:22,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506218058] [2024-06-27 21:29:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:22,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:23,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:23,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506218058] [2024-06-27 21:29:23,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506218058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:23,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:23,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506574686] [2024-06-27 21:29:23,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:23,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:23,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:23,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:23,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 422 transitions, 5790 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:23,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:23,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:23,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:24,409 INFO L124 PetriNetUnfolderBase]: 3408/5493 cut-off events. [2024-06-27 21:29:24,409 INFO L125 PetriNetUnfolderBase]: For 589118/589118 co-relation queries the response was YES. [2024-06-27 21:29:24,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48069 conditions, 5493 events. 3408/5493 cut-off events. For 589118/589118 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34246 event pairs, 683 based on Foata normal form. 2/5485 useless extension candidates. Maximal degree in co-relation 47912. Up to 5119 conditions per place. [2024-06-27 21:29:24,489 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 368 selfloop transitions, 79 changer transitions 0/452 dead transitions. [2024-06-27 21:29:24,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 452 transitions, 7198 flow [2024-06-27 21:29:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:29:24,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 21:29:24,490 INFO L175 Difference]: Start difference. First operand has 333 places, 422 transitions, 5790 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:29:24,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 452 transitions, 7198 flow [2024-06-27 21:29:26,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 452 transitions, 7098 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:26,299 INFO L231 Difference]: Finished difference. Result has 337 places, 434 transitions, 6123 flow [2024-06-27 21:29:26,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6123, PETRI_PLACES=337, PETRI_TRANSITIONS=434} [2024-06-27 21:29:26,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-27 21:29:26,300 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 434 transitions, 6123 flow [2024-06-27 21:29:26,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:26,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:26,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:26,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:29:26,300 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:26,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash 585027318, now seen corresponding path program 9 times [2024-06-27 21:29:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:26,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296110447] [2024-06-27 21:29:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:26,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:26,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:26,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296110447] [2024-06-27 21:29:26,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296110447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:26,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:26,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18696739] [2024-06-27 21:29:26,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:26,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:26,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:27,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:27,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 434 transitions, 6123 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:27,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:27,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:27,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:28,386 INFO L124 PetriNetUnfolderBase]: 3402/5493 cut-off events. [2024-06-27 21:29:28,386 INFO L125 PetriNetUnfolderBase]: For 594100/594100 co-relation queries the response was YES. [2024-06-27 21:29:28,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48040 conditions, 5493 events. 3402/5493 cut-off events. For 594100/594100 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34305 event pairs, 689 based on Foata normal form. 2/5485 useless extension candidates. Maximal degree in co-relation 47881. Up to 5114 conditions per place. [2024-06-27 21:29:28,458 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 370 selfloop transitions, 80 changer transitions 0/455 dead transitions. [2024-06-27 21:29:28,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 455 transitions, 7166 flow [2024-06-27 21:29:28,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:29:28,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:29:28,459 INFO L175 Difference]: Start difference. First operand has 337 places, 434 transitions, 6123 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:29:28,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 455 transitions, 7166 flow [2024-06-27 21:29:30,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 455 transitions, 6947 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:30,235 INFO L231 Difference]: Finished difference. Result has 343 places, 434 transitions, 6071 flow [2024-06-27 21:29:30,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5904, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6071, PETRI_PLACES=343, PETRI_TRANSITIONS=434} [2024-06-27 21:29:30,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-27 21:29:30,236 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 434 transitions, 6071 flow [2024-06-27 21:29:30,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:30,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:30,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:30,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:29:30,236 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:30,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:30,236 INFO L85 PathProgramCache]: Analyzing trace with hash 289830488, now seen corresponding path program 6 times [2024-06-27 21:29:30,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:30,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938294880] [2024-06-27 21:29:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:30,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:30,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:30,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938294880] [2024-06-27 21:29:30,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938294880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:30,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:30,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:30,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995296941] [2024-06-27 21:29:30,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:30,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:30,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:30,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:30,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 434 transitions, 6071 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:30,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:30,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:30,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:32,017 INFO L124 PetriNetUnfolderBase]: 3422/5531 cut-off events. [2024-06-27 21:29:32,017 INFO L125 PetriNetUnfolderBase]: For 613465/613465 co-relation queries the response was YES. [2024-06-27 21:29:32,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48314 conditions, 5531 events. 3422/5531 cut-off events. For 613465/613465 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34609 event pairs, 689 based on Foata normal form. 4/5525 useless extension candidates. Maximal degree in co-relation 48155. Up to 4999 conditions per place. [2024-06-27 21:29:32,097 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 369 selfloop transitions, 88 changer transitions 0/462 dead transitions. [2024-06-27 21:29:32,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 462 transitions, 7418 flow [2024-06-27 21:29:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:29:32,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 21:29:32,098 INFO L175 Difference]: Start difference. First operand has 343 places, 434 transitions, 6071 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:29:32,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 462 transitions, 7418 flow [2024-06-27 21:29:34,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 462 transitions, 7236 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:34,222 INFO L231 Difference]: Finished difference. Result has 343 places, 437 transitions, 6140 flow [2024-06-27 21:29:34,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5889, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6140, PETRI_PLACES=343, PETRI_TRANSITIONS=437} [2024-06-27 21:29:34,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-27 21:29:34,223 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 437 transitions, 6140 flow [2024-06-27 21:29:34,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:34,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:34,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:34,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:29:34,223 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:34,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash 289967734, now seen corresponding path program 10 times [2024-06-27 21:29:34,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:34,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991404947] [2024-06-27 21:29:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:34,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:34,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:34,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991404947] [2024-06-27 21:29:34,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991404947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:34,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:34,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:34,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987515304] [2024-06-27 21:29:34,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:34,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:34,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:34,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:34,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:34,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 437 transitions, 6140 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:34,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:34,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:34,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:36,050 INFO L124 PetriNetUnfolderBase]: 3416/5521 cut-off events. [2024-06-27 21:29:36,050 INFO L125 PetriNetUnfolderBase]: For 611096/611096 co-relation queries the response was YES. [2024-06-27 21:29:36,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48293 conditions, 5521 events. 3416/5521 cut-off events. For 611096/611096 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 34613 event pairs, 694 based on Foata normal form. 2/5513 useless extension candidates. Maximal degree in co-relation 48133. Up to 5076 conditions per place. [2024-06-27 21:29:36,130 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 373 selfloop transitions, 83 changer transitions 0/461 dead transitions. [2024-06-27 21:29:36,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 461 transitions, 7365 flow [2024-06-27 21:29:36,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:36,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 21:29:36,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-27 21:29:36,131 INFO L175 Difference]: Start difference. First operand has 343 places, 437 transitions, 6140 flow. Second operand 7 states and 138 transitions. [2024-06-27 21:29:36,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 461 transitions, 7365 flow [2024-06-27 21:29:37,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 461 transitions, 7137 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:37,875 INFO L231 Difference]: Finished difference. Result has 345 places, 437 transitions, 6090 flow [2024-06-27 21:29:37,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5912, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6090, PETRI_PLACES=345, PETRI_TRANSITIONS=437} [2024-06-27 21:29:37,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-27 21:29:37,876 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 437 transitions, 6090 flow [2024-06-27 21:29:37,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:37,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:37,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:37,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:29:37,876 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:37,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1082353582, now seen corresponding path program 7 times [2024-06-27 21:29:37,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:37,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039563113] [2024-06-27 21:29:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:37,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039563113] [2024-06-27 21:29:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039563113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:38,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:38,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:38,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52397689] [2024-06-27 21:29:38,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:38,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:38,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:38,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:38,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 437 transitions, 6090 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:38,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:38,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:38,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:39,725 INFO L124 PetriNetUnfolderBase]: 3446/5556 cut-off events. [2024-06-27 21:29:39,725 INFO L125 PetriNetUnfolderBase]: For 634855/634855 co-relation queries the response was YES. [2024-06-27 21:29:39,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48591 conditions, 5556 events. 3446/5556 cut-off events. For 634855/634855 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 34738 event pairs, 680 based on Foata normal form. 4/5557 useless extension candidates. Maximal degree in co-relation 48430. Up to 5272 conditions per place. [2024-06-27 21:29:39,804 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 421 selfloop transitions, 33 changer transitions 0/459 dead transitions. [2024-06-27 21:29:39,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 459 transitions, 7189 flow [2024-06-27 21:29:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:29:39,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-27 21:29:39,805 INFO L175 Difference]: Start difference. First operand has 345 places, 437 transitions, 6090 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:29:39,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 459 transitions, 7189 flow [2024-06-27 21:29:41,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 459 transitions, 6947 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:41,530 INFO L231 Difference]: Finished difference. Result has 344 places, 443 transitions, 6039 flow [2024-06-27 21:29:41,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5848, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6039, PETRI_PLACES=344, PETRI_TRANSITIONS=443} [2024-06-27 21:29:41,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-27 21:29:41,531 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 443 transitions, 6039 flow [2024-06-27 21:29:41,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:41,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:41,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:41,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:29:41,532 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:41,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:41,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1491742248, now seen corresponding path program 8 times [2024-06-27 21:29:41,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:41,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635404075] [2024-06-27 21:29:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:41,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:42,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:42,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635404075] [2024-06-27 21:29:42,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635404075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:42,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:42,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:42,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831180606] [2024-06-27 21:29:42,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:42,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:42,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:42,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:42,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:42,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:42,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 443 transitions, 6039 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:42,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:42,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:42,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:43,335 INFO L124 PetriNetUnfolderBase]: 3466/5597 cut-off events. [2024-06-27 21:29:43,336 INFO L125 PetriNetUnfolderBase]: For 635091/635091 co-relation queries the response was YES. [2024-06-27 21:29:43,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48691 conditions, 5597 events. 3466/5597 cut-off events. For 635091/635091 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35158 event pairs, 670 based on Foata normal form. 4/5593 useless extension candidates. Maximal degree in co-relation 48531. Up to 5029 conditions per place. [2024-06-27 21:29:43,409 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 365 selfloop transitions, 99 changer transitions 0/469 dead transitions. [2024-06-27 21:29:43,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 469 transitions, 7550 flow [2024-06-27 21:29:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 21:29:43,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 21:29:43,410 INFO L175 Difference]: Start difference. First operand has 344 places, 443 transitions, 6039 flow. Second operand 7 states and 140 transitions. [2024-06-27 21:29:43,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 469 transitions, 7550 flow [2024-06-27 21:29:45,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 469 transitions, 7444 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 21:29:45,085 INFO L231 Difference]: Finished difference. Result has 348 places, 446 transitions, 6229 flow [2024-06-27 21:29:45,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5943, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6229, PETRI_PLACES=348, PETRI_TRANSITIONS=446} [2024-06-27 21:29:45,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-27 21:29:45,085 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 446 transitions, 6229 flow [2024-06-27 21:29:45,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:45,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:45,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:45,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:29:45,086 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:45,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash -491124200, now seen corresponding path program 9 times [2024-06-27 21:29:45,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:45,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663586034] [2024-06-27 21:29:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:45,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:45,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:45,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663586034] [2024-06-27 21:29:45,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663586034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:45,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:45,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:45,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117438837] [2024-06-27 21:29:45,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:45,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:45,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:45,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:45,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:45,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:45,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 446 transitions, 6229 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:45,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:45,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:45,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:47,009 INFO L124 PetriNetUnfolderBase]: 3486/5632 cut-off events. [2024-06-27 21:29:47,010 INFO L125 PetriNetUnfolderBase]: For 636315/636315 co-relation queries the response was YES. [2024-06-27 21:29:47,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49152 conditions, 5632 events. 3486/5632 cut-off events. For 636315/636315 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 35405 event pairs, 690 based on Foata normal form. 4/5633 useless extension candidates. Maximal degree in co-relation 48991. Up to 5324 conditions per place. [2024-06-27 21:29:47,077 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 424 selfloop transitions, 38 changer transitions 0/467 dead transitions. [2024-06-27 21:29:47,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 467 transitions, 7328 flow [2024-06-27 21:29:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:29:47,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 21:29:47,078 INFO L175 Difference]: Start difference. First operand has 348 places, 446 transitions, 6229 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:29:47,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 467 transitions, 7328 flow [2024-06-27 21:29:49,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 467 transitions, 7090 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 21:29:49,007 INFO L231 Difference]: Finished difference. Result has 348 places, 451 transitions, 6182 flow [2024-06-27 21:29:49,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6001, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6182, PETRI_PLACES=348, PETRI_TRANSITIONS=451} [2024-06-27 21:29:49,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-27 21:29:49,007 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 451 transitions, 6182 flow [2024-06-27 21:29:49,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:49,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:49,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:49,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:29:49,008 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:49,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1491742434, now seen corresponding path program 11 times [2024-06-27 21:29:49,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:49,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700194669] [2024-06-27 21:29:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:49,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:49,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:49,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700194669] [2024-06-27 21:29:49,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700194669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:49,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:49,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:49,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7293379] [2024-06-27 21:29:49,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:49,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:49,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:49,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:49,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:49,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 451 transitions, 6182 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:49,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:49,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:49,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:50,902 INFO L124 PetriNetUnfolderBase]: 3480/5627 cut-off events. [2024-06-27 21:29:50,902 INFO L125 PetriNetUnfolderBase]: For 608588/608588 co-relation queries the response was YES. [2024-06-27 21:29:50,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48368 conditions, 5627 events. 3480/5627 cut-off events. For 608588/608588 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 35405 event pairs, 685 based on Foata normal form. 2/5621 useless extension candidates. Maximal degree in co-relation 48209. Up to 5169 conditions per place. [2024-06-27 21:29:50,987 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 394 selfloop transitions, 77 changer transitions 0/476 dead transitions. [2024-06-27 21:29:50,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 476 transitions, 7463 flow [2024-06-27 21:29:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 21:29:50,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-27 21:29:50,988 INFO L175 Difference]: Start difference. First operand has 348 places, 451 transitions, 6182 flow. Second operand 7 states and 139 transitions. [2024-06-27 21:29:50,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 476 transitions, 7463 flow [2024-06-27 21:29:52,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 476 transitions, 7311 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:52,945 INFO L231 Difference]: Finished difference. Result has 351 places, 451 transitions, 6200 flow [2024-06-27 21:29:52,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6032, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6200, PETRI_PLACES=351, PETRI_TRANSITIONS=451} [2024-06-27 21:29:52,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-27 21:29:52,945 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 451 transitions, 6200 flow [2024-06-27 21:29:52,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:52,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:52,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:52,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:29:52,946 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:52,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:52,946 INFO L85 PathProgramCache]: Analyzing trace with hash -491361536, now seen corresponding path program 12 times [2024-06-27 21:29:52,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:52,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357658149] [2024-06-27 21:29:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:52,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:53,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:53,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357658149] [2024-06-27 21:29:53,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357658149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:53,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:53,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:53,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27250792] [2024-06-27 21:29:53,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:53,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:53,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:53,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:53,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:53,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:53,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 451 transitions, 6200 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:53,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:53,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:53,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:54,814 INFO L124 PetriNetUnfolderBase]: 3474/5626 cut-off events. [2024-06-27 21:29:54,814 INFO L125 PetriNetUnfolderBase]: For 599927/599927 co-relation queries the response was YES. [2024-06-27 21:29:54,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48038 conditions, 5626 events. 3474/5626 cut-off events. For 599927/599927 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35491 event pairs, 686 based on Foata normal form. 2/5625 useless extension candidates. Maximal degree in co-relation 47879. Up to 5267 conditions per place. [2024-06-27 21:29:54,896 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 50 changer transitions 0/473 dead transitions. [2024-06-27 21:29:54,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 473 transitions, 7237 flow [2024-06-27 21:29:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:29:54,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 21:29:54,896 INFO L175 Difference]: Start difference. First operand has 351 places, 451 transitions, 6200 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:29:54,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 473 transitions, 7237 flow [2024-06-27 21:29:56,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 473 transitions, 7052 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:56,486 INFO L231 Difference]: Finished difference. Result has 353 places, 451 transitions, 6137 flow [2024-06-27 21:29:56,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6137, PETRI_PLACES=353, PETRI_TRANSITIONS=451} [2024-06-27 21:29:56,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-27 21:29:56,487 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 451 transitions, 6137 flow [2024-06-27 21:29:56,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:56,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:56,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:56,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:29:56,487 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:56,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:56,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1698395688, now seen corresponding path program 10 times [2024-06-27 21:29:56,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:56,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669017205] [2024-06-27 21:29:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:56,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:57,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:57,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669017205] [2024-06-27 21:29:57,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669017205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:57,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:57,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:57,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466966972] [2024-06-27 21:29:57,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:57,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:57,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:57,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:57,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:57,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:29:57,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 451 transitions, 6137 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:57,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:57,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:29:57,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:58,273 INFO L124 PetriNetUnfolderBase]: 3494/5646 cut-off events. [2024-06-27 21:29:58,273 INFO L125 PetriNetUnfolderBase]: For 608101/608101 co-relation queries the response was YES. [2024-06-27 21:29:58,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48190 conditions, 5646 events. 3494/5646 cut-off events. For 608101/608101 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 35450 event pairs, 693 based on Foata normal form. 4/5647 useless extension candidates. Maximal degree in co-relation 48031. Up to 5220 conditions per place. [2024-06-27 21:29:58,354 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 66 changer transitions 0/476 dead transitions. [2024-06-27 21:29:58,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 476 transitions, 7456 flow [2024-06-27 21:29:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 21:29:58,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-27 21:29:58,355 INFO L175 Difference]: Start difference. First operand has 353 places, 451 transitions, 6137 flow. Second operand 7 states and 138 transitions. [2024-06-27 21:29:58,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 476 transitions, 7456 flow [2024-06-27 21:29:59,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 476 transitions, 7347 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:59,964 INFO L231 Difference]: Finished difference. Result has 354 places, 454 transitions, 6258 flow [2024-06-27 21:29:59,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6258, PETRI_PLACES=354, PETRI_TRANSITIONS=454} [2024-06-27 21:29:59,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-27 21:29:59,965 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 454 transitions, 6258 flow [2024-06-27 21:29:59,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:59,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:59,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:59,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:29:59,965 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:59,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash -478611980, now seen corresponding path program 11 times [2024-06-27 21:29:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:59,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450471240] [2024-06-27 21:29:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:59,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:00,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:00,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450471240] [2024-06-27 21:30:00,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450471240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:00,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:00,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:00,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491181422] [2024-06-27 21:30:00,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:00,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:00,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:00,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:00,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:00,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:30:00,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 454 transitions, 6258 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:00,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:00,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:30:00,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:01,821 INFO L124 PetriNetUnfolderBase]: 3482/5634 cut-off events. [2024-06-27 21:30:01,821 INFO L125 PetriNetUnfolderBase]: For 592838/592838 co-relation queries the response was YES. [2024-06-27 21:30:01,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47804 conditions, 5634 events. 3482/5634 cut-off events. For 592838/592838 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 35441 event pairs, 689 based on Foata normal form. 4/5635 useless extension candidates. Maximal degree in co-relation 47644. Up to 5294 conditions per place. [2024-06-27 21:30:01,897 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 420 selfloop transitions, 47 changer transitions 0/472 dead transitions. [2024-06-27 21:30:01,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 472 transitions, 7278 flow [2024-06-27 21:30:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:30:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:30:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 21:30:01,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-27 21:30:01,898 INFO L175 Difference]: Start difference. First operand has 354 places, 454 transitions, 6258 flow. Second operand 6 states and 121 transitions. [2024-06-27 21:30:01,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 472 transitions, 7278 flow [2024-06-27 21:30:03,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 472 transitions, 7090 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:03,426 INFO L231 Difference]: Finished difference. Result has 354 places, 454 transitions, 6193 flow [2024-06-27 21:30:03,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6193, PETRI_PLACES=354, PETRI_TRANSITIONS=454} [2024-06-27 21:30:03,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-27 21:30:03,427 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 454 transitions, 6193 flow [2024-06-27 21:30:03,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:03,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:03,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:03,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:30:03,427 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:03,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:03,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1485040668, now seen corresponding path program 12 times [2024-06-27 21:30:03,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:03,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273861465] [2024-06-27 21:30:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:03,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:03,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273861465] [2024-06-27 21:30:03,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273861465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:03,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:03,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:03,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238607176] [2024-06-27 21:30:03,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:03,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:03,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:03,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:03,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:04,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:30:04,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 454 transitions, 6193 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:04,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:04,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:30:04,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:05,275 INFO L124 PetriNetUnfolderBase]: 3470/5620 cut-off events. [2024-06-27 21:30:05,275 INFO L125 PetriNetUnfolderBase]: For 564976/564976 co-relation queries the response was YES. [2024-06-27 21:30:05,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46915 conditions, 5620 events. 3470/5620 cut-off events. For 564976/564976 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 35384 event pairs, 679 based on Foata normal form. 4/5621 useless extension candidates. Maximal degree in co-relation 46756. Up to 5203 conditions per place. [2024-06-27 21:30:05,361 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 394 selfloop transitions, 79 changer transitions 0/478 dead transitions. [2024-06-27 21:30:05,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 478 transitions, 7271 flow [2024-06-27 21:30:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 21:30:05,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-27 21:30:05,362 INFO L175 Difference]: Start difference. First operand has 354 places, 454 transitions, 6193 flow. Second operand 7 states and 143 transitions. [2024-06-27 21:30:05,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 478 transitions, 7271 flow [2024-06-27 21:30:07,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 478 transitions, 7125 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:07,193 INFO L231 Difference]: Finished difference. Result has 356 places, 454 transitions, 6232 flow [2024-06-27 21:30:07,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6047, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6232, PETRI_PLACES=356, PETRI_TRANSITIONS=454} [2024-06-27 21:30:07,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-27 21:30:07,193 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 454 transitions, 6232 flow [2024-06-27 21:30:07,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:07,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:07,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:07,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:30:07,194 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:07,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:07,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1698149610, now seen corresponding path program 2 times [2024-06-27 21:30:07,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:07,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879418954] [2024-06-27 21:30:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:07,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:08,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:08,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879418954] [2024-06-27 21:30:08,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879418954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:08,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:08,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:08,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030922387] [2024-06-27 21:30:08,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:08,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:08,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:08,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:08,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:08,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:30:08,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 454 transitions, 6232 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:08,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:08,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:30:08,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:09,521 INFO L124 PetriNetUnfolderBase]: 3514/5678 cut-off events. [2024-06-27 21:30:09,522 INFO L125 PetriNetUnfolderBase]: For 606294/606294 co-relation queries the response was YES. [2024-06-27 21:30:09,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47496 conditions, 5678 events. 3514/5678 cut-off events. For 606294/606294 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 35673 event pairs, 661 based on Foata normal form. 12/5687 useless extension candidates. Maximal degree in co-relation 47336. Up to 5196 conditions per place. [2024-06-27 21:30:09,601 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 422 selfloop transitions, 52 changer transitions 0/479 dead transitions. [2024-06-27 21:30:09,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 479 transitions, 7392 flow [2024-06-27 21:30:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 21:30:09,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-27 21:30:09,603 INFO L175 Difference]: Start difference. First operand has 356 places, 454 transitions, 6232 flow. Second operand 7 states and 137 transitions. [2024-06-27 21:30:09,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 479 transitions, 7392 flow [2024-06-27 21:30:11,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 479 transitions, 7220 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:11,597 INFO L231 Difference]: Finished difference. Result has 357 places, 455 transitions, 6188 flow [2024-06-27 21:30:11,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6060, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6188, PETRI_PLACES=357, PETRI_TRANSITIONS=455} [2024-06-27 21:30:11,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-27 21:30:11,597 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 455 transitions, 6188 flow [2024-06-27 21:30:11,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:11,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:11,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:11,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:30:11,598 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:11,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1254815820, now seen corresponding path program 3 times [2024-06-27 21:30:11,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:11,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531516722] [2024-06-27 21:30:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:11,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:12,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:12,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531516722] [2024-06-27 21:30:12,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531516722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:12,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:12,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:12,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875322980] [2024-06-27 21:30:12,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:12,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:12,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:12,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:12,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:12,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:30:12,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 455 transitions, 6188 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 21:30:12,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:12,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:30:12,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:13,738 INFO L124 PetriNetUnfolderBase]: 3588/5808 cut-off events. [2024-06-27 21:30:13,739 INFO L125 PetriNetUnfolderBase]: For 633498/633498 co-relation queries the response was YES. [2024-06-27 21:30:13,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49073 conditions, 5808 events. 3588/5808 cut-off events. For 633498/633498 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36700 event pairs, 640 based on Foata normal form. 8/5813 useless extension candidates. Maximal degree in co-relation 48912. Up to 5265 conditions per place. [2024-06-27 21:30:13,826 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 433 selfloop transitions, 49 changer transitions 0/487 dead transitions. [2024-06-27 21:30:13,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 487 transitions, 7612 flow [2024-06-27 21:30:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 21:30:13,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-27 21:30:13,827 INFO L175 Difference]: Start difference. First operand has 357 places, 455 transitions, 6188 flow. Second operand 7 states and 144 transitions. [2024-06-27 21:30:13,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 487 transitions, 7612 flow [2024-06-27 21:30:15,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 487 transitions, 7500 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:15,570 INFO L231 Difference]: Finished difference. Result has 359 places, 457 transitions, 6214 flow [2024-06-27 21:30:15,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6082, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6214, PETRI_PLACES=359, PETRI_TRANSITIONS=457} [2024-06-27 21:30:15,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-27 21:30:15,570 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 457 transitions, 6214 flow [2024-06-27 21:30:15,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 21:30:15,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:15,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:30:15,571 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:15,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:15,571 INFO L85 PathProgramCache]: Analyzing trace with hash -478170602, now seen corresponding path program 4 times [2024-06-27 21:30:15,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:15,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60040380] [2024-06-27 21:30:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:15,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:16,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60040380] [2024-06-27 21:30:16,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60040380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:16,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:16,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:16,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134338587] [2024-06-27 21:30:16,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:16,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:16,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:30:16,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 457 transitions, 6214 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 21:30:16,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:16,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:30:16,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:17,709 INFO L124 PetriNetUnfolderBase]: 3560/5762 cut-off events. [2024-06-27 21:30:17,709 INFO L125 PetriNetUnfolderBase]: For 603901/603901 co-relation queries the response was YES. [2024-06-27 21:30:17,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47688 conditions, 5762 events. 3560/5762 cut-off events. For 603901/603901 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36294 event pairs, 638 based on Foata normal form. 12/5771 useless extension candidates. Maximal degree in co-relation 47526. Up to 5291 conditions per place. [2024-06-27 21:30:17,792 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 430 selfloop transitions, 46 changer transitions 0/481 dead transitions. [2024-06-27 21:30:17,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 481 transitions, 7342 flow [2024-06-27 21:30:17,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:30:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:30:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 21:30:17,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 21:30:17,793 INFO L175 Difference]: Start difference. First operand has 359 places, 457 transitions, 6214 flow. Second operand 6 states and 126 transitions. [2024-06-27 21:30:17,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 481 transitions, 7342 flow [2024-06-27 21:30:19,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 481 transitions, 7284 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:30:19,538 INFO L231 Difference]: Finished difference. Result has 362 places, 457 transitions, 6265 flow [2024-06-27 21:30:19,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6156, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6265, PETRI_PLACES=362, PETRI_TRANSITIONS=457} [2024-06-27 21:30:19,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 21:30:19,538 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 457 transitions, 6265 flow [2024-06-27 21:30:19,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 21:30:19,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:19,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:19,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:30:19,539 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:19,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash 544644412, now seen corresponding path program 1 times [2024-06-27 21:30:19,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:19,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161081018] [2024-06-27 21:30:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:19,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:20,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:20,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161081018] [2024-06-27 21:30:20,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161081018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:20,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:20,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:20,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085589568] [2024-06-27 21:30:20,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:20,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:20,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:20,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:20,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:30:20,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 457 transitions, 6265 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:20,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:20,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:30:20,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:21,719 INFO L124 PetriNetUnfolderBase]: 3530/5781 cut-off events. [2024-06-27 21:30:21,719 INFO L125 PetriNetUnfolderBase]: For 649563/649587 co-relation queries the response was YES. [2024-06-27 21:30:21,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48999 conditions, 5781 events. 3530/5781 cut-off events. For 649563/649587 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 37201 event pairs, 671 based on Foata normal form. 10/5783 useless extension candidates. Maximal degree in co-relation 48835. Up to 5106 conditions per place. [2024-06-27 21:30:21,801 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 390 selfloop transitions, 60 changer transitions 0/496 dead transitions. [2024-06-27 21:30:21,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 496 transitions, 7583 flow [2024-06-27 21:30:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 21:30:21,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-27 21:30:21,802 INFO L175 Difference]: Start difference. First operand has 362 places, 457 transitions, 6265 flow. Second operand 9 states and 181 transitions. [2024-06-27 21:30:21,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 496 transitions, 7583 flow [2024-06-27 21:30:23,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 496 transitions, 7486 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:23,494 INFO L231 Difference]: Finished difference. Result has 366 places, 459 transitions, 6330 flow [2024-06-27 21:30:23,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6168, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6330, PETRI_PLACES=366, PETRI_TRANSITIONS=459} [2024-06-27 21:30:23,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-27 21:30:23,495 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 459 transitions, 6330 flow [2024-06-27 21:30:23,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:23,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:23,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:23,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:30:23,495 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:23,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash 467216468, now seen corresponding path program 2 times [2024-06-27 21:30:23,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:23,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321194243] [2024-06-27 21:30:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:24,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321194243] [2024-06-27 21:30:24,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321194243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:24,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:24,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:24,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542642448] [2024-06-27 21:30:24,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:24,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:24,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:24,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:30:24,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 459 transitions, 6330 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:24,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:24,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:30:24,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:25,826 INFO L124 PetriNetUnfolderBase]: 3603/5884 cut-off events. [2024-06-27 21:30:25,826 INFO L125 PetriNetUnfolderBase]: For 697669/697717 co-relation queries the response was YES. [2024-06-27 21:30:25,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50084 conditions, 5884 events. 3603/5884 cut-off events. For 697669/697717 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37893 event pairs, 707 based on Foata normal form. 14/5890 useless extension candidates. Maximal degree in co-relation 49919. Up to 5294 conditions per place. [2024-06-27 21:30:25,913 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 59 changer transitions 0/492 dead transitions. [2024-06-27 21:30:25,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 492 transitions, 7420 flow [2024-06-27 21:30:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 21:30:25,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 21:30:25,914 INFO L175 Difference]: Start difference. First operand has 366 places, 459 transitions, 6330 flow. Second operand 10 states and 191 transitions. [2024-06-27 21:30:25,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 492 transitions, 7420 flow [2024-06-27 21:30:27,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 492 transitions, 7339 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:27,690 INFO L231 Difference]: Finished difference. Result has 371 places, 460 transitions, 6397 flow [2024-06-27 21:30:27,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6249, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6397, PETRI_PLACES=371, PETRI_TRANSITIONS=460} [2024-06-27 21:30:27,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-27 21:30:27,691 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 460 transitions, 6397 flow [2024-06-27 21:30:27,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:27,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:27,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:27,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:30:27,691 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:27,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:27,691 INFO L85 PathProgramCache]: Analyzing trace with hash 585304148, now seen corresponding path program 3 times [2024-06-27 21:30:27,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:27,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446985611] [2024-06-27 21:30:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:28,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:28,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446985611] [2024-06-27 21:30:28,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446985611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:28,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:28,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:28,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495430039] [2024-06-27 21:30:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:28,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:28,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:28,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:28,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:30:28,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 460 transitions, 6397 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:28,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:28,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:30:28,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:30,000 INFO L124 PetriNetUnfolderBase]: 3623/5920 cut-off events. [2024-06-27 21:30:30,000 INFO L125 PetriNetUnfolderBase]: For 683796/683820 co-relation queries the response was YES. [2024-06-27 21:30:30,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50486 conditions, 5920 events. 3623/5920 cut-off events. For 683796/683820 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 38190 event pairs, 715 based on Foata normal form. 10/5924 useless extension candidates. Maximal degree in co-relation 50319. Up to 5417 conditions per place. [2024-06-27 21:30:30,085 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 40 changer transitions 0/484 dead transitions. [2024-06-27 21:30:30,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 484 transitions, 7407 flow [2024-06-27 21:30:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:30,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:30,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:30:30,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-27 21:30:30,086 INFO L175 Difference]: Start difference. First operand has 371 places, 460 transitions, 6397 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:30:30,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 484 transitions, 7407 flow [2024-06-27 21:30:32,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 484 transitions, 7291 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:30:32,510 INFO L231 Difference]: Finished difference. Result has 372 places, 461 transitions, 6390 flow [2024-06-27 21:30:32,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6281, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6390, PETRI_PLACES=372, PETRI_TRANSITIONS=461} [2024-06-27 21:30:32,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-27 21:30:32,511 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 461 transitions, 6390 flow [2024-06-27 21:30:32,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:32,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:32,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:32,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:30:32,511 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:32,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:32,511 INFO L85 PathProgramCache]: Analyzing trace with hash 585488846, now seen corresponding path program 1 times [2024-06-27 21:30:32,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:32,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320628956] [2024-06-27 21:30:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:32,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:33,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:33,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320628956] [2024-06-27 21:30:33,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320628956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:33,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:33,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:33,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097451356] [2024-06-27 21:30:33,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:33,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:33,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:33,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:30:33,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 461 transitions, 6390 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:33,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:33,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:30:33,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:34,786 INFO L124 PetriNetUnfolderBase]: 3759/6071 cut-off events. [2024-06-27 21:30:34,786 INFO L125 PetriNetUnfolderBase]: For 653967/653967 co-relation queries the response was YES. [2024-06-27 21:30:34,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51573 conditions, 6071 events. 3759/6071 cut-off events. For 653967/653967 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 38592 event pairs, 755 based on Foata normal form. 2/6070 useless extension candidates. Maximal degree in co-relation 51405. Up to 5781 conditions per place. [2024-06-27 21:30:34,867 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 445 selfloop transitions, 29 changer transitions 0/479 dead transitions. [2024-06-27 21:30:34,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 479 transitions, 7434 flow [2024-06-27 21:30:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:30:34,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 21:30:34,868 INFO L175 Difference]: Start difference. First operand has 372 places, 461 transitions, 6390 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:30:34,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 479 transitions, 7434 flow [2024-06-27 21:30:36,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 479 transitions, 7345 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:30:36,985 INFO L231 Difference]: Finished difference. Result has 373 places, 463 transitions, 6410 flow [2024-06-27 21:30:36,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6301, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6410, PETRI_PLACES=373, PETRI_TRANSITIONS=463} [2024-06-27 21:30:36,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-27 21:30:36,985 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 463 transitions, 6410 flow [2024-06-27 21:30:36,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:36,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:36,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:36,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:30:36,985 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:36,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:36,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1491465604, now seen corresponding path program 4 times [2024-06-27 21:30:36,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:36,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9586934] [2024-06-27 21:30:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:36,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:37,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:37,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9586934] [2024-06-27 21:30:37,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9586934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:37,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:37,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:37,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557824409] [2024-06-27 21:30:37,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:37,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:37,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:37,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:37,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:37,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 21:30:37,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 463 transitions, 6410 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:37,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:37,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 21:30:37,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:39,302 INFO L124 PetriNetUnfolderBase]: 3660/5985 cut-off events. [2024-06-27 21:30:39,302 INFO L125 PetriNetUnfolderBase]: For 710627/710653 co-relation queries the response was YES. [2024-06-27 21:30:39,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50327 conditions, 5985 events. 3660/5985 cut-off events. For 710627/710653 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38746 event pairs, 705 based on Foata normal form. 20/5997 useless extension candidates. Maximal degree in co-relation 50158. Up to 5398 conditions per place. [2024-06-27 21:30:39,378 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 400 selfloop transitions, 50 changer transitions 0/496 dead transitions. [2024-06-27 21:30:39,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 496 transitions, 7686 flow [2024-06-27 21:30:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 21:30:39,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-06-27 21:30:39,379 INFO L175 Difference]: Start difference. First operand has 373 places, 463 transitions, 6410 flow. Second operand 8 states and 165 transitions. [2024-06-27 21:30:39,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 496 transitions, 7686 flow [2024-06-27 21:30:41,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 496 transitions, 7567 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:41,485 INFO L231 Difference]: Finished difference. Result has 376 places, 465 transitions, 6467 flow [2024-06-27 21:30:41,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6291, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6467, PETRI_PLACES=376, PETRI_TRANSITIONS=465} [2024-06-27 21:30:41,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-27 21:30:41,485 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 465 transitions, 6467 flow [2024-06-27 21:30:41,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:41,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:41,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:41,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:30:41,486 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:41,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1491280906, now seen corresponding path program 2 times [2024-06-27 21:30:41,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:41,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193269559] [2024-06-27 21:30:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:41,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:42,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:42,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193269559] [2024-06-27 21:30:42,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193269559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:42,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:42,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:42,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603207798] [2024-06-27 21:30:42,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:42,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:42,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:42,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:42,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:30:42,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 465 transitions, 6467 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:42,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:42,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:30:42,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:43,741 INFO L124 PetriNetUnfolderBase]: 3796/6126 cut-off events. [2024-06-27 21:30:43,741 INFO L125 PetriNetUnfolderBase]: For 654055/654055 co-relation queries the response was YES. [2024-06-27 21:30:43,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51731 conditions, 6126 events. 3796/6126 cut-off events. For 654055/654055 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 38978 event pairs, 741 based on Foata normal form. 2/6125 useless extension candidates. Maximal degree in co-relation 51560. Up to 5840 conditions per place. [2024-06-27 21:30:43,819 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 446 selfloop transitions, 31 changer transitions 0/482 dead transitions. [2024-06-27 21:30:43,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 482 transitions, 7521 flow [2024-06-27 21:30:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:30:43,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 21:30:43,820 INFO L175 Difference]: Start difference. First operand has 376 places, 465 transitions, 6467 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:30:43,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 482 transitions, 7521 flow [2024-06-27 21:30:45,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 482 transitions, 7385 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:45,715 INFO L231 Difference]: Finished difference. Result has 377 places, 467 transitions, 6453 flow [2024-06-27 21:30:45,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6453, PETRI_PLACES=377, PETRI_TRANSITIONS=467} [2024-06-27 21:30:45,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-27 21:30:45,716 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 467 transitions, 6453 flow [2024-06-27 21:30:45,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:45,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:45,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:45,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:30:45,716 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:45,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:45,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1255105546, now seen corresponding path program 3 times [2024-06-27 21:30:45,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:45,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332273845] [2024-06-27 21:30:45,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:45,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:46,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:46,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332273845] [2024-06-27 21:30:46,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332273845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:46,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:46,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:46,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684929181] [2024-06-27 21:30:46,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:46,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:46,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:46,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:30:46,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 467 transitions, 6453 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:46,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:46,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:30:46,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:47,948 INFO L124 PetriNetUnfolderBase]: 3804/6136 cut-off events. [2024-06-27 21:30:47,948 INFO L125 PetriNetUnfolderBase]: For 653688/653688 co-relation queries the response was YES. [2024-06-27 21:30:48,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51652 conditions, 6136 events. 3804/6136 cut-off events. For 653688/653688 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39010 event pairs, 744 based on Foata normal form. 2/6135 useless extension candidates. Maximal degree in co-relation 51480. Up to 5838 conditions per place. [2024-06-27 21:30:48,024 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 441 selfloop transitions, 36 changer transitions 0/482 dead transitions. [2024-06-27 21:30:48,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 482 transitions, 7503 flow [2024-06-27 21:30:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:30:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:30:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 21:30:48,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-27 21:30:48,025 INFO L175 Difference]: Start difference. First operand has 377 places, 467 transitions, 6453 flow. Second operand 6 states and 113 transitions. [2024-06-27 21:30:48,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 482 transitions, 7503 flow [2024-06-27 21:30:50,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 482 transitions, 7397 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:50,138 INFO L231 Difference]: Finished difference. Result has 378 places, 469 transitions, 6487 flow [2024-06-27 21:30:50,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6351, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6487, PETRI_PLACES=378, PETRI_TRANSITIONS=469} [2024-06-27 21:30:50,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-27 21:30:50,138 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 469 transitions, 6487 flow [2024-06-27 21:30:50,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:50,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:50,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:50,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:30:50,138 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:50,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:50,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1254808876, now seen corresponding path program 4 times [2024-06-27 21:30:50,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:50,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219539603] [2024-06-27 21:30:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:50,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:50,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:50,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219539603] [2024-06-27 21:30:50,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219539603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:50,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:50,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:50,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603529289] [2024-06-27 21:30:50,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:50,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:50,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:50,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:50,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:50,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:30:50,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 469 transitions, 6487 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:50,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:50,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:30:50,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:52,379 INFO L124 PetriNetUnfolderBase]: 3799/6141 cut-off events. [2024-06-27 21:30:52,379 INFO L125 PetriNetUnfolderBase]: For 644099/644099 co-relation queries the response was YES. [2024-06-27 21:30:52,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51365 conditions, 6141 events. 3799/6141 cut-off events. For 644099/644099 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 39106 event pairs, 763 based on Foata normal form. 2/6140 useless extension candidates. Maximal degree in co-relation 51192. Up to 5873 conditions per place. [2024-06-27 21:30:52,460 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 460 selfloop transitions, 16 changer transitions 0/481 dead transitions. [2024-06-27 21:30:52,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 481 transitions, 7519 flow [2024-06-27 21:30:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:30:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:30:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:30:52,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-27 21:30:52,461 INFO L175 Difference]: Start difference. First operand has 378 places, 469 transitions, 6487 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:30:52,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 481 transitions, 7519 flow [2024-06-27 21:30:54,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 481 transitions, 7407 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 21:30:54,556 INFO L231 Difference]: Finished difference. Result has 380 places, 471 transitions, 6468 flow [2024-06-27 21:30:54,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6468, PETRI_PLACES=380, PETRI_TRANSITIONS=471} [2024-06-27 21:30:54,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-27 21:30:54,556 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 471 transitions, 6468 flow [2024-06-27 21:30:54,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:54,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:54,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:54,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:30:54,556 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:54,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash -230892876, now seen corresponding path program 1 times [2024-06-27 21:30:54,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:54,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723452128] [2024-06-27 21:30:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:55,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:55,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723452128] [2024-06-27 21:30:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723452128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:55,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039650811] [2024-06-27 21:30:55,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:55,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:55,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:55,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:30:55,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 471 transitions, 6468 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:55,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:55,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:30:55,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:56,925 INFO L124 PetriNetUnfolderBase]: 3784/6104 cut-off events. [2024-06-27 21:30:56,925 INFO L125 PetriNetUnfolderBase]: For 634006/634006 co-relation queries the response was YES. [2024-06-27 21:30:56,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50937 conditions, 6104 events. 3784/6104 cut-off events. For 634006/634006 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38786 event pairs, 763 based on Foata normal form. 1/6102 useless extension candidates. Maximal degree in co-relation 50763. Up to 5806 conditions per place. [2024-06-27 21:30:57,002 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 445 selfloop transitions, 37 changer transitions 0/487 dead transitions. [2024-06-27 21:30:57,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 487 transitions, 7492 flow [2024-06-27 21:30:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:30:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:30:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 21:30:57,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483739837398374 [2024-06-27 21:30:57,003 INFO L175 Difference]: Start difference. First operand has 380 places, 471 transitions, 6468 flow. Second operand 6 states and 119 transitions. [2024-06-27 21:30:57,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 487 transitions, 7492 flow [2024-06-27 21:30:59,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 487 transitions, 7391 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:30:59,273 INFO L231 Difference]: Finished difference. Result has 382 places, 471 transitions, 6459 flow [2024-06-27 21:30:59,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6367, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6459, PETRI_PLACES=382, PETRI_TRANSITIONS=471} [2024-06-27 21:30:59,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-27 21:30:59,274 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 471 transitions, 6459 flow [2024-06-27 21:30:59,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:59,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:59,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:59,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:30:59,274 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:59,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1843206264, now seen corresponding path program 1 times [2024-06-27 21:30:59,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:59,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448641307] [2024-06-27 21:30:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:59,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:59,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:59,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448641307] [2024-06-27 21:30:59,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448641307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:59,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:59,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:59,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485576045] [2024-06-27 21:30:59,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:59,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:59,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:59,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:00,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:00,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 471 transitions, 6459 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:00,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:00,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:00,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:01,470 INFO L124 PetriNetUnfolderBase]: 3797/6130 cut-off events. [2024-06-27 21:31:01,470 INFO L125 PetriNetUnfolderBase]: For 649964/649964 co-relation queries the response was YES. [2024-06-27 21:31:01,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51335 conditions, 6130 events. 3797/6130 cut-off events. For 649964/649964 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39009 event pairs, 750 based on Foata normal form. 1/6128 useless extension candidates. Maximal degree in co-relation 51160. Up to 5785 conditions per place. [2024-06-27 21:31:01,569 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 457 selfloop transitions, 50 changer transitions 0/512 dead transitions. [2024-06-27 21:31:01,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 512 transitions, 8019 flow [2024-06-27 21:31:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:31:01,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-27 21:31:01,570 INFO L175 Difference]: Start difference. First operand has 382 places, 471 transitions, 6459 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:31:01,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 512 transitions, 8019 flow [2024-06-27 21:31:03,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 512 transitions, 7921 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:03,892 INFO L231 Difference]: Finished difference. Result has 386 places, 486 transitions, 6774 flow [2024-06-27 21:31:03,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6365, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6774, PETRI_PLACES=386, PETRI_TRANSITIONS=486} [2024-06-27 21:31:03,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-27 21:31:03,892 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 486 transitions, 6774 flow [2024-06-27 21:31:03,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:03,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:03,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:03,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:31:03,892 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:03,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:03,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1025248412, now seen corresponding path program 2 times [2024-06-27 21:31:03,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:03,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498915760] [2024-06-27 21:31:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:03,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:04,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:04,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498915760] [2024-06-27 21:31:04,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498915760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:04,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:04,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:04,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779468984] [2024-06-27 21:31:04,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:04,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:04,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:04,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:04,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:04,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:04,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 486 transitions, 6774 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:04,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:04,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:04,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:06,085 INFO L124 PetriNetUnfolderBase]: 3802/6139 cut-off events. [2024-06-27 21:31:06,085 INFO L125 PetriNetUnfolderBase]: For 643679/643679 co-relation queries the response was YES. [2024-06-27 21:31:06,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51823 conditions, 6139 events. 3802/6139 cut-off events. For 643679/643679 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39056 event pairs, 750 based on Foata normal form. 1/6137 useless extension candidates. Maximal degree in co-relation 51647. Up to 5811 conditions per place. [2024-06-27 21:31:06,178 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 461 selfloop transitions, 46 changer transitions 0/512 dead transitions. [2024-06-27 21:31:06,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 512 transitions, 7965 flow [2024-06-27 21:31:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:31:06,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:31:06,179 INFO L175 Difference]: Start difference. First operand has 386 places, 486 transitions, 6774 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:31:06,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 512 transitions, 7965 flow [2024-06-27 21:31:08,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 512 transitions, 7764 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-27 21:31:08,418 INFO L231 Difference]: Finished difference. Result has 390 places, 490 transitions, 6782 flow [2024-06-27 21:31:08,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6613, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6782, PETRI_PLACES=390, PETRI_TRANSITIONS=490} [2024-06-27 21:31:08,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-27 21:31:08,418 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 490 transitions, 6782 flow [2024-06-27 21:31:08,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:08,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:08,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:08,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:31:08,419 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:08,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:08,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1677495249, now seen corresponding path program 1 times [2024-06-27 21:31:08,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:08,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889813574] [2024-06-27 21:31:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:08,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:09,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889813574] [2024-06-27 21:31:09,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889813574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:09,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:09,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:09,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811050121] [2024-06-27 21:31:09,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:09,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:09,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:09,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:09,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:09,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:09,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 490 transitions, 6782 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:09,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:09,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:09,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:10,567 INFO L124 PetriNetUnfolderBase]: 3854/6205 cut-off events. [2024-06-27 21:31:10,567 INFO L125 PetriNetUnfolderBase]: For 686636/686636 co-relation queries the response was YES. [2024-06-27 21:31:10,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52905 conditions, 6205 events. 3854/6205 cut-off events. For 686636/686636 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39417 event pairs, 751 based on Foata normal form. 4/6206 useless extension candidates. Maximal degree in co-relation 52728. Up to 5628 conditions per place. [2024-06-27 21:31:10,666 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 432 selfloop transitions, 88 changer transitions 0/525 dead transitions. [2024-06-27 21:31:10,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 525 transitions, 8362 flow [2024-06-27 21:31:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 21:31:10,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 21:31:10,667 INFO L175 Difference]: Start difference. First operand has 390 places, 490 transitions, 6782 flow. Second operand 9 states and 174 transitions. [2024-06-27 21:31:10,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 525 transitions, 8362 flow [2024-06-27 21:31:13,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 525 transitions, 8212 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:13,137 INFO L231 Difference]: Finished difference. Result has 393 places, 496 transitions, 6997 flow [2024-06-27 21:31:13,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6632, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6997, PETRI_PLACES=393, PETRI_TRANSITIONS=496} [2024-06-27 21:31:13,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-27 21:31:13,138 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 496 transitions, 6997 flow [2024-06-27 21:31:13,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:13,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:13,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:13,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:31:13,138 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:13,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1673776179, now seen corresponding path program 2 times [2024-06-27 21:31:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842737241] [2024-06-27 21:31:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:13,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:13,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:13,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842737241] [2024-06-27 21:31:13,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842737241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:13,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:13,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563790537] [2024-06-27 21:31:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:13,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:13,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:13,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:13,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:13,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:13,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 496 transitions, 6997 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:13,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:13,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:13,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:15,507 INFO L124 PetriNetUnfolderBase]: 3906/6283 cut-off events. [2024-06-27 21:31:15,508 INFO L125 PetriNetUnfolderBase]: For 729540/729540 co-relation queries the response was YES. [2024-06-27 21:31:15,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54852 conditions, 6283 events. 3906/6283 cut-off events. For 729540/729540 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 39915 event pairs, 756 based on Foata normal form. 4/6284 useless extension candidates. Maximal degree in co-relation 54674. Up to 5805 conditions per place. [2024-06-27 21:31:15,607 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 454 selfloop transitions, 73 changer transitions 0/532 dead transitions. [2024-06-27 21:31:15,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 532 transitions, 8639 flow [2024-06-27 21:31:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 21:31:15,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-27 21:31:15,608 INFO L175 Difference]: Start difference. First operand has 393 places, 496 transitions, 6997 flow. Second operand 9 states and 172 transitions. [2024-06-27 21:31:15,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 532 transitions, 8639 flow [2024-06-27 21:31:18,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 532 transitions, 8426 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-27 21:31:18,008 INFO L231 Difference]: Finished difference. Result has 397 places, 502 transitions, 7131 flow [2024-06-27 21:31:18,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6820, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7131, PETRI_PLACES=397, PETRI_TRANSITIONS=502} [2024-06-27 21:31:18,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-27 21:31:18,009 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 502 transitions, 7131 flow [2024-06-27 21:31:18,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:18,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:18,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:18,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:31:18,009 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:18,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1847021279, now seen corresponding path program 3 times [2024-06-27 21:31:18,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:18,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220192690] [2024-06-27 21:31:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:18,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:18,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220192690] [2024-06-27 21:31:18,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220192690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:18,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:18,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:18,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558236784] [2024-06-27 21:31:18,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:18,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:18,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:18,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:18,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:18,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 502 transitions, 7131 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:18,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:18,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:18,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:20,364 INFO L124 PetriNetUnfolderBase]: 3894/6265 cut-off events. [2024-06-27 21:31:20,364 INFO L125 PetriNetUnfolderBase]: For 719514/719514 co-relation queries the response was YES. [2024-06-27 21:31:20,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54266 conditions, 6265 events. 3894/6265 cut-off events. For 719514/719514 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 39874 event pairs, 756 based on Foata normal form. 4/6266 useless extension candidates. Maximal degree in co-relation 54086. Up to 5797 conditions per place. [2024-06-27 21:31:20,463 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 453 selfloop transitions, 75 changer transitions 0/533 dead transitions. [2024-06-27 21:31:20,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 533 transitions, 8393 flow [2024-06-27 21:31:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:31:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:31:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-27 21:31:20,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-27 21:31:20,463 INFO L175 Difference]: Start difference. First operand has 397 places, 502 transitions, 7131 flow. Second operand 11 states and 199 transitions. [2024-06-27 21:31:20,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 533 transitions, 8393 flow [2024-06-27 21:31:23,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 533 transitions, 8204 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 21:31:23,389 INFO L231 Difference]: Finished difference. Result has 403 places, 502 transitions, 7098 flow [2024-06-27 21:31:23,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6942, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7098, PETRI_PLACES=403, PETRI_TRANSITIONS=502} [2024-06-27 21:31:23,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-27 21:31:23,390 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 502 transitions, 7098 flow [2024-06-27 21:31:23,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:23,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:23,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:23,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:31:23,390 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:23,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1673776334, now seen corresponding path program 3 times [2024-06-27 21:31:23,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:23,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884548460] [2024-06-27 21:31:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:23,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:24,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:24,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884548460] [2024-06-27 21:31:24,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884548460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:24,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:24,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:24,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959872546] [2024-06-27 21:31:24,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:24,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:24,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:24,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:24,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:24,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:24,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 502 transitions, 7098 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:24,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:24,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:24,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:25,906 INFO L124 PetriNetUnfolderBase]: 3961/6370 cut-off events. [2024-06-27 21:31:25,906 INFO L125 PetriNetUnfolderBase]: For 722281/722281 co-relation queries the response was YES. [2024-06-27 21:31:25,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55346 conditions, 6370 events. 3961/6370 cut-off events. For 722281/722281 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40647 event pairs, 769 based on Foata normal form. 2/6366 useless extension candidates. Maximal degree in co-relation 55164. Up to 6028 conditions per place. [2024-06-27 21:31:26,014 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 491 selfloop transitions, 56 changer transitions 0/552 dead transitions. [2024-06-27 21:31:26,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 552 transitions, 8936 flow [2024-06-27 21:31:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:31:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:31:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:31:26,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-27 21:31:26,015 INFO L175 Difference]: Start difference. First operand has 403 places, 502 transitions, 7098 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:31:26,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 552 transitions, 8936 flow [2024-06-27 21:31:28,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 552 transitions, 8724 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 21:31:28,386 INFO L231 Difference]: Finished difference. Result has 406 places, 531 transitions, 7756 flow [2024-06-27 21:31:28,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6933, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7756, PETRI_PLACES=406, PETRI_TRANSITIONS=531} [2024-06-27 21:31:28,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-27 21:31:28,387 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 531 transitions, 7756 flow [2024-06-27 21:31:28,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:28,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:28,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:28,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:31:28,387 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:28,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:28,387 INFO L85 PathProgramCache]: Analyzing trace with hash -477660775, now seen corresponding path program 4 times [2024-06-27 21:31:28,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:28,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739725825] [2024-06-27 21:31:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:28,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:29,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:29,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739725825] [2024-06-27 21:31:29,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739725825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:29,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:29,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:29,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135350525] [2024-06-27 21:31:29,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:29,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:29,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:29,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:29,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:29,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:29,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 531 transitions, 7756 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:29,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:29,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:29,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:30,740 INFO L124 PetriNetUnfolderBase]: 4045/6485 cut-off events. [2024-06-27 21:31:30,740 INFO L125 PetriNetUnfolderBase]: For 795673/795673 co-relation queries the response was YES. [2024-06-27 21:31:30,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58077 conditions, 6485 events. 4045/6485 cut-off events. For 795673/795673 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 41312 event pairs, 780 based on Foata normal form. 4/6486 useless extension candidates. Maximal degree in co-relation 57891. Up to 6055 conditions per place. [2024-06-27 21:31:30,836 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 501 selfloop transitions, 60 changer transitions 0/566 dead transitions. [2024-06-27 21:31:30,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 566 transitions, 9690 flow [2024-06-27 21:31:30,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:31:30,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:31:30,837 INFO L175 Difference]: Start difference. First operand has 406 places, 531 transitions, 7756 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:31:30,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 566 transitions, 9690 flow [2024-06-27 21:31:33,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 566 transitions, 9469 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-27 21:31:33,988 INFO L231 Difference]: Finished difference. Result has 411 places, 540 transitions, 7913 flow [2024-06-27 21:31:33,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7535, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7913, PETRI_PLACES=411, PETRI_TRANSITIONS=540} [2024-06-27 21:31:33,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-27 21:31:33,989 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 540 transitions, 7913 flow [2024-06-27 21:31:33,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:33,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:33,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:33,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:31:33,989 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:33,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash -477666355, now seen corresponding path program 5 times [2024-06-27 21:31:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:33,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120447629] [2024-06-27 21:31:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:33,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:34,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:34,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120447629] [2024-06-27 21:31:34,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120447629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:34,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:34,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:34,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473424790] [2024-06-27 21:31:34,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:34,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:34,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:34,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:34,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:34,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:34,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 540 transitions, 7913 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:34,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:34,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:34,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:36,451 INFO L124 PetriNetUnfolderBase]: 4033/6469 cut-off events. [2024-06-27 21:31:36,451 INFO L125 PetriNetUnfolderBase]: For 788521/788521 co-relation queries the response was YES. [2024-06-27 21:31:36,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57579 conditions, 6469 events. 4033/6469 cut-off events. For 788521/788521 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 41237 event pairs, 766 based on Foata normal form. 4/6470 useless extension candidates. Maximal degree in co-relation 57392. Up to 6047 conditions per place. [2024-06-27 21:31:36,541 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 499 selfloop transitions, 61 changer transitions 0/565 dead transitions. [2024-06-27 21:31:36,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 565 transitions, 9397 flow [2024-06-27 21:31:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:31:36,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-27 21:31:36,542 INFO L175 Difference]: Start difference. First operand has 411 places, 540 transitions, 7913 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:31:36,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 565 transitions, 9397 flow [2024-06-27 21:31:39,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 565 transitions, 9218 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-27 21:31:39,455 INFO L231 Difference]: Finished difference. Result has 416 places, 540 transitions, 7863 flow [2024-06-27 21:31:39,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7734, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7863, PETRI_PLACES=416, PETRI_TRANSITIONS=540} [2024-06-27 21:31:39,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-27 21:31:39,456 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 540 transitions, 7863 flow [2024-06-27 21:31:39,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:39,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:39,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:39,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:31:39,456 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:39,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:39,456 INFO L85 PathProgramCache]: Analyzing trace with hash -477666510, now seen corresponding path program 4 times [2024-06-27 21:31:39,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:39,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342127811] [2024-06-27 21:31:39,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:39,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:40,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:40,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342127811] [2024-06-27 21:31:40,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342127811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:40,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:40,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:40,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034830731] [2024-06-27 21:31:40,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:40,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:40,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:40,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:40,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:40,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:40,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 540 transitions, 7863 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:40,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:40,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:40,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:41,890 INFO L124 PetriNetUnfolderBase]: 4053/6493 cut-off events. [2024-06-27 21:31:41,890 INFO L125 PetriNetUnfolderBase]: For 794417/794417 co-relation queries the response was YES. [2024-06-27 21:31:41,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57823 conditions, 6493 events. 4053/6493 cut-off events. For 794417/794417 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 41338 event pairs, 768 based on Foata normal form. 3/6493 useless extension candidates. Maximal degree in co-relation 57634. Up to 6113 conditions per place. [2024-06-27 21:31:41,992 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 493 selfloop transitions, 72 changer transitions 0/570 dead transitions. [2024-06-27 21:31:41,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 570 transitions, 9353 flow [2024-06-27 21:31:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:31:41,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 21:31:41,993 INFO L175 Difference]: Start difference. First operand has 416 places, 540 transitions, 7863 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:31:41,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 570 transitions, 9353 flow [2024-06-27 21:31:45,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 570 transitions, 9229 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:31:45,126 INFO L231 Difference]: Finished difference. Result has 420 places, 552 transitions, 8243 flow [2024-06-27 21:31:45,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7739, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8243, PETRI_PLACES=420, PETRI_TRANSITIONS=552} [2024-06-27 21:31:45,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-27 21:31:45,126 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 552 transitions, 8243 flow [2024-06-27 21:31:45,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:45,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:45,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:45,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:31:45,126 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:45,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:45,127 INFO L85 PathProgramCache]: Analyzing trace with hash -470041998, now seen corresponding path program 1 times [2024-06-27 21:31:45,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:45,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309980466] [2024-06-27 21:31:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:45,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:45,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:45,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309980466] [2024-06-27 21:31:45,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309980466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:45,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:45,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:45,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699555167] [2024-06-27 21:31:45,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:45,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:45,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:45,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:45,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:45,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:45,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 552 transitions, 8243 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:45,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:45,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:45,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:47,573 INFO L124 PetriNetUnfolderBase]: 4068/6504 cut-off events. [2024-06-27 21:31:47,574 INFO L125 PetriNetUnfolderBase]: For 830589/830589 co-relation queries the response was YES. [2024-06-27 21:31:47,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58993 conditions, 6504 events. 4068/6504 cut-off events. For 830589/830589 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 41273 event pairs, 749 based on Foata normal form. 3/6504 useless extension candidates. Maximal degree in co-relation 58801. Up to 6089 conditions per place. [2024-06-27 21:31:47,680 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 506 selfloop transitions, 65 changer transitions 0/576 dead transitions. [2024-06-27 21:31:47,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 576 transitions, 9615 flow [2024-06-27 21:31:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:31:47,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 21:31:47,681 INFO L175 Difference]: Start difference. First operand has 420 places, 552 transitions, 8243 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:31:47,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 576 transitions, 9615 flow [2024-06-27 21:31:50,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 576 transitions, 9300 flow, removed 121 selfloop flow, removed 5 redundant places. [2024-06-27 21:31:50,581 INFO L231 Difference]: Finished difference. Result has 423 places, 555 transitions, 8162 flow [2024-06-27 21:31:50,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7928, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8162, PETRI_PLACES=423, PETRI_TRANSITIONS=555} [2024-06-27 21:31:50,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-27 21:31:50,581 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 555 transitions, 8162 flow [2024-06-27 21:31:50,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:50,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:50,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:50,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:31:50,581 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:50,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:50,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1715202757, now seen corresponding path program 6 times [2024-06-27 21:31:50,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:50,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894319936] [2024-06-27 21:31:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:50,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:51,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:51,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894319936] [2024-06-27 21:31:51,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894319936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:51,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:51,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:51,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578163741] [2024-06-27 21:31:51,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:51,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:51,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:51,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:51,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:51,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:51,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 555 transitions, 8162 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:51,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:51,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:51,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:52,886 INFO L124 PetriNetUnfolderBase]: 4056/6500 cut-off events. [2024-06-27 21:31:52,886 INFO L125 PetriNetUnfolderBase]: For 829202/829202 co-relation queries the response was YES. [2024-06-27 21:31:52,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58728 conditions, 6500 events. 4056/6500 cut-off events. For 829202/829202 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 41365 event pairs, 773 based on Foata normal form. 4/6501 useless extension candidates. Maximal degree in co-relation 58536. Up to 6168 conditions per place. [2024-06-27 21:31:52,992 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 527 selfloop transitions, 43 changer transitions 0/575 dead transitions. [2024-06-27 21:31:52,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 575 transitions, 9414 flow [2024-06-27 21:31:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:31:52,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 21:31:52,993 INFO L175 Difference]: Start difference. First operand has 423 places, 555 transitions, 8162 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:31:52,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 575 transitions, 9414 flow [2024-06-27 21:31:55,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 575 transitions, 9182 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:55,819 INFO L231 Difference]: Finished difference. Result has 426 places, 555 transitions, 8022 flow [2024-06-27 21:31:55,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7930, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8022, PETRI_PLACES=426, PETRI_TRANSITIONS=555} [2024-06-27 21:31:55,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-27 21:31:55,820 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 555 transitions, 8022 flow [2024-06-27 21:31:55,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:55,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:55,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:55,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:31:55,820 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:55,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:55,820 INFO L85 PathProgramCache]: Analyzing trace with hash -445940598, now seen corresponding path program 5 times [2024-06-27 21:31:55,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:55,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165133327] [2024-06-27 21:31:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:55,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:56,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:56,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165133327] [2024-06-27 21:31:56,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165133327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:56,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:56,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:56,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351327069] [2024-06-27 21:31:56,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:56,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:56,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:56,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:56,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:31:56,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 555 transitions, 8022 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:56,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:56,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:31:56,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:58,171 INFO L124 PetriNetUnfolderBase]: 4082/6529 cut-off events. [2024-06-27 21:31:58,171 INFO L125 PetriNetUnfolderBase]: For 844487/844487 co-relation queries the response was YES. [2024-06-27 21:31:58,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59222 conditions, 6529 events. 4082/6529 cut-off events. For 844487/844487 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 41535 event pairs, 788 based on Foata normal form. 2/6523 useless extension candidates. Maximal degree in co-relation 59029. Up to 5882 conditions per place. [2024-06-27 21:31:58,277 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 441 selfloop transitions, 146 changer transitions 0/592 dead transitions. [2024-06-27 21:31:58,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 592 transitions, 9833 flow [2024-06-27 21:31:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:31:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:31:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 21:31:58,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 21:31:58,278 INFO L175 Difference]: Start difference. First operand has 426 places, 555 transitions, 8022 flow. Second operand 10 states and 188 transitions. [2024-06-27 21:31:58,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 592 transitions, 9833 flow [2024-06-27 21:32:01,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 592 transitions, 9716 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:32:01,651 INFO L231 Difference]: Finished difference. Result has 429 places, 563 transitions, 8484 flow [2024-06-27 21:32:01,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7905, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8484, PETRI_PLACES=429, PETRI_TRANSITIONS=563} [2024-06-27 21:32:01,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-27 21:32:01,652 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 563 transitions, 8484 flow [2024-06-27 21:32:01,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:01,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:01,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:01,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:32:01,652 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:01,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1939827705, now seen corresponding path program 7 times [2024-06-27 21:32:01,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:01,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906927022] [2024-06-27 21:32:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:01,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:02,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:02,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906927022] [2024-06-27 21:32:02,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906927022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:02,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:02,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:02,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97502577] [2024-06-27 21:32:02,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:02,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:02,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:02,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:02,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:02,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:32:02,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 563 transitions, 8484 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:02,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:02,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:32:02,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:03,977 INFO L124 PetriNetUnfolderBase]: 4158/6632 cut-off events. [2024-06-27 21:32:03,977 INFO L125 PetriNetUnfolderBase]: For 929778/929778 co-relation queries the response was YES. [2024-06-27 21:32:04,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62803 conditions, 6632 events. 4158/6632 cut-off events. For 929778/929778 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 42194 event pairs, 770 based on Foata normal form. 4/6626 useless extension candidates. Maximal degree in co-relation 62608. Up to 5471 conditions per place. [2024-06-27 21:32:04,084 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 422 selfloop transitions, 178 changer transitions 0/605 dead transitions. [2024-06-27 21:32:04,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 605 transitions, 10903 flow [2024-06-27 21:32:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 21:32:04,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-27 21:32:04,085 INFO L175 Difference]: Start difference. First operand has 429 places, 563 transitions, 8484 flow. Second operand 9 states and 179 transitions. [2024-06-27 21:32:04,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 605 transitions, 10903 flow [2024-06-27 21:32:07,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 605 transitions, 10581 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:07,515 INFO L231 Difference]: Finished difference. Result has 432 places, 572 transitions, 8848 flow [2024-06-27 21:32:07,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8162, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8848, PETRI_PLACES=432, PETRI_TRANSITIONS=572} [2024-06-27 21:32:07,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-27 21:32:07,515 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 572 transitions, 8848 flow [2024-06-27 21:32:07,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:07,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:07,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:07,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:32:07,516 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:07,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:07,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1943546775, now seen corresponding path program 8 times [2024-06-27 21:32:07,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:07,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395920410] [2024-06-27 21:32:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:07,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:08,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395920410] [2024-06-27 21:32:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395920410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:08,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:08,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:08,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720196460] [2024-06-27 21:32:08,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:08,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:08,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:08,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:08,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:32:08,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 572 transitions, 8848 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:08,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:08,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:32:08,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:09,964 INFO L124 PetriNetUnfolderBase]: 4210/6724 cut-off events. [2024-06-27 21:32:09,964 INFO L125 PetriNetUnfolderBase]: For 979500/979500 co-relation queries the response was YES. [2024-06-27 21:32:10,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65175 conditions, 6724 events. 4210/6724 cut-off events. For 979500/979500 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42969 event pairs, 744 based on Foata normal form. 4/6718 useless extension candidates. Maximal degree in co-relation 64978. Up to 6025 conditions per place. [2024-06-27 21:32:10,079 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 479 selfloop transitions, 123 changer transitions 0/607 dead transitions. [2024-06-27 21:32:10,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 607 transitions, 10737 flow [2024-06-27 21:32:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:32:10,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-27 21:32:10,080 INFO L175 Difference]: Start difference. First operand has 432 places, 572 transitions, 8848 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:32:10,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 607 transitions, 10737 flow [2024-06-27 21:32:14,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 607 transitions, 10377 flow, removed 114 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:14,466 INFO L231 Difference]: Finished difference. Result has 437 places, 578 transitions, 8970 flow [2024-06-27 21:32:14,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8556, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8970, PETRI_PLACES=437, PETRI_TRANSITIONS=578} [2024-06-27 21:32:14,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-27 21:32:14,467 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 578 transitions, 8970 flow [2024-06-27 21:32:14,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:14,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:14,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:14,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:32:14,467 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:14,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:14,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1943552355, now seen corresponding path program 9 times [2024-06-27 21:32:14,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:14,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781925213] [2024-06-27 21:32:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:14,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:15,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:15,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781925213] [2024-06-27 21:32:15,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781925213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:15,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:15,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:15,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324333889] [2024-06-27 21:32:15,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:15,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:15,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:15,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:15,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:15,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:32:15,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 578 transitions, 8970 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:15,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:15,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:32:15,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:17,082 INFO L124 PetriNetUnfolderBase]: 4198/6708 cut-off events. [2024-06-27 21:32:17,082 INFO L125 PetriNetUnfolderBase]: For 962551/962551 co-relation queries the response was YES. [2024-06-27 21:32:17,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64405 conditions, 6708 events. 4198/6708 cut-off events. For 962551/962551 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42855 event pairs, 748 based on Foata normal form. 4/6702 useless extension candidates. Maximal degree in co-relation 64206. Up to 6017 conditions per place. [2024-06-27 21:32:17,202 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 479 selfloop transitions, 125 changer transitions 0/609 dead transitions. [2024-06-27 21:32:17,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 609 transitions, 10453 flow [2024-06-27 21:32:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:32:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:32:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-27 21:32:17,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-27 21:32:17,203 INFO L175 Difference]: Start difference. First operand has 437 places, 578 transitions, 8970 flow. Second operand 11 states and 200 transitions. [2024-06-27 21:32:17,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 609 transitions, 10453 flow [2024-06-27 21:32:21,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 609 transitions, 10200 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:21,086 INFO L231 Difference]: Finished difference. Result has 443 places, 578 transitions, 8973 flow [2024-06-27 21:32:21,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8717, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8973, PETRI_PLACES=443, PETRI_TRANSITIONS=578} [2024-06-27 21:32:21,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-27 21:32:21,086 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 578 transitions, 8973 flow [2024-06-27 21:32:21,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:21,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:21,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:21,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:32:21,087 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:21,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash -306408654, now seen corresponding path program 6 times [2024-06-27 21:32:21,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:21,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503331134] [2024-06-27 21:32:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:21,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:21,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503331134] [2024-06-27 21:32:21,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503331134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:21,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:21,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:21,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049123787] [2024-06-27 21:32:21,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:21,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:21,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:21,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:21,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:21,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:32:21,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 578 transitions, 8973 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:21,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:21,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:32:21,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:23,836 INFO L124 PetriNetUnfolderBase]: 4229/6735 cut-off events. [2024-06-27 21:32:23,836 INFO L125 PetriNetUnfolderBase]: For 978226/978226 co-relation queries the response was YES. [2024-06-27 21:32:23,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65428 conditions, 6735 events. 4229/6735 cut-off events. For 978226/978226 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42936 event pairs, 800 based on Foata normal form. 2/6727 useless extension candidates. Maximal degree in co-relation 65227. Up to 5939 conditions per place. [2024-06-27 21:32:23,951 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 415 selfloop transitions, 214 changer transitions 0/634 dead transitions. [2024-06-27 21:32:23,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 634 transitions, 11345 flow [2024-06-27 21:32:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:32:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:32:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 21:32:23,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-27 21:32:23,952 INFO L175 Difference]: Start difference. First operand has 443 places, 578 transitions, 8973 flow. Second operand 11 states and 208 transitions. [2024-06-27 21:32:23,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 634 transitions, 11345 flow [2024-06-27 21:32:28,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 634 transitions, 11084 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 21:32:28,162 INFO L231 Difference]: Finished difference. Result has 446 places, 600 transitions, 9751 flow [2024-06-27 21:32:28,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8712, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9751, PETRI_PLACES=446, PETRI_TRANSITIONS=600} [2024-06-27 21:32:28,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-27 21:32:28,163 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 600 transitions, 9751 flow [2024-06-27 21:32:28,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:28,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:28,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:28,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:32:28,163 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:28,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:28,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1943546620, now seen corresponding path program 7 times [2024-06-27 21:32:28,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:28,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743808097] [2024-06-27 21:32:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:28,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:29,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:29,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743808097] [2024-06-27 21:32:29,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743808097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:29,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:29,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:29,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609083382] [2024-06-27 21:32:29,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:29,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:29,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:32:29,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 600 transitions, 9751 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:29,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:29,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:32:29,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:30,948 INFO L124 PetriNetUnfolderBase]: 4239/6755 cut-off events. [2024-06-27 21:32:30,948 INFO L125 PetriNetUnfolderBase]: For 1008781/1008781 co-relation queries the response was YES. [2024-06-27 21:32:31,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67160 conditions, 6755 events. 4239/6755 cut-off events. For 1008781/1008781 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 43079 event pairs, 798 based on Foata normal form. 2/6747 useless extension candidates. Maximal degree in co-relation 66956. Up to 6330 conditions per place. [2024-06-27 21:32:31,065 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 529 selfloop transitions, 89 changer transitions 0/623 dead transitions. [2024-06-27 21:32:31,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 623 transitions, 11192 flow [2024-06-27 21:32:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:32:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:32:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 21:32:31,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-27 21:32:31,067 INFO L175 Difference]: Start difference. First operand has 446 places, 600 transitions, 9751 flow. Second operand 10 states and 174 transitions. [2024-06-27 21:32:31,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 623 transitions, 11192 flow [2024-06-27 21:32:35,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 623 transitions, 10798 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:35,424 INFO L231 Difference]: Finished difference. Result has 450 places, 604 transitions, 9660 flow [2024-06-27 21:32:35,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9357, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9660, PETRI_PLACES=450, PETRI_TRANSITIONS=604} [2024-06-27 21:32:35,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-27 21:32:35,424 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 604 transitions, 9660 flow [2024-06-27 21:32:35,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:35,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:35,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:35,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:32:35,425 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:35,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:35,425 INFO L85 PathProgramCache]: Analyzing trace with hash -591418159, now seen corresponding path program 10 times [2024-06-27 21:32:35,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:35,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878913753] [2024-06-27 21:32:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:35,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:36,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:36,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878913753] [2024-06-27 21:32:36,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878913753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:36,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:36,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:36,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824118970] [2024-06-27 21:32:36,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:36,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:36,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:36,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:32:36,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 604 transitions, 9660 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:36,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:36,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:32:36,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:37,883 INFO L124 PetriNetUnfolderBase]: 4259/6779 cut-off events. [2024-06-27 21:32:37,884 INFO L125 PetriNetUnfolderBase]: For 1033145/1033145 co-relation queries the response was YES. [2024-06-27 21:32:37,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67434 conditions, 6779 events. 4259/6779 cut-off events. For 1033145/1033145 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 43168 event pairs, 744 based on Foata normal form. 4/6773 useless extension candidates. Maximal degree in co-relation 67228. Up to 5576 conditions per place. [2024-06-27 21:32:37,998 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 427 selfloop transitions, 207 changer transitions 0/639 dead transitions. [2024-06-27 21:32:37,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 639 transitions, 11733 flow [2024-06-27 21:32:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 21:32:37,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 21:32:37,999 INFO L175 Difference]: Start difference. First operand has 450 places, 604 transitions, 9660 flow. Second operand 9 states and 177 transitions. [2024-06-27 21:32:37,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 639 transitions, 11733 flow [2024-06-27 21:32:42,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 639 transitions, 11482 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-27 21:32:42,752 INFO L231 Difference]: Finished difference. Result has 451 places, 607 transitions, 9911 flow [2024-06-27 21:32:42,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9911, PETRI_PLACES=451, PETRI_TRANSITIONS=607} [2024-06-27 21:32:42,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-27 21:32:42,753 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 607 transitions, 9911 flow [2024-06-27 21:32:42,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:42,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:42,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:42,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:32:42,753 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:42,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:42,754 INFO L85 PathProgramCache]: Analyzing trace with hash -210911604, now seen corresponding path program 8 times [2024-06-27 21:32:42,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:42,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186726490] [2024-06-27 21:32:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:42,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:43,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186726490] [2024-06-27 21:32:43,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186726490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:43,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:43,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132745352] [2024-06-27 21:32:43,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:43,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:43,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:32:43,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 607 transitions, 9911 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:43,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:43,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:32:43,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:45,483 INFO L124 PetriNetUnfolderBase]: 4277/6812 cut-off events. [2024-06-27 21:32:45,483 INFO L125 PetriNetUnfolderBase]: For 1044427/1044427 co-relation queries the response was YES. [2024-06-27 21:32:45,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68506 conditions, 6812 events. 4277/6812 cut-off events. For 1044427/1044427 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 43482 event pairs, 808 based on Foata normal form. 2/6804 useless extension candidates. Maximal degree in co-relation 68299. Up to 6000 conditions per place. [2024-06-27 21:32:45,601 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 406 selfloop transitions, 230 changer transitions 0/641 dead transitions. [2024-06-27 21:32:45,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 641 transitions, 12012 flow [2024-06-27 21:32:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:32:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:32:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-27 21:32:45,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-27 21:32:45,602 INFO L175 Difference]: Start difference. First operand has 451 places, 607 transitions, 9911 flow. Second operand 11 states and 202 transitions. [2024-06-27 21:32:45,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 641 transitions, 12012 flow [2024-06-27 21:32:50,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 641 transitions, 11493 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 21:32:50,401 INFO L231 Difference]: Finished difference. Result has 455 places, 614 transitions, 10058 flow [2024-06-27 21:32:50,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9392, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10058, PETRI_PLACES=455, PETRI_TRANSITIONS=614} [2024-06-27 21:32:50,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 21:32:50,402 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 614 transitions, 10058 flow [2024-06-27 21:32:50,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:50,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:50,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:50,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:32:50,402 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:50,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash -207620179, now seen corresponding path program 11 times [2024-06-27 21:32:50,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:50,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873570600] [2024-06-27 21:32:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:50,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:51,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:51,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873570600] [2024-06-27 21:32:51,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873570600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:51,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:51,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:51,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137604887] [2024-06-27 21:32:51,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:51,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:51,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:51,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:51,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:32:51,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 614 transitions, 10058 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:51,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:51,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:32:51,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:53,075 INFO L124 PetriNetUnfolderBase]: 4297/6841 cut-off events. [2024-06-27 21:32:53,075 INFO L125 PetriNetUnfolderBase]: For 1076133/1076133 co-relation queries the response was YES. [2024-06-27 21:32:53,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68647 conditions, 6841 events. 4297/6841 cut-off events. For 1076133/1076133 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 43704 event pairs, 794 based on Foata normal form. 4/6842 useless extension candidates. Maximal degree in co-relation 68439. Up to 6484 conditions per place. [2024-06-27 21:32:53,201 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 587 selfloop transitions, 47 changer transitions 0/639 dead transitions. [2024-06-27 21:32:53,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 639 transitions, 11516 flow [2024-06-27 21:32:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:32:53,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 21:32:53,202 INFO L175 Difference]: Start difference. First operand has 455 places, 614 transitions, 10058 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:32:53,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 639 transitions, 11516 flow [2024-06-27 21:32:58,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 639 transitions, 11085 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 21:32:58,244 INFO L231 Difference]: Finished difference. Result has 457 places, 617 transitions, 9811 flow [2024-06-27 21:32:58,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9627, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9811, PETRI_PLACES=457, PETRI_TRANSITIONS=617} [2024-06-27 21:32:58,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-27 21:32:58,244 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 617 transitions, 9811 flow [2024-06-27 21:32:58,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:58,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:58,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:58,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:32:58,245 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:58,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:58,245 INFO L85 PathProgramCache]: Analyzing trace with hash -207633199, now seen corresponding path program 12 times [2024-06-27 21:32:58,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:58,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553468069] [2024-06-27 21:32:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:58,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:58,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:58,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553468069] [2024-06-27 21:32:58,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553468069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:58,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:58,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:58,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208213703] [2024-06-27 21:32:58,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:58,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:58,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:58,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:58,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:32:58,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 617 transitions, 9811 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:58,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:58,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:32:58,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:00,781 INFO L124 PetriNetUnfolderBase]: 4317/6870 cut-off events. [2024-06-27 21:33:00,781 INFO L125 PetriNetUnfolderBase]: For 1087631/1087631 co-relation queries the response was YES. [2024-06-27 21:33:00,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68608 conditions, 6870 events. 4317/6870 cut-off events. For 1087631/1087631 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 43880 event pairs, 754 based on Foata normal form. 4/6864 useless extension candidates. Maximal degree in co-relation 68399. Up to 5633 conditions per place. [2024-06-27 21:33:00,907 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 429 selfloop transitions, 214 changer transitions 0/648 dead transitions. [2024-06-27 21:33:00,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 648 transitions, 11669 flow [2024-06-27 21:33:00,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:33:00,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-27 21:33:00,908 INFO L175 Difference]: Start difference. First operand has 457 places, 617 transitions, 9811 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:33:00,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 648 transitions, 11669 flow [2024-06-27 21:33:05,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 648 transitions, 11410 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 21:33:05,809 INFO L231 Difference]: Finished difference. Result has 458 places, 620 transitions, 10070 flow [2024-06-27 21:33:05,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9552, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10070, PETRI_PLACES=458, PETRI_TRANSITIONS=620} [2024-06-27 21:33:05,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-27 21:33:05,809 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 620 transitions, 10070 flow [2024-06-27 21:33:05,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:05,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:05,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:05,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:33:05,809 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:05,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:05,810 INFO L85 PathProgramCache]: Analyzing trace with hash -20317864, now seen corresponding path program 9 times [2024-06-27 21:33:05,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:05,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024815887] [2024-06-27 21:33:05,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:05,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:06,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:06,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024815887] [2024-06-27 21:33:06,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024815887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:06,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:06,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:06,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278829044] [2024-06-27 21:33:06,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:06,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:06,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:06,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:06,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:33:06,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 620 transitions, 10070 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:06,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:06,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:33:06,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:08,718 INFO L124 PetriNetUnfolderBase]: 4346/6922 cut-off events. [2024-06-27 21:33:08,719 INFO L125 PetriNetUnfolderBase]: For 1106138/1106138 co-relation queries the response was YES. [2024-06-27 21:33:08,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70022 conditions, 6922 events. 4346/6922 cut-off events. For 1106138/1106138 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 44292 event pairs, 822 based on Foata normal form. 1/6913 useless extension candidates. Maximal degree in co-relation 69812. Up to 6508 conditions per place. [2024-06-27 21:33:08,846 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 565 selfloop transitions, 90 changer transitions 0/660 dead transitions. [2024-06-27 21:33:08,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 660 transitions, 12133 flow [2024-06-27 21:33:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:33:08,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 21:33:08,847 INFO L175 Difference]: Start difference. First operand has 458 places, 620 transitions, 10070 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:33:08,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 660 transitions, 12133 flow [2024-06-27 21:33:14,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 660 transitions, 11756 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:14,013 INFO L231 Difference]: Finished difference. Result has 463 places, 645 transitions, 10437 flow [2024-06-27 21:33:14,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9696, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10437, PETRI_PLACES=463, PETRI_TRANSITIONS=645} [2024-06-27 21:33:14,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-27 21:33:14,013 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 645 transitions, 10437 flow [2024-06-27 21:33:14,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:14,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:14,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:14,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:33:14,013 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:14,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:14,014 INFO L85 PathProgramCache]: Analyzing trace with hash -936842855, now seen corresponding path program 13 times [2024-06-27 21:33:14,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:14,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957163723] [2024-06-27 21:33:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:14,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957163723] [2024-06-27 21:33:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957163723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:14,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:14,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:14,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459250644] [2024-06-27 21:33:14,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:14,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:14,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:14,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:14,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:33:14,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 645 transitions, 10437 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:14,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:14,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:33:14,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:16,852 INFO L124 PetriNetUnfolderBase]: 4494/7156 cut-off events. [2024-06-27 21:33:16,852 INFO L125 PetriNetUnfolderBase]: For 1261623/1261623 co-relation queries the response was YES. [2024-06-27 21:33:16,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74263 conditions, 7156 events. 4494/7156 cut-off events. For 1261623/1261623 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 46077 event pairs, 780 based on Foata normal form. 4/7150 useless extension candidates. Maximal degree in co-relation 74050. Up to 6224 conditions per place. [2024-06-27 21:33:16,989 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 524 selfloop transitions, 168 changer transitions 0/697 dead transitions. [2024-06-27 21:33:16,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 697 transitions, 13162 flow [2024-06-27 21:33:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:33:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:33:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 221 transitions. [2024-06-27 21:33:16,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491869918699187 [2024-06-27 21:33:16,989 INFO L175 Difference]: Start difference. First operand has 463 places, 645 transitions, 10437 flow. Second operand 12 states and 221 transitions. [2024-06-27 21:33:16,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 697 transitions, 13162 flow [2024-06-27 21:33:22,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 697 transitions, 13008 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-27 21:33:22,305 INFO L231 Difference]: Finished difference. Result has 473 places, 660 transitions, 11104 flow [2024-06-27 21:33:22,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10315, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11104, PETRI_PLACES=473, PETRI_TRANSITIONS=660} [2024-06-27 21:33:22,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-27 21:33:22,306 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 660 transitions, 11104 flow [2024-06-27 21:33:22,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:22,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:22,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:22,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:33:22,306 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:22,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash -928128755, now seen corresponding path program 14 times [2024-06-27 21:33:22,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:22,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410081721] [2024-06-27 21:33:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:22,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:23,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:23,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410081721] [2024-06-27 21:33:23,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410081721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:23,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:23,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:23,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277591314] [2024-06-27 21:33:23,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:23,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:23,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:23,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:33:23,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 660 transitions, 11104 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:23,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:23,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:33:23,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:25,189 INFO L124 PetriNetUnfolderBase]: 4524/7181 cut-off events. [2024-06-27 21:33:25,189 INFO L125 PetriNetUnfolderBase]: For 1287950/1287950 co-relation queries the response was YES. [2024-06-27 21:33:25,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75394 conditions, 7181 events. 4524/7181 cut-off events. For 1287950/1287950 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 46150 event pairs, 845 based on Foata normal form. 4/7182 useless extension candidates. Maximal degree in co-relation 75179. Up to 6829 conditions per place. [2024-06-27 21:33:25,323 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 643 selfloop transitions, 38 changer transitions 0/686 dead transitions. [2024-06-27 21:33:25,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 686 transitions, 12706 flow [2024-06-27 21:33:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:33:25,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 21:33:25,324 INFO L175 Difference]: Start difference. First operand has 473 places, 660 transitions, 11104 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:33:25,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 686 transitions, 12706 flow [2024-06-27 21:33:30,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 686 transitions, 12287 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-06-27 21:33:30,892 INFO L231 Difference]: Finished difference. Result has 474 places, 666 transitions, 10905 flow [2024-06-27 21:33:30,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10694, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10905, PETRI_PLACES=474, PETRI_TRANSITIONS=666} [2024-06-27 21:33:30,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-27 21:33:30,893 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 666 transitions, 10905 flow [2024-06-27 21:33:30,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:30,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:30,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:30,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:33:30,893 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:30,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash 964252857, now seen corresponding path program 15 times [2024-06-27 21:33:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:30,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164527666] [2024-06-27 21:33:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:30,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:31,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:31,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164527666] [2024-06-27 21:33:31,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164527666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:31,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:31,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:31,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992518787] [2024-06-27 21:33:31,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:31,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:31,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:31,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:31,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:33:31,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 666 transitions, 10905 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:31,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:31,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:33:31,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:33,681 INFO L124 PetriNetUnfolderBase]: 4512/7180 cut-off events. [2024-06-27 21:33:33,681 INFO L125 PetriNetUnfolderBase]: For 1269510/1269510 co-relation queries the response was YES. [2024-06-27 21:33:33,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74146 conditions, 7180 events. 4512/7180 cut-off events. For 1269510/1269510 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 46236 event pairs, 774 based on Foata normal form. 4/7174 useless extension candidates. Maximal degree in co-relation 73930. Up to 6238 conditions per place. [2024-06-27 21:33:33,817 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 520 selfloop transitions, 168 changer transitions 0/693 dead transitions. [2024-06-27 21:33:33,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 693 transitions, 13024 flow [2024-06-27 21:33:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 21:33:33,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-27 21:33:33,818 INFO L175 Difference]: Start difference. First operand has 474 places, 666 transitions, 10905 flow. Second operand 9 states and 172 transitions. [2024-06-27 21:33:33,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 693 transitions, 13024 flow [2024-06-27 21:33:39,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 693 transitions, 12886 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:39,541 INFO L231 Difference]: Finished difference. Result has 477 places, 666 transitions, 11110 flow [2024-06-27 21:33:39,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10767, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11110, PETRI_PLACES=477, PETRI_TRANSITIONS=666} [2024-06-27 21:33:39,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-27 21:33:39,542 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 666 transitions, 11110 flow [2024-06-27 21:33:39,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:39,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:39,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:39,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:33:39,542 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:39,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:39,543 INFO L85 PathProgramCache]: Analyzing trace with hash 964252702, now seen corresponding path program 10 times [2024-06-27 21:33:39,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:39,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212066523] [2024-06-27 21:33:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:39,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:40,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212066523] [2024-06-27 21:33:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212066523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:40,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:40,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:40,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337142815] [2024-06-27 21:33:40,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:40,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:40,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:40,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:33:40,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 666 transitions, 11110 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:40,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:40,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:33:40,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:42,621 INFO L124 PetriNetUnfolderBase]: 4514/7181 cut-off events. [2024-06-27 21:33:42,621 INFO L125 PetriNetUnfolderBase]: For 1267035/1267035 co-relation queries the response was YES. [2024-06-27 21:33:42,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74593 conditions, 7181 events. 4514/7181 cut-off events. For 1267035/1267035 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 46164 event pairs, 864 based on Foata normal form. 2/7173 useless extension candidates. Maximal degree in co-relation 74376. Up to 6679 conditions per place. [2024-06-27 21:33:42,738 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 563 selfloop transitions, 116 changer transitions 0/684 dead transitions. [2024-06-27 21:33:42,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 684 transitions, 12603 flow [2024-06-27 21:33:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:33:42,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 21:33:42,739 INFO L175 Difference]: Start difference. First operand has 477 places, 666 transitions, 11110 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:33:42,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 684 transitions, 12603 flow [2024-06-27 21:33:48,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 684 transitions, 12285 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:48,127 INFO L231 Difference]: Finished difference. Result has 481 places, 669 transitions, 11126 flow [2024-06-27 21:33:48,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10792, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11126, PETRI_PLACES=481, PETRI_TRANSITIONS=669} [2024-06-27 21:33:48,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-27 21:33:48,128 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 669 transitions, 11126 flow [2024-06-27 21:33:48,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:48,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:48,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:48,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:33:48,129 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:48,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:48,129 INFO L85 PathProgramCache]: Analyzing trace with hash -936848590, now seen corresponding path program 11 times [2024-06-27 21:33:48,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:48,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117801767] [2024-06-27 21:33:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:48,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:48,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:48,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117801767] [2024-06-27 21:33:48,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117801767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:48,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:48,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:48,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693457648] [2024-06-27 21:33:48,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:48,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:48,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:48,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:33:48,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 669 transitions, 11126 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:48,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:48,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:33:48,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:51,095 INFO L124 PetriNetUnfolderBase]: 4516/7192 cut-off events. [2024-06-27 21:33:51,096 INFO L125 PetriNetUnfolderBase]: For 1277405/1277405 co-relation queries the response was YES. [2024-06-27 21:33:51,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74273 conditions, 7192 events. 4516/7192 cut-off events. For 1277405/1277405 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 46369 event pairs, 862 based on Foata normal form. 2/7184 useless extension candidates. Maximal degree in co-relation 74055. Up to 6682 conditions per place. [2024-06-27 21:33:51,224 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 569 selfloop transitions, 117 changer transitions 0/691 dead transitions. [2024-06-27 21:33:51,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 691 transitions, 12668 flow [2024-06-27 21:33:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:33:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:33:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 21:33:51,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-27 21:33:51,225 INFO L175 Difference]: Start difference. First operand has 481 places, 669 transitions, 11126 flow. Second operand 11 states and 190 transitions. [2024-06-27 21:33:51,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 691 transitions, 12668 flow [2024-06-27 21:33:56,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 691 transitions, 12334 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-27 21:33:56,741 INFO L231 Difference]: Finished difference. Result has 485 places, 672 transitions, 11145 flow [2024-06-27 21:33:56,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10792, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11145, PETRI_PLACES=485, PETRI_TRANSITIONS=672} [2024-06-27 21:33:56,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-27 21:33:56,742 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 672 transitions, 11145 flow [2024-06-27 21:33:56,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:56,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:56,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:56,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:33:56,743 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:56,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:56,743 INFO L85 PathProgramCache]: Analyzing trace with hash 969793797, now seen corresponding path program 16 times [2024-06-27 21:33:56,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:56,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377067233] [2024-06-27 21:33:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:57,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:57,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377067233] [2024-06-27 21:33:57,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377067233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:57,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:57,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:57,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548837850] [2024-06-27 21:33:57,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:57,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:57,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:57,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:57,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:33:57,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 672 transitions, 11145 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:57,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:57,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:33:57,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:59,754 INFO L124 PetriNetUnfolderBase]: 4504/7151 cut-off events. [2024-06-27 21:33:59,754 INFO L125 PetriNetUnfolderBase]: For 1284434/1284434 co-relation queries the response was YES. [2024-06-27 21:33:59,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73662 conditions, 7151 events. 4504/7151 cut-off events. For 1284434/1284434 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 45914 event pairs, 815 based on Foata normal form. 4/7152 useless extension candidates. Maximal degree in co-relation 73443. Up to 6743 conditions per place. [2024-06-27 21:33:59,882 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 643 selfloop transitions, 48 changer transitions 0/696 dead transitions. [2024-06-27 21:33:59,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 696 transitions, 12923 flow [2024-06-27 21:33:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:33:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:33:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 21:33:59,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-27 21:33:59,883 INFO L175 Difference]: Start difference. First operand has 485 places, 672 transitions, 11145 flow. Second operand 11 states and 190 transitions. [2024-06-27 21:33:59,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 696 transitions, 12923 flow [2024-06-27 21:34:05,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 696 transitions, 12575 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-27 21:34:05,390 INFO L231 Difference]: Finished difference. Result has 487 places, 672 transitions, 10899 flow [2024-06-27 21:34:05,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10797, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10899, PETRI_PLACES=487, PETRI_TRANSITIONS=672} [2024-06-27 21:34:05,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-27 21:34:05,390 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 672 transitions, 10899 flow [2024-06-27 21:34:05,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:05,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:05,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:05,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:34:05,391 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:05,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:05,391 INFO L85 PathProgramCache]: Analyzing trace with hash -922766375, now seen corresponding path program 17 times [2024-06-27 21:34:05,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:05,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279305403] [2024-06-27 21:34:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:05,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:06,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:06,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279305403] [2024-06-27 21:34:06,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279305403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:06,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:06,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:06,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842861330] [2024-06-27 21:34:06,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:06,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:06,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:06,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:06,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:06,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:06,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 672 transitions, 10899 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:06,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:06,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:06,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:08,395 INFO L124 PetriNetUnfolderBase]: 4492/7139 cut-off events. [2024-06-27 21:34:08,395 INFO L125 PetriNetUnfolderBase]: For 1268871/1268871 co-relation queries the response was YES. [2024-06-27 21:34:08,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72917 conditions, 7139 events. 4492/7139 cut-off events. For 1268871/1268871 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 45892 event pairs, 829 based on Foata normal form. 4/7140 useless extension candidates. Maximal degree in co-relation 72697. Up to 6735 conditions per place. [2024-06-27 21:34:08,524 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 647 selfloop transitions, 48 changer transitions 0/700 dead transitions. [2024-06-27 21:34:08,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 700 transitions, 12489 flow [2024-06-27 21:34:08,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:34:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:34:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 220 transitions. [2024-06-27 21:34:08,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41275797373358347 [2024-06-27 21:34:08,525 INFO L175 Difference]: Start difference. First operand has 487 places, 672 transitions, 10899 flow. Second operand 13 states and 220 transitions. [2024-06-27 21:34:08,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 700 transitions, 12489 flow [2024-06-27 21:34:14,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 700 transitions, 12178 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-27 21:34:14,314 INFO L231 Difference]: Finished difference. Result has 491 places, 672 transitions, 10690 flow [2024-06-27 21:34:14,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10588, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10690, PETRI_PLACES=491, PETRI_TRANSITIONS=672} [2024-06-27 21:34:14,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-27 21:34:14,315 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 672 transitions, 10690 flow [2024-06-27 21:34:14,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:14,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:14,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:14,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:34:14,315 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:14,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash -936848435, now seen corresponding path program 18 times [2024-06-27 21:34:14,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:14,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804641404] [2024-06-27 21:34:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:14,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:14,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:14,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804641404] [2024-06-27 21:34:14,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804641404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:14,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:14,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:14,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923235287] [2024-06-27 21:34:14,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:14,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:14,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:15,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:15,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 672 transitions, 10690 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:15,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:15,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:15,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:17,092 INFO L124 PetriNetUnfolderBase]: 4480/7146 cut-off events. [2024-06-27 21:34:17,092 INFO L125 PetriNetUnfolderBase]: For 1247896/1247896 co-relation queries the response was YES. [2024-06-27 21:34:17,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72077 conditions, 7146 events. 4480/7146 cut-off events. For 1247896/1247896 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 46177 event pairs, 768 based on Foata normal form. 4/7140 useless extension candidates. Maximal degree in co-relation 71856. Up to 6220 conditions per place. [2024-06-27 21:34:17,234 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 530 selfloop transitions, 170 changer transitions 0/705 dead transitions. [2024-06-27 21:34:17,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 705 transitions, 12451 flow [2024-06-27 21:34:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:34:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:34:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-27 21:34:17,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523281596452328 [2024-06-27 21:34:17,235 INFO L175 Difference]: Start difference. First operand has 491 places, 672 transitions, 10690 flow. Second operand 11 states and 204 transitions. [2024-06-27 21:34:17,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 705 transitions, 12451 flow [2024-06-27 21:34:24,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 705 transitions, 12265 flow, removed 28 selfloop flow, removed 14 redundant places. [2024-06-27 21:34:24,249 INFO L231 Difference]: Finished difference. Result has 488 places, 672 transitions, 10851 flow [2024-06-27 21:34:24,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10504, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10851, PETRI_PLACES=488, PETRI_TRANSITIONS=672} [2024-06-27 21:34:24,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-27 21:34:24,249 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 672 transitions, 10851 flow [2024-06-27 21:34:24,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:24,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:24,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:24,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 21:34:24,250 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:24,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash -716944330, now seen corresponding path program 2 times [2024-06-27 21:34:24,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:24,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337576591] [2024-06-27 21:34:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:24,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:24,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:24,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337576591] [2024-06-27 21:34:24,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337576591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:24,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:24,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:24,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829629262] [2024-06-27 21:34:24,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:24,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:24,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:24,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:25,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:25,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 672 transitions, 10851 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:25,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:25,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:25,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:27,034 INFO L124 PetriNetUnfolderBase]: 4495/7174 cut-off events. [2024-06-27 21:34:27,034 INFO L125 PetriNetUnfolderBase]: For 1264162/1264162 co-relation queries the response was YES. [2024-06-27 21:34:27,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72813 conditions, 7174 events. 4495/7174 cut-off events. For 1264162/1264162 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 46359 event pairs, 824 based on Foata normal form. 3/7174 useless extension candidates. Maximal degree in co-relation 72591. Up to 6586 conditions per place. [2024-06-27 21:34:27,171 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 591 selfloop transitions, 99 changer transitions 0/695 dead transitions. [2024-06-27 21:34:27,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 695 transitions, 12471 flow [2024-06-27 21:34:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-27 21:34:27,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-27 21:34:27,172 INFO L175 Difference]: Start difference. First operand has 488 places, 672 transitions, 10851 flow. Second operand 6 states and 124 transitions. [2024-06-27 21:34:27,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 695 transitions, 12471 flow [2024-06-27 21:34:33,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 695 transitions, 12071 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 21:34:33,184 INFO L231 Difference]: Finished difference. Result has 483 places, 675 transitions, 10830 flow [2024-06-27 21:34:33,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10451, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10830, PETRI_PLACES=483, PETRI_TRANSITIONS=675} [2024-06-27 21:34:33,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-27 21:34:33,185 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 675 transitions, 10830 flow [2024-06-27 21:34:33,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:33,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:33,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:33,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 21:34:33,186 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:33,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:33,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1938216138, now seen corresponding path program 3 times [2024-06-27 21:34:33,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:33,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801703017] [2024-06-27 21:34:33,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:33,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:33,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:33,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801703017] [2024-06-27 21:34:33,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801703017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:33,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:33,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:33,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112982236] [2024-06-27 21:34:33,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:33,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:33,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:33,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:33,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:34,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:34,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 675 transitions, 10830 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:34,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:34,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:34,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:36,210 INFO L124 PetriNetUnfolderBase]: 4505/7190 cut-off events. [2024-06-27 21:34:36,210 INFO L125 PetriNetUnfolderBase]: For 1277690/1277690 co-relation queries the response was YES. [2024-06-27 21:34:36,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73329 conditions, 7190 events. 4505/7190 cut-off events. For 1277690/1277690 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 46447 event pairs, 812 based on Foata normal form. 2/7189 useless extension candidates. Maximal degree in co-relation 73106. Up to 6516 conditions per place. [2024-06-27 21:34:36,331 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 562 selfloop transitions, 137 changer transitions 0/704 dead transitions. [2024-06-27 21:34:36,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 704 transitions, 12530 flow [2024-06-27 21:34:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 21:34:36,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087108013937283 [2024-06-27 21:34:36,332 INFO L175 Difference]: Start difference. First operand has 483 places, 675 transitions, 10830 flow. Second operand 7 states and 146 transitions. [2024-06-27 21:34:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 704 transitions, 12530 flow [2024-06-27 21:34:43,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 704 transitions, 12304 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:43,108 INFO L231 Difference]: Finished difference. Result has 485 places, 678 transitions, 11023 flow [2024-06-27 21:34:43,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10604, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11023, PETRI_PLACES=485, PETRI_TRANSITIONS=678} [2024-06-27 21:34:43,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-27 21:34:43,109 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 678 transitions, 11023 flow [2024-06-27 21:34:43,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:43,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:43,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:43,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 21:34:43,109 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:43,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:43,110 INFO L85 PathProgramCache]: Analyzing trace with hash -717211457, now seen corresponding path program 19 times [2024-06-27 21:34:43,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:43,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819087971] [2024-06-27 21:34:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:43,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:43,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:43,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819087971] [2024-06-27 21:34:43,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819087971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:43,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:43,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:43,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591399639] [2024-06-27 21:34:43,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:43,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:43,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:43,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:43,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 678 transitions, 11023 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:43,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:43,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:43,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:45,803 INFO L124 PetriNetUnfolderBase]: 4525/7214 cut-off events. [2024-06-27 21:34:45,804 INFO L125 PetriNetUnfolderBase]: For 1300467/1300467 co-relation queries the response was YES. [2024-06-27 21:34:45,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74079 conditions, 7214 events. 4525/7214 cut-off events. For 1300467/1300467 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46553 event pairs, 849 based on Foata normal form. 4/7215 useless extension candidates. Maximal degree in co-relation 73856. Up to 6748 conditions per place. [2024-06-27 21:34:45,936 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 642 selfloop transitions, 60 changer transitions 0/707 dead transitions. [2024-06-27 21:34:45,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 707 transitions, 12691 flow [2024-06-27 21:34:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 21:34:45,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-27 21:34:45,936 INFO L175 Difference]: Start difference. First operand has 485 places, 678 transitions, 11023 flow. Second operand 7 states and 142 transitions. [2024-06-27 21:34:45,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 707 transitions, 12691 flow [2024-06-27 21:34:52,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 707 transitions, 12432 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:52,559 INFO L231 Difference]: Finished difference. Result has 487 places, 681 transitions, 11009 flow [2024-06-27 21:34:52,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10764, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11009, PETRI_PLACES=487, PETRI_TRANSITIONS=681} [2024-06-27 21:34:52,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-27 21:34:52,560 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 681 transitions, 11009 flow [2024-06-27 21:34:52,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:52,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:52,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:52,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 21:34:52,560 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:52,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:52,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1946497075, now seen corresponding path program 20 times [2024-06-27 21:34:52,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:52,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461697317] [2024-06-27 21:34:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:52,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:53,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461697317] [2024-06-27 21:34:53,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461697317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:53,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:53,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:53,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465399840] [2024-06-27 21:34:53,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:53,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:53,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:53,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:53,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:53,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 681 transitions, 11009 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:53,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:53,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:53,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:55,341 INFO L124 PetriNetUnfolderBase]: 4587/7310 cut-off events. [2024-06-27 21:34:55,342 INFO L125 PetriNetUnfolderBase]: For 1335159/1335159 co-relation queries the response was YES. [2024-06-27 21:34:55,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75354 conditions, 7310 events. 4587/7310 cut-off events. For 1335159/1335159 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 47319 event pairs, 831 based on Foata normal form. 4/7311 useless extension candidates. Maximal degree in co-relation 75131. Up to 6657 conditions per place. [2024-06-27 21:34:55,475 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 609 selfloop transitions, 110 changer transitions 0/724 dead transitions. [2024-06-27 21:34:55,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 724 transitions, 13160 flow [2024-06-27 21:34:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 21:34:55,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-27 21:34:55,476 INFO L175 Difference]: Start difference. First operand has 487 places, 681 transitions, 11009 flow. Second operand 8 states and 166 transitions. [2024-06-27 21:34:55,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 724 transitions, 13160 flow [2024-06-27 21:35:00,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 724 transitions, 12941 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:00,948 INFO L231 Difference]: Finished difference. Result has 489 places, 690 transitions, 11319 flow [2024-06-27 21:35:00,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10790, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11319, PETRI_PLACES=489, PETRI_TRANSITIONS=690} [2024-06-27 21:35:00,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-27 21:35:00,949 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 690 transitions, 11319 flow [2024-06-27 21:35:00,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:00,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:00,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:00,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 21:35:00,949 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:00,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:00,950 INFO L85 PathProgramCache]: Analyzing trace with hash -510558017, now seen corresponding path program 21 times [2024-06-27 21:35:00,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:00,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828318281] [2024-06-27 21:35:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:00,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:01,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:01,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828318281] [2024-06-27 21:35:01,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828318281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:01,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:01,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:01,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584047841] [2024-06-27 21:35:01,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:01,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:01,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:01,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:01,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:01,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:01,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 690 transitions, 11319 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:01,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:01,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:01,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:03,738 INFO L124 PetriNetUnfolderBase]: 4575/7308 cut-off events. [2024-06-27 21:35:03,738 INFO L125 PetriNetUnfolderBase]: For 1322716/1322716 co-relation queries the response was YES. [2024-06-27 21:35:03,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75043 conditions, 7308 events. 4575/7308 cut-off events. For 1322716/1322716 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 47482 event pairs, 845 based on Foata normal form. 4/7309 useless extension candidates. Maximal degree in co-relation 74820. Up to 6649 conditions per place. [2024-06-27 21:35:03,884 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 615 selfloop transitions, 103 changer transitions 0/723 dead transitions. [2024-06-27 21:35:03,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 723 transitions, 12988 flow [2024-06-27 21:35:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 21:35:03,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-27 21:35:03,884 INFO L175 Difference]: Start difference. First operand has 489 places, 690 transitions, 11319 flow. Second operand 8 states and 166 transitions. [2024-06-27 21:35:03,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 723 transitions, 12988 flow [2024-06-27 21:35:11,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 723 transitions, 12754 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:11,019 INFO L231 Difference]: Finished difference. Result has 492 places, 690 transitions, 11309 flow [2024-06-27 21:35:11,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11085, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11309, PETRI_PLACES=492, PETRI_TRANSITIONS=690} [2024-06-27 21:35:11,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-27 21:35:11,019 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 690 transitions, 11309 flow [2024-06-27 21:35:11,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:11,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:11,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:11,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 21:35:11,020 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:11,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:11,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1110663569, now seen corresponding path program 22 times [2024-06-27 21:35:11,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:11,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024589789] [2024-06-27 21:35:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:11,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:11,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:11,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024589789] [2024-06-27 21:35:11,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024589789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:11,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:11,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897816194] [2024-06-27 21:35:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:11,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:11,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:11,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:11,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:11,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:11,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 690 transitions, 11309 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:11,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:11,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:11,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:13,843 INFO L124 PetriNetUnfolderBase]: 4595/7306 cut-off events. [2024-06-27 21:35:13,843 INFO L125 PetriNetUnfolderBase]: For 1325339/1325339 co-relation queries the response was YES. [2024-06-27 21:35:13,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75191 conditions, 7306 events. 4595/7306 cut-off events. For 1325339/1325339 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 47144 event pairs, 828 based on Foata normal form. 4/7307 useless extension candidates. Maximal degree in co-relation 74968. Up to 6634 conditions per place. [2024-06-27 21:35:13,990 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 614 selfloop transitions, 102 changer transitions 0/721 dead transitions. [2024-06-27 21:35:13,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 721 transitions, 13295 flow [2024-06-27 21:35:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:35:13,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-27 21:35:13,991 INFO L175 Difference]: Start difference. First operand has 492 places, 690 transitions, 11309 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:35:13,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 721 transitions, 13295 flow [2024-06-27 21:35:20,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 721 transitions, 13163 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:20,370 INFO L231 Difference]: Finished difference. Result has 495 places, 693 transitions, 11495 flow [2024-06-27 21:35:20,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11179, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11495, PETRI_PLACES=495, PETRI_TRANSITIONS=693} [2024-06-27 21:35:20,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-27 21:35:20,371 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 693 transitions, 11495 flow [2024-06-27 21:35:20,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:20,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:20,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:20,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 21:35:20,371 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:20,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:20,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1103039212, now seen corresponding path program 4 times [2024-06-27 21:35:20,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:20,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768441580] [2024-06-27 21:35:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:20,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:21,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:21,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768441580] [2024-06-27 21:35:21,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768441580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:21,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:21,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:21,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592838738] [2024-06-27 21:35:21,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:21,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:21,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:21,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:21,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:21,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:21,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 693 transitions, 11495 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:21,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:21,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:21,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:23,292 INFO L124 PetriNetUnfolderBase]: 4602/7314 cut-off events. [2024-06-27 21:35:23,292 INFO L125 PetriNetUnfolderBase]: For 1312673/1312673 co-relation queries the response was YES. [2024-06-27 21:35:23,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75323 conditions, 7314 events. 4602/7314 cut-off events. For 1312673/1312673 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 47206 event pairs, 820 based on Foata normal form. 3/7314 useless extension candidates. Maximal degree in co-relation 75100. Up to 6808 conditions per place. [2024-06-27 21:35:23,427 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 647 selfloop transitions, 64 changer transitions 0/716 dead transitions. [2024-06-27 21:35:23,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 716 transitions, 13201 flow [2024-06-27 21:35:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 21:35:23,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-27 21:35:23,428 INFO L175 Difference]: Start difference. First operand has 495 places, 693 transitions, 11495 flow. Second operand 7 states and 135 transitions. [2024-06-27 21:35:23,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 716 transitions, 13201 flow [2024-06-27 21:35:29,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 716 transitions, 12839 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-27 21:35:29,511 INFO L231 Difference]: Finished difference. Result has 494 places, 696 transitions, 11399 flow [2024-06-27 21:35:29,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11133, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11399, PETRI_PLACES=494, PETRI_TRANSITIONS=696} [2024-06-27 21:35:29,512 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-27 21:35:29,512 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 696 transitions, 11399 flow [2024-06-27 21:35:29,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:29,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:29,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:29,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 21:35:29,512 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:29,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1000625620, now seen corresponding path program 12 times [2024-06-27 21:35:29,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:29,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235444149] [2024-06-27 21:35:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:30,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:30,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235444149] [2024-06-27 21:35:30,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235444149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:30,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:30,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:30,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241208919] [2024-06-27 21:35:30,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:30,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:30,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:30,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:30,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 696 transitions, 11399 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:30,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:30,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:30,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:32,430 INFO L124 PetriNetUnfolderBase]: 4596/7323 cut-off events. [2024-06-27 21:35:32,430 INFO L125 PetriNetUnfolderBase]: For 1284040/1284040 co-relation queries the response was YES. [2024-06-27 21:35:32,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74764 conditions, 7323 events. 4596/7323 cut-off events. For 1284040/1284040 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 47467 event pairs, 866 based on Foata normal form. 2/7315 useless extension candidates. Maximal degree in co-relation 74542. Up to 6729 conditions per place. [2024-06-27 21:35:32,572 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 618 selfloop transitions, 98 changer transitions 0/721 dead transitions. [2024-06-27 21:35:32,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 721 transitions, 12986 flow [2024-06-27 21:35:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 21:35:32,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47865853658536583 [2024-06-27 21:35:32,573 INFO L175 Difference]: Start difference. First operand has 494 places, 696 transitions, 11399 flow. Second operand 8 states and 157 transitions. [2024-06-27 21:35:32,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 721 transitions, 12986 flow [2024-06-27 21:35:39,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 721 transitions, 12708 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:39,270 INFO L231 Difference]: Finished difference. Result has 496 places, 696 transitions, 11330 flow [2024-06-27 21:35:39,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11121, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11330, PETRI_PLACES=496, PETRI_TRANSITIONS=696} [2024-06-27 21:35:39,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-27 21:35:39,270 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 696 transitions, 11330 flow [2024-06-27 21:35:39,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:39,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:39,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:39,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 21:35:39,271 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:39,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:39,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1110663724, now seen corresponding path program 13 times [2024-06-27 21:35:39,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:39,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645107059] [2024-06-27 21:35:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:39,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:40,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:40,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645107059] [2024-06-27 21:35:40,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645107059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:40,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:40,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:40,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615815707] [2024-06-27 21:35:40,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:40,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:40,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:40,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 696 transitions, 11330 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:40,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:40,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:40,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:42,182 INFO L124 PetriNetUnfolderBase]: 4613/7338 cut-off events. [2024-06-27 21:35:42,182 INFO L125 PetriNetUnfolderBase]: For 1297434/1297434 co-relation queries the response was YES. [2024-06-27 21:35:42,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74794 conditions, 7338 events. 4613/7338 cut-off events. For 1297434/1297434 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 47459 event pairs, 840 based on Foata normal form. 4/7339 useless extension candidates. Maximal degree in co-relation 74572. Up to 6647 conditions per place. [2024-06-27 21:35:42,321 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 569 selfloop transitions, 158 changer transitions 0/732 dead transitions. [2024-06-27 21:35:42,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 732 transitions, 13265 flow [2024-06-27 21:35:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 21:35:42,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47865853658536583 [2024-06-27 21:35:42,322 INFO L175 Difference]: Start difference. First operand has 496 places, 696 transitions, 11330 flow. Second operand 8 states and 157 transitions. [2024-06-27 21:35:42,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 732 transitions, 13265 flow [2024-06-27 21:35:48,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 732 transitions, 13047 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:48,981 INFO L231 Difference]: Finished difference. Result has 499 places, 708 transitions, 12018 flow [2024-06-27 21:35:48,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11112, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12018, PETRI_PLACES=499, PETRI_TRANSITIONS=708} [2024-06-27 21:35:48,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-27 21:35:48,982 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 708 transitions, 12018 flow [2024-06-27 21:35:48,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:48,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:48,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:48,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 21:35:48,982 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:48,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1947668121, now seen corresponding path program 23 times [2024-06-27 21:35:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:48,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280684294] [2024-06-27 21:35:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:49,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:49,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280684294] [2024-06-27 21:35:49,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280684294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:49,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:49,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:49,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213578698] [2024-06-27 21:35:49,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:49,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:49,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:49,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:49,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 708 transitions, 12018 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:49,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:49,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:49,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:52,137 INFO L124 PetriNetUnfolderBase]: 4633/7364 cut-off events. [2024-06-27 21:35:52,137 INFO L125 PetriNetUnfolderBase]: For 1327046/1327046 co-relation queries the response was YES. [2024-06-27 21:35:52,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76421 conditions, 7364 events. 4633/7364 cut-off events. For 1327046/1327046 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 47556 event pairs, 858 based on Foata normal form. 4/7365 useless extension candidates. Maximal degree in co-relation 76197. Up to 6676 conditions per place. [2024-06-27 21:35:52,257 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 633 selfloop transitions, 98 changer transitions 0/736 dead transitions. [2024-06-27 21:35:52,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 736 transitions, 14018 flow [2024-06-27 21:35:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:35:52,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-27 21:35:52,258 INFO L175 Difference]: Start difference. First operand has 499 places, 708 transitions, 12018 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:35:52,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 736 transitions, 14018 flow [2024-06-27 21:35:58,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 736 transitions, 13634 flow, removed 149 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:58,395 INFO L231 Difference]: Finished difference. Result has 500 places, 711 transitions, 11942 flow [2024-06-27 21:35:58,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11642, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11942, PETRI_PLACES=500, PETRI_TRANSITIONS=711} [2024-06-27 21:35:58,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-27 21:35:58,396 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 711 transitions, 11942 flow [2024-06-27 21:35:58,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:58,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:58,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:58,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 21:35:58,396 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:58,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:58,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1103306339, now seen corresponding path program 24 times [2024-06-27 21:35:58,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:58,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268729645] [2024-06-27 21:35:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:58,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:58,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:58,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268729645] [2024-06-27 21:35:58,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268729645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:58,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:58,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:58,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309039261] [2024-06-27 21:35:58,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:58,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:58,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:58,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:58,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:59,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:59,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 711 transitions, 11942 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:59,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:59,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:59,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:01,252 INFO L124 PetriNetUnfolderBase]: 4621/7350 cut-off events. [2024-06-27 21:36:01,253 INFO L125 PetriNetUnfolderBase]: For 1242416/1242416 co-relation queries the response was YES. [2024-06-27 21:36:01,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75308 conditions, 7350 events. 4621/7350 cut-off events. For 1242416/1242416 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 47556 event pairs, 850 based on Foata normal form. 4/7351 useless extension candidates. Maximal degree in co-relation 75086. Up to 6924 conditions per place. [2024-06-27 21:36:01,394 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 678 selfloop transitions, 47 changer transitions 0/730 dead transitions. [2024-06-27 21:36:01,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 730 transitions, 13522 flow [2024-06-27 21:36:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:36:01,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 21:36:01,395 INFO L175 Difference]: Start difference. First operand has 500 places, 711 transitions, 11942 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:36:01,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 730 transitions, 13522 flow [2024-06-27 21:36:06,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 730 transitions, 13303 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:06,772 INFO L231 Difference]: Finished difference. Result has 503 places, 711 transitions, 11827 flow [2024-06-27 21:36:06,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11723, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11827, PETRI_PLACES=503, PETRI_TRANSITIONS=711} [2024-06-27 21:36:06,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-27 21:36:06,772 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 711 transitions, 11827 flow [2024-06-27 21:36:06,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:06,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:06,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:06,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 21:36:06,773 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:06,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash -938173679, now seen corresponding path program 25 times [2024-06-27 21:36:06,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:06,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866040906] [2024-06-27 21:36:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:06,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:07,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:07,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866040906] [2024-06-27 21:36:07,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866040906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:07,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:07,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:07,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541709327] [2024-06-27 21:36:07,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:07,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:07,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:07,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:07,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 711 transitions, 11827 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:07,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:07,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:07,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:09,612 INFO L124 PetriNetUnfolderBase]: 4641/7389 cut-off events. [2024-06-27 21:36:09,613 INFO L125 PetriNetUnfolderBase]: For 1239234/1239234 co-relation queries the response was YES. [2024-06-27 21:36:09,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75279 conditions, 7389 events. 4641/7389 cut-off events. For 1239234/1239234 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 47910 event pairs, 844 based on Foata normal form. 4/7383 useless extension candidates. Maximal degree in co-relation 75057. Up to 6399 conditions per place. [2024-06-27 21:36:09,762 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 592 selfloop transitions, 147 changer transitions 0/744 dead transitions. [2024-06-27 21:36:09,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 744 transitions, 14145 flow [2024-06-27 21:36:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 21:36:09,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969512195121951 [2024-06-27 21:36:09,763 INFO L175 Difference]: Start difference. First operand has 503 places, 711 transitions, 11827 flow. Second operand 8 states and 163 transitions. [2024-06-27 21:36:09,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 744 transitions, 14145 flow [2024-06-27 21:36:15,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 744 transitions, 13916 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 21:36:15,704 INFO L231 Difference]: Finished difference. Result has 502 places, 714 transitions, 11995 flow [2024-06-27 21:36:15,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11602, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11995, PETRI_PLACES=502, PETRI_TRANSITIONS=714} [2024-06-27 21:36:15,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-27 21:36:15,704 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 714 transitions, 11995 flow [2024-06-27 21:36:15,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:15,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:15,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:15,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 21:36:15,705 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:15,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:15,705 INFO L85 PathProgramCache]: Analyzing trace with hash -938168099, now seen corresponding path program 26 times [2024-06-27 21:36:15,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:15,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901591691] [2024-06-27 21:36:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:15,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:16,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:16,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901591691] [2024-06-27 21:36:16,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901591691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:16,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:16,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:16,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535084661] [2024-06-27 21:36:16,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:16,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:16,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:16,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:16,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 714 transitions, 11995 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:16,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:16,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:16,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:18,525 INFO L124 PetriNetUnfolderBase]: 4693/7457 cut-off events. [2024-06-27 21:36:18,525 INFO L125 PetriNetUnfolderBase]: For 1280316/1280316 co-relation queries the response was YES. [2024-06-27 21:36:18,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76999 conditions, 7457 events. 4693/7457 cut-off events. For 1280316/1280316 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 48369 event pairs, 858 based on Foata normal form. 4/7453 useless extension candidates. Maximal degree in co-relation 76777. Up to 6439 conditions per place. [2024-06-27 21:36:18,673 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 591 selfloop transitions, 150 changer transitions 0/746 dead transitions. [2024-06-27 21:36:18,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 746 transitions, 14409 flow [2024-06-27 21:36:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:36:18,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-27 21:36:18,674 INFO L175 Difference]: Start difference. First operand has 502 places, 714 transitions, 11995 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:36:18,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 746 transitions, 14409 flow [2024-06-27 21:36:24,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 746 transitions, 14032 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:24,683 INFO L231 Difference]: Finished difference. Result has 505 places, 720 transitions, 12128 flow [2024-06-27 21:36:24,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11633, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12128, PETRI_PLACES=505, PETRI_TRANSITIONS=720} [2024-06-27 21:36:24,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-27 21:36:24,684 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 720 transitions, 12128 flow [2024-06-27 21:36:24,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:24,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:24,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:24,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 21:36:24,684 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:24,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1014440925, now seen corresponding path program 27 times [2024-06-27 21:36:24,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:24,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451635463] [2024-06-27 21:36:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:24,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:25,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:25,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451635463] [2024-06-27 21:36:25,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451635463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:25,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:25,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216823477] [2024-06-27 21:36:25,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:25,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:25,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:25,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 720 transitions, 12128 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:25,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:25,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:25,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:27,636 INFO L124 PetriNetUnfolderBase]: 4681/7430 cut-off events. [2024-06-27 21:36:27,637 INFO L125 PetriNetUnfolderBase]: For 1265486/1265486 co-relation queries the response was YES. [2024-06-27 21:36:27,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76181 conditions, 7430 events. 4681/7430 cut-off events. For 1265486/1265486 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 48094 event pairs, 896 based on Foata normal form. 4/7431 useless extension candidates. Maximal degree in co-relation 75958. Up to 7006 conditions per place. [2024-06-27 21:36:27,778 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 696 selfloop transitions, 39 changer transitions 0/740 dead transitions. [2024-06-27 21:36:27,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 740 transitions, 13990 flow [2024-06-27 21:36:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:36:27,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:36:27,778 INFO L175 Difference]: Start difference. First operand has 505 places, 720 transitions, 12128 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:36:27,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 740 transitions, 13990 flow [2024-06-27 21:36:33,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 740 transitions, 13623 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:33,437 INFO L231 Difference]: Finished difference. Result has 509 places, 720 transitions, 11845 flow [2024-06-27 21:36:33,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11761, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11845, PETRI_PLACES=509, PETRI_TRANSITIONS=720} [2024-06-27 21:36:33,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-27 21:36:33,437 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 720 transitions, 11845 flow [2024-06-27 21:36:33,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:33,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:33,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:33,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 21:36:33,438 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:33,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:33,438 INFO L85 PathProgramCache]: Analyzing trace with hash 399252135, now seen corresponding path program 28 times [2024-06-27 21:36:33,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:33,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662595025] [2024-06-27 21:36:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:33,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:34,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:34,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662595025] [2024-06-27 21:36:34,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662595025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:34,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:34,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:34,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913504303] [2024-06-27 21:36:34,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:34,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:34,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:34,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:34,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:34,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:34,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 720 transitions, 11845 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:34,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:34,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:34,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:36,563 INFO L124 PetriNetUnfolderBase]: 4711/7478 cut-off events. [2024-06-27 21:36:36,563 INFO L125 PetriNetUnfolderBase]: For 1279042/1279042 co-relation queries the response was YES. [2024-06-27 21:36:36,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76096 conditions, 7478 events. 4711/7478 cut-off events. For 1279042/1279042 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 48476 event pairs, 894 based on Foata normal form. 4/7479 useless extension candidates. Maximal degree in co-relation 75872. Up to 7028 conditions per place. [2024-06-27 21:36:36,697 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 700 selfloop transitions, 46 changer transitions 0/751 dead transitions. [2024-06-27 21:36:36,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 751 transitions, 13952 flow [2024-06-27 21:36:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:36:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:36:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 21:36:36,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:36:36,699 INFO L175 Difference]: Start difference. First operand has 509 places, 720 transitions, 11845 flow. Second operand 10 states and 180 transitions. [2024-06-27 21:36:36,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 751 transitions, 13952 flow [2024-06-27 21:36:43,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 751 transitions, 13633 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 21:36:43,424 INFO L231 Difference]: Finished difference. Result has 511 places, 726 transitions, 11793 flow [2024-06-27 21:36:43,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11563, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11793, PETRI_PLACES=511, PETRI_TRANSITIONS=726} [2024-06-27 21:36:43,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-27 21:36:43,425 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 726 transitions, 11793 flow [2024-06-27 21:36:43,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:43,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:43,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:43,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 21:36:43,425 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:43,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:43,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1008913005, now seen corresponding path program 29 times [2024-06-27 21:36:43,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:43,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830426422] [2024-06-27 21:36:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:43,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:44,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830426422] [2024-06-27 21:36:44,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830426422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:44,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:44,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:44,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053504955] [2024-06-27 21:36:44,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:44,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:44,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:44,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:44,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 726 transitions, 11793 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:44,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:44,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:44,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:46,293 INFO L124 PetriNetUnfolderBase]: 4699/7458 cut-off events. [2024-06-27 21:36:46,294 INFO L125 PetriNetUnfolderBase]: For 1259631/1259631 co-relation queries the response was YES. [2024-06-27 21:36:46,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75129 conditions, 7458 events. 4699/7458 cut-off events. For 1259631/1259631 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 48338 event pairs, 902 based on Foata normal form. 4/7459 useless extension candidates. Maximal degree in co-relation 74905. Up to 7072 conditions per place. [2024-06-27 21:36:46,437 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 703 selfloop transitions, 39 changer transitions 0/747 dead transitions. [2024-06-27 21:36:46,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 747 transitions, 13389 flow [2024-06-27 21:36:46,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:36:46,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:36:46,438 INFO L175 Difference]: Start difference. First operand has 511 places, 726 transitions, 11793 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:36:46,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 747 transitions, 13389 flow [2024-06-27 21:36:53,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 747 transitions, 13169 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:53,431 INFO L231 Difference]: Finished difference. Result has 512 places, 726 transitions, 11657 flow [2024-06-27 21:36:53,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11573, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11657, PETRI_PLACES=512, PETRI_TRANSITIONS=726} [2024-06-27 21:36:53,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-27 21:36:53,431 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 726 transitions, 11657 flow [2024-06-27 21:36:53,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:53,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:53,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:53,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 21:36:53,431 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:53,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:53,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1000864630, now seen corresponding path program 14 times [2024-06-27 21:36:53,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:53,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446481457] [2024-06-27 21:36:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:53,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:54,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:54,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446481457] [2024-06-27 21:36:54,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446481457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:54,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:54,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:54,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644902094] [2024-06-27 21:36:54,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:54,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:54,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:54,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:54,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:54,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 726 transitions, 11657 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:54,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:54,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:54,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:56,516 INFO L124 PetriNetUnfolderBase]: 4696/7477 cut-off events. [2024-06-27 21:36:56,517 INFO L125 PetriNetUnfolderBase]: For 1237240/1237240 co-relation queries the response was YES. [2024-06-27 21:36:56,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74733 conditions, 7477 events. 4696/7477 cut-off events. For 1237240/1237240 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 48589 event pairs, 888 based on Foata normal form. 1/7470 useless extension candidates. Maximal degree in co-relation 74508. Up to 6938 conditions per place. [2024-06-27 21:36:56,667 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 664 selfloop transitions, 99 changer transitions 0/768 dead transitions. [2024-06-27 21:36:56,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 768 transitions, 13586 flow [2024-06-27 21:36:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:36:56,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:36:56,668 INFO L175 Difference]: Start difference. First operand has 512 places, 726 transitions, 11657 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:36:56,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 768 transitions, 13586 flow [2024-06-27 21:37:03,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 768 transitions, 13508 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:03,746 INFO L231 Difference]: Finished difference. Result has 519 places, 742 transitions, 12198 flow [2024-06-27 21:37:03,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11579, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12198, PETRI_PLACES=519, PETRI_TRANSITIONS=742} [2024-06-27 21:37:03,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-27 21:37:03,747 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 742 transitions, 12198 flow [2024-06-27 21:37:03,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:03,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:03,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:03,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 21:37:03,747 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:03,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1008899985, now seen corresponding path program 30 times [2024-06-27 21:37:03,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:03,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943075946] [2024-06-27 21:37:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:03,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:04,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:04,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943075946] [2024-06-27 21:37:04,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943075946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:04,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:04,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:04,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42699004] [2024-06-27 21:37:04,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:04,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:04,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:04,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:04,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:04,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:37:04,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 742 transitions, 12198 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:04,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:04,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:37:04,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:06,862 INFO L124 PetriNetUnfolderBase]: 4684/7441 cut-off events. [2024-06-27 21:37:06,862 INFO L125 PetriNetUnfolderBase]: For 1252528/1252528 co-relation queries the response was YES. [2024-06-27 21:37:06,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74769 conditions, 7441 events. 4684/7441 cut-off events. For 1252528/1252528 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 48231 event pairs, 804 based on Foata normal form. 4/7437 useless extension candidates. Maximal degree in co-relation 74540. Up to 6433 conditions per place. [2024-06-27 21:37:06,986 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 587 selfloop transitions, 177 changer transitions 0/769 dead transitions. [2024-06-27 21:37:06,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 769 transitions, 13966 flow [2024-06-27 21:37:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 21:37:06,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 21:37:06,987 INFO L175 Difference]: Start difference. First operand has 519 places, 742 transitions, 12198 flow. Second operand 8 states and 160 transitions. [2024-06-27 21:37:06,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 769 transitions, 13966 flow [2024-06-27 21:37:12,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 769 transitions, 13656 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:12,833 INFO L231 Difference]: Finished difference. Result has 523 places, 742 transitions, 12257 flow [2024-06-27 21:37:12,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11896, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12257, PETRI_PLACES=523, PETRI_TRANSITIONS=742} [2024-06-27 21:37:12,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-27 21:37:12,834 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 742 transitions, 12257 flow [2024-06-27 21:37:12,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:12,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:12,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:12,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 21:37:12,834 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:12,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash -287092002, now seen corresponding path program 15 times [2024-06-27 21:37:12,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:12,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416326085] [2024-06-27 21:37:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:12,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:13,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:13,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416326085] [2024-06-27 21:37:13,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416326085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:13,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:13,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:13,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051923501] [2024-06-27 21:37:13,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:13,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:13,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:13,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:37:13,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 742 transitions, 12257 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:13,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:13,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:37:13,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:15,982 INFO L124 PetriNetUnfolderBase]: 4713/7491 cut-off events. [2024-06-27 21:37:15,982 INFO L125 PetriNetUnfolderBase]: For 1228435/1228435 co-relation queries the response was YES. [2024-06-27 21:37:16,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75307 conditions, 7491 events. 4713/7491 cut-off events. For 1228435/1228435 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 48505 event pairs, 870 based on Foata normal form. 1/7489 useless extension candidates. Maximal degree in co-relation 75076. Up to 7098 conditions per place. [2024-06-27 21:37:16,124 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 723 selfloop transitions, 55 changer transitions 0/783 dead transitions. [2024-06-27 21:37:16,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 783 transitions, 14279 flow [2024-06-27 21:37:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:37:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:37:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 21:37:16,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317073170731707 [2024-06-27 21:37:16,125 INFO L175 Difference]: Start difference. First operand has 523 places, 742 transitions, 12257 flow. Second operand 10 states and 177 transitions. [2024-06-27 21:37:16,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 783 transitions, 14279 flow [2024-06-27 21:37:22,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 783 transitions, 13477 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-27 21:37:22,932 INFO L231 Difference]: Finished difference. Result has 527 places, 760 transitions, 12027 flow [2024-06-27 21:37:22,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11473, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12027, PETRI_PLACES=527, PETRI_TRANSITIONS=760} [2024-06-27 21:37:22,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-27 21:37:22,933 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 760 transitions, 12027 flow [2024-06-27 21:37:22,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:22,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:22,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:22,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 21:37:22,933 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:22,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:22,933 INFO L85 PathProgramCache]: Analyzing trace with hash -922750503, now seen corresponding path program 1 times [2024-06-27 21:37:22,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:22,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949016789] [2024-06-27 21:37:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:22,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:23,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:23,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949016789] [2024-06-27 21:37:23,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949016789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:23,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:23,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:37:23,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457827746] [2024-06-27 21:37:23,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:23,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:37:23,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:23,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:37:23,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:37:23,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:37:23,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 760 transitions, 12027 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:23,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:23,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:37:23,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:26,042 INFO L124 PetriNetUnfolderBase]: 4721/7487 cut-off events. [2024-06-27 21:37:26,043 INFO L125 PetriNetUnfolderBase]: For 1236388/1236388 co-relation queries the response was YES. [2024-06-27 21:37:26,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74109 conditions, 7487 events. 4721/7487 cut-off events. For 1236388/1236388 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 48399 event pairs, 865 based on Foata normal form. 2/7486 useless extension candidates. Maximal degree in co-relation 73875. Up to 7123 conditions per place. [2024-06-27 21:37:26,187 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 740 selfloop transitions, 38 changer transitions 0/783 dead transitions. [2024-06-27 21:37:26,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 783 transitions, 13719 flow [2024-06-27 21:37:26,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:37:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:37:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 21:37:26,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41019955654101997 [2024-06-27 21:37:26,188 INFO L175 Difference]: Start difference. First operand has 527 places, 760 transitions, 12027 flow. Second operand 11 states and 185 transitions. [2024-06-27 21:37:26,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 783 transitions, 13719 flow [2024-06-27 21:37:32,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 783 transitions, 13651 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:32,154 INFO L231 Difference]: Finished difference. Result has 534 places, 762 transitions, 12108 flow [2024-06-27 21:37:32,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11959, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12108, PETRI_PLACES=534, PETRI_TRANSITIONS=762} [2024-06-27 21:37:32,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-27 21:37:32,154 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 762 transitions, 12108 flow [2024-06-27 21:37:32,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:32,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:32,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:32,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 21:37:32,155 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:32,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash 970285829, now seen corresponding path program 2 times [2024-06-27 21:37:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:32,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476931570] [2024-06-27 21:37:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:32,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:33,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:33,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476931570] [2024-06-27 21:37:33,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476931570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:33,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:33,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:37:33,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457080106] [2024-06-27 21:37:33,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:33,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:37:33,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:33,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:37:33,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:37:33,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:37:33,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 762 transitions, 12108 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:33,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:33,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:37:33,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:35,674 INFO L124 PetriNetUnfolderBase]: 4742/7516 cut-off events. [2024-06-27 21:37:35,674 INFO L125 PetriNetUnfolderBase]: For 1273819/1273819 co-relation queries the response was YES. [2024-06-27 21:37:35,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74924 conditions, 7516 events. 4742/7516 cut-off events. For 1273819/1273819 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 48663 event pairs, 862 based on Foata normal form. 2/7515 useless extension candidates. Maximal degree in co-relation 74690. Up to 7131 conditions per place. [2024-06-27 21:37:35,807 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 739 selfloop transitions, 44 changer transitions 0/788 dead transitions. [2024-06-27 21:37:35,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 788 transitions, 14144 flow [2024-06-27 21:37:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:37:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:37:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-27 21:37:35,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124168514412417 [2024-06-27 21:37:35,808 INFO L175 Difference]: Start difference. First operand has 534 places, 762 transitions, 12108 flow. Second operand 11 states and 186 transitions. [2024-06-27 21:37:35,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 788 transitions, 14144 flow [2024-06-27 21:37:41,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 788 transitions, 14013 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 21:37:41,428 INFO L231 Difference]: Finished difference. Result has 537 places, 766 transitions, 12219 flow [2024-06-27 21:37:41,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11977, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12219, PETRI_PLACES=537, PETRI_TRANSITIONS=766} [2024-06-27 21:37:41,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 495 predicate places. [2024-06-27 21:37:41,428 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 766 transitions, 12219 flow [2024-06-27 21:37:41,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:41,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:41,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:41,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 21:37:41,429 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:41,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash -928112883, now seen corresponding path program 3 times [2024-06-27 21:37:41,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:41,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296196353] [2024-06-27 21:37:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:41,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:42,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:42,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296196353] [2024-06-27 21:37:42,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296196353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:42,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:42,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:37:42,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204982373] [2024-06-27 21:37:42,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:42,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:37:42,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:37:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:37:42,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:37:42,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 766 transitions, 12219 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:42,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:42,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:37:42,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:44,579 INFO L124 PetriNetUnfolderBase]: 4737/7509 cut-off events. [2024-06-27 21:37:44,579 INFO L125 PetriNetUnfolderBase]: For 1271981/1271981 co-relation queries the response was YES. [2024-06-27 21:37:44,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74760 conditions, 7509 events. 4737/7509 cut-off events. For 1271981/1271981 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 48505 event pairs, 861 based on Foata normal form. 2/7508 useless extension candidates. Maximal degree in co-relation 74524. Up to 7147 conditions per place. [2024-06-27 21:37:44,728 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 743 selfloop transitions, 37 changer transitions 0/785 dead transitions. [2024-06-27 21:37:44,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 785 transitions, 13847 flow [2024-06-27 21:37:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:37:44,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:37:44,729 INFO L175 Difference]: Start difference. First operand has 537 places, 766 transitions, 12219 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:37:44,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 785 transitions, 13847 flow [2024-06-27 21:37:50,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 785 transitions, 13696 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:50,531 INFO L231 Difference]: Finished difference. Result has 540 places, 766 transitions, 12147 flow [2024-06-27 21:37:50,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12068, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12147, PETRI_PLACES=540, PETRI_TRANSITIONS=766} [2024-06-27 21:37:50,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-27 21:37:50,532 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 766 transitions, 12147 flow [2024-06-27 21:37:50,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:50,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:50,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:50,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 21:37:50,532 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:50,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:50,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1014925517, now seen corresponding path program 4 times [2024-06-27 21:37:50,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:50,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087229655] [2024-06-27 21:37:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:50,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:51,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:51,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087229655] [2024-06-27 21:37:51,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087229655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:51,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:51,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:37:51,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099781600] [2024-06-27 21:37:51,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:51,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:37:51,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:51,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:37:51,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:37:51,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:37:51,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 766 transitions, 12147 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:51,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:51,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:37:51,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:53,828 INFO L124 PetriNetUnfolderBase]: 4745/7529 cut-off events. [2024-06-27 21:37:53,829 INFO L125 PetriNetUnfolderBase]: For 1290073/1290073 co-relation queries the response was YES. [2024-06-27 21:37:53,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74911 conditions, 7529 events. 4745/7529 cut-off events. For 1290073/1290073 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 48796 event pairs, 903 based on Foata normal form. 2/7528 useless extension candidates. Maximal degree in co-relation 74673. Up to 7151 conditions per place. [2024-06-27 21:37:53,974 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 744 selfloop transitions, 36 changer transitions 0/785 dead transitions. [2024-06-27 21:37:53,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 785 transitions, 13839 flow [2024-06-27 21:37:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:37:53,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:37:53,976 INFO L175 Difference]: Start difference. First operand has 540 places, 766 transitions, 12147 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:37:53,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 785 transitions, 13839 flow [2024-06-27 21:38:00,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 785 transitions, 13755 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:38:00,453 INFO L231 Difference]: Finished difference. Result has 540 places, 768 transitions, 12216 flow [2024-06-27 21:38:00,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12063, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12216, PETRI_PLACES=540, PETRI_TRANSITIONS=768} [2024-06-27 21:38:00,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-27 21:38:00,454 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 768 transitions, 12216 flow [2024-06-27 21:38:00,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:00,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:00,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:00,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 21:38:00,454 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:00,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1014932957, now seen corresponding path program 5 times [2024-06-27 21:38:00,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:00,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268936243] [2024-06-27 21:38:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:00,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268936243] [2024-06-27 21:38:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268936243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:01,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:01,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:38:01,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517139514] [2024-06-27 21:38:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:38:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:01,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:38:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:38:01,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:38:01,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 768 transitions, 12216 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:01,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:01,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:38:01,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:03,612 INFO L124 PetriNetUnfolderBase]: 4766/7560 cut-off events. [2024-06-27 21:38:03,612 INFO L125 PetriNetUnfolderBase]: For 1328391/1328391 co-relation queries the response was YES. [2024-06-27 21:38:03,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75805 conditions, 7560 events. 4766/7560 cut-off events. For 1328391/1328391 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49014 event pairs, 906 based on Foata normal form. 2/7559 useless extension candidates. Maximal degree in co-relation 75566. Up to 7159 conditions per place. [2024-06-27 21:38:03,766 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 744 selfloop transitions, 41 changer transitions 0/790 dead transitions. [2024-06-27 21:38:03,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 790 transitions, 14264 flow [2024-06-27 21:38:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:38:03,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:38:03,767 INFO L175 Difference]: Start difference. First operand has 540 places, 768 transitions, 12216 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:38:03,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 790 transitions, 14264 flow [2024-06-27 21:38:10,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 790 transitions, 14147 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:10,857 INFO L231 Difference]: Finished difference. Result has 544 places, 772 transitions, 12349 flow [2024-06-27 21:38:10,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12099, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12349, PETRI_PLACES=544, PETRI_TRANSITIONS=772} [2024-06-27 21:38:10,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-27 21:38:10,858 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 772 transitions, 12349 flow [2024-06-27 21:38:10,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:10,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:10,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:10,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 21:38:10,858 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:10,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:10,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1009361327, now seen corresponding path program 6 times [2024-06-27 21:38:10,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:10,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156114999] [2024-06-27 21:38:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:10,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:11,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:11,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156114999] [2024-06-27 21:38:11,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156114999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:11,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:11,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:38:11,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012852184] [2024-06-27 21:38:11,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:11,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:38:11,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:11,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:38:11,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:38:11,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:38:11,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 772 transitions, 12349 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:11,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:11,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:38:11,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:14,220 INFO L124 PetriNetUnfolderBase]: 4761/7555 cut-off events. [2024-06-27 21:38:14,220 INFO L125 PetriNetUnfolderBase]: For 1326737/1326737 co-relation queries the response was YES. [2024-06-27 21:38:14,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75618 conditions, 7555 events. 4761/7555 cut-off events. For 1326737/1326737 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49002 event pairs, 903 based on Foata normal form. 2/7554 useless extension candidates. Maximal degree in co-relation 75377. Up to 7175 conditions per place. [2024-06-27 21:38:14,368 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 749 selfloop transitions, 38 changer transitions 0/792 dead transitions. [2024-06-27 21:38:14,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 792 transitions, 13995 flow [2024-06-27 21:38:14,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:14,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:38:14,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 21:38:14,369 INFO L175 Difference]: Start difference. First operand has 544 places, 772 transitions, 12349 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:38:14,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 792 transitions, 13995 flow [2024-06-27 21:38:21,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 792 transitions, 13815 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:21,414 INFO L231 Difference]: Finished difference. Result has 547 places, 772 transitions, 12250 flow [2024-06-27 21:38:21,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12169, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12250, PETRI_PLACES=547, PETRI_TRANSITIONS=772} [2024-06-27 21:38:21,414 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 505 predicate places. [2024-06-27 21:38:21,414 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 772 transitions, 12250 flow [2024-06-27 21:38:21,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:21,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:21,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:21,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 21:38:21,415 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:21,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:21,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1432523381, now seen corresponding path program 7 times [2024-06-27 21:38:21,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:21,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448177323] [2024-06-27 21:38:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:21,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:22,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:22,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448177323] [2024-06-27 21:38:22,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448177323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:22,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:22,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:38:22,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209894167] [2024-06-27 21:38:22,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:22,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:38:22,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:22,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:38:22,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:38:22,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:38:22,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 772 transitions, 12250 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:22,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:22,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:38:22,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:24,485 INFO L124 PetriNetUnfolderBase]: 4769/7589 cut-off events. [2024-06-27 21:38:24,485 INFO L125 PetriNetUnfolderBase]: For 1341579/1341579 co-relation queries the response was YES. [2024-06-27 21:38:24,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75753 conditions, 7589 events. 4769/7589 cut-off events. For 1341579/1341579 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 49362 event pairs, 910 based on Foata normal form. 2/7588 useless extension candidates. Maximal degree in co-relation 75511. Up to 7226 conditions per place. [2024-06-27 21:38:24,638 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 763 selfloop transitions, 18 changer transitions 0/786 dead transitions. [2024-06-27 21:38:24,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 786 transitions, 13920 flow [2024-06-27 21:38:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:38:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:38:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:38:24,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-27 21:38:24,639 INFO L175 Difference]: Start difference. First operand has 547 places, 772 transitions, 12250 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:38:24,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 786 transitions, 13920 flow [2024-06-27 21:38:32,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 786 transitions, 13843 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:32,511 INFO L231 Difference]: Finished difference. Result has 548 places, 774 transitions, 12294 flow [2024-06-27 21:38:32,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12173, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12294, PETRI_PLACES=548, PETRI_TRANSITIONS=774} [2024-06-27 21:38:32,512 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-27 21:38:32,512 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 774 transitions, 12294 flow [2024-06-27 21:38:32,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:32,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:32,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:32,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 21:38:32,512 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:32,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:32,513 INFO L85 PathProgramCache]: Analyzing trace with hash -253565475, now seen corresponding path program 8 times [2024-06-27 21:38:32,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:32,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590021550] [2024-06-27 21:38:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:32,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:33,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:33,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590021550] [2024-06-27 21:38:33,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590021550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:33,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:33,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:38:33,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484029465] [2024-06-27 21:38:33,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:33,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:38:33,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:33,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:38:33,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:38:33,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:38:33,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 774 transitions, 12294 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:33,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:33,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:38:33,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:35,874 INFO L124 PetriNetUnfolderBase]: 4777/7583 cut-off events. [2024-06-27 21:38:35,874 INFO L125 PetriNetUnfolderBase]: For 1360681/1360681 co-relation queries the response was YES. [2024-06-27 21:38:35,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76062 conditions, 7583 events. 4777/7583 cut-off events. For 1360681/1360681 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 49209 event pairs, 906 based on Foata normal form. 2/7582 useless extension candidates. Maximal degree in co-relation 75819. Up to 7136 conditions per place. [2024-06-27 21:38:36,028 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 737 selfloop transitions, 53 changer transitions 0/795 dead transitions. [2024-06-27 21:38:36,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 795 transitions, 14394 flow [2024-06-27 21:38:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:38:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:38:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:38:36,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 21:38:36,029 INFO L175 Difference]: Start difference. First operand has 548 places, 774 transitions, 12294 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:38:36,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 795 transitions, 14394 flow [2024-06-27 21:38:43,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 795 transitions, 14289 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:43,589 INFO L231 Difference]: Finished difference. Result has 551 places, 779 transitions, 12519 flow [2024-06-27 21:38:43,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12189, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12519, PETRI_PLACES=551, PETRI_TRANSITIONS=779} [2024-06-27 21:38:43,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-27 21:38:43,589 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 779 transitions, 12519 flow [2024-06-27 21:38:43,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:43,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:43,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:43,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 21:38:43,590 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:43,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:43,590 INFO L85 PathProgramCache]: Analyzing trace with hash -253572915, now seen corresponding path program 9 times [2024-06-27 21:38:43,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:43,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690897083] [2024-06-27 21:38:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:43,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:44,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:44,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690897083] [2024-06-27 21:38:44,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690897083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:44,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:44,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:38:44,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703170997] [2024-06-27 21:38:44,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:44,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:38:44,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:44,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:38:44,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:38:44,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:38:44,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 779 transitions, 12519 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:44,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:44,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:38:44,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:46,669 INFO L124 PetriNetUnfolderBase]: 4767/7563 cut-off events. [2024-06-27 21:38:46,670 INFO L125 PetriNetUnfolderBase]: For 1358181/1358181 co-relation queries the response was YES. [2024-06-27 21:38:46,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75569 conditions, 7563 events. 4767/7563 cut-off events. For 1358181/1358181 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49057 event pairs, 904 based on Foata normal form. 4/7564 useless extension candidates. Maximal degree in co-relation 75324. Up to 7158 conditions per place. [2024-06-27 21:38:46,827 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 742 selfloop transitions, 50 changer transitions 0/797 dead transitions. [2024-06-27 21:38:46,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 797 transitions, 14167 flow [2024-06-27 21:38:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:38:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:38:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:38:46,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:38:46,827 INFO L175 Difference]: Start difference. First operand has 551 places, 779 transitions, 12519 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:38:46,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 797 transitions, 14167 flow [2024-06-27 21:38:54,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 797 transitions, 13956 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-27 21:38:54,476 INFO L231 Difference]: Finished difference. Result has 555 places, 779 transitions, 12421 flow [2024-06-27 21:38:54,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12308, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12421, PETRI_PLACES=555, PETRI_TRANSITIONS=779} [2024-06-27 21:38:54,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2024-06-27 21:38:54,476 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 779 transitions, 12421 flow [2024-06-27 21:38:54,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:54,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:54,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:54,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 21:38:54,477 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:54,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash -791439201, now seen corresponding path program 1 times [2024-06-27 21:38:54,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:54,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612265424] [2024-06-27 21:38:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:54,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:55,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:55,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612265424] [2024-06-27 21:38:55,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612265424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:55,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:55,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:55,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976716435] [2024-06-27 21:38:55,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:55,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:55,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:55,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:38:55,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 779 transitions, 12421 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:55,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:55,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:38:55,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:58,074 INFO L124 PetriNetUnfolderBase]: 4772/7594 cut-off events. [2024-06-27 21:38:58,074 INFO L125 PetriNetUnfolderBase]: For 1337779/1337779 co-relation queries the response was YES. [2024-06-27 21:38:58,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75543 conditions, 7594 events. 4772/7594 cut-off events. For 1337779/1337779 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 49403 event pairs, 858 based on Foata normal form. 1/7592 useless extension candidates. Maximal degree in co-relation 75296. Up to 7037 conditions per place. [2024-06-27 21:38:58,209 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 713 selfloop transitions, 95 changer transitions 0/813 dead transitions. [2024-06-27 21:38:58,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 813 transitions, 14699 flow [2024-06-27 21:38:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:38:58,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 21:38:58,210 INFO L175 Difference]: Start difference. First operand has 555 places, 779 transitions, 12421 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:38:58,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 813 transitions, 14699 flow [2024-06-27 21:39:06,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 813 transitions, 14601 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:06,384 INFO L231 Difference]: Finished difference. Result has 558 places, 785 transitions, 12820 flow [2024-06-27 21:39:06,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12325, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12820, PETRI_PLACES=558, PETRI_TRANSITIONS=785} [2024-06-27 21:39:06,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 516 predicate places. [2024-06-27 21:39:06,384 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 785 transitions, 12820 flow [2024-06-27 21:39:06,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:06,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:06,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:06,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 21:39:06,385 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:06,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash -791319045, now seen corresponding path program 1 times [2024-06-27 21:39:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:06,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647039672] [2024-06-27 21:39:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:06,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:07,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:07,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647039672] [2024-06-27 21:39:07,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647039672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:07,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:07,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:07,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435511016] [2024-06-27 21:39:07,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:07,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:07,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:07,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:07,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:07,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:39:07,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 785 transitions, 12820 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:07,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:07,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:39:07,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:09,775 INFO L124 PetriNetUnfolderBase]: 4797/7631 cut-off events. [2024-06-27 21:39:09,776 INFO L125 PetriNetUnfolderBase]: For 1359728/1359728 co-relation queries the response was YES. [2024-06-27 21:39:09,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76408 conditions, 7631 events. 4797/7631 cut-off events. For 1359728/1359728 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 49719 event pairs, 858 based on Foata normal form. 2/7630 useless extension candidates. Maximal degree in co-relation 76161. Up to 7073 conditions per place. [2024-06-27 21:39:10,019 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 731 selfloop transitions, 98 changer transitions 0/834 dead transitions. [2024-06-27 21:39:10,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 834 transitions, 15309 flow [2024-06-27 21:39:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:10,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 21:39:10,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-27 21:39:10,020 INFO L175 Difference]: Start difference. First operand has 558 places, 785 transitions, 12820 flow. Second operand 9 states and 172 transitions. [2024-06-27 21:39:10,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 834 transitions, 15309 flow [2024-06-27 21:39:18,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 834 transitions, 14980 flow, removed 121 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:18,626 INFO L231 Difference]: Finished difference. Result has 564 places, 807 transitions, 13268 flow [2024-06-27 21:39:18,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12491, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13268, PETRI_PLACES=564, PETRI_TRANSITIONS=807} [2024-06-27 21:39:18,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 522 predicate places. [2024-06-27 21:39:18,627 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 807 transitions, 13268 flow [2024-06-27 21:39:18,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:18,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:18,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:18,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 21:39:18,627 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:18,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:18,627 INFO L85 PathProgramCache]: Analyzing trace with hash -791319231, now seen corresponding path program 2 times [2024-06-27 21:39:18,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:18,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520344716] [2024-06-27 21:39:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:18,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:19,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:19,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520344716] [2024-06-27 21:39:19,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520344716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:19,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:19,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:19,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392014661] [2024-06-27 21:39:19,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:19,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:19,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:19,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:19,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:19,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:39:19,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 807 transitions, 13268 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:19,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:19,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:39:19,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:22,318 INFO L124 PetriNetUnfolderBase]: 4794/7627 cut-off events. [2024-06-27 21:39:22,318 INFO L125 PetriNetUnfolderBase]: For 1364307/1364307 co-relation queries the response was YES. [2024-06-27 21:39:22,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77181 conditions, 7627 events. 4794/7627 cut-off events. For 1364307/1364307 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 49633 event pairs, 857 based on Foata normal form. 1/7625 useless extension candidates. Maximal degree in co-relation 76930. Up to 7130 conditions per place. [2024-06-27 21:39:22,464 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 750 selfloop transitions, 76 changer transitions 0/831 dead transitions. [2024-06-27 21:39:22,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 831 transitions, 14998 flow [2024-06-27 21:39:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:39:22,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 21:39:22,465 INFO L175 Difference]: Start difference. First operand has 564 places, 807 transitions, 13268 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:39:22,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 831 transitions, 14998 flow [2024-06-27 21:39:30,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 831 transitions, 14587 flow, removed 152 selfloop flow, removed 4 redundant places. [2024-06-27 21:39:30,931 INFO L231 Difference]: Finished difference. Result has 569 places, 807 transitions, 13015 flow [2024-06-27 21:39:30,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12857, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13015, PETRI_PLACES=569, PETRI_TRANSITIONS=807} [2024-06-27 21:39:30,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 527 predicate places. [2024-06-27 21:39:30,931 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 807 transitions, 13015 flow [2024-06-27 21:39:30,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:30,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:30,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:30,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 21:39:30,932 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:30,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash -786677415, now seen corresponding path program 2 times [2024-06-27 21:39:30,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:30,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6627191] [2024-06-27 21:39:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:30,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:31,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6627191] [2024-06-27 21:39:31,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6627191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:31,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:31,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:31,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285495359] [2024-06-27 21:39:31,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:31,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:31,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:31,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:31,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:31,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:39:31,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 807 transitions, 13015 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:31,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:31,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:39:31,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:34,511 INFO L124 PetriNetUnfolderBase]: 4829/7678 cut-off events. [2024-06-27 21:39:34,511 INFO L125 PetriNetUnfolderBase]: For 1387333/1387333 co-relation queries the response was YES. [2024-06-27 21:39:34,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77336 conditions, 7678 events. 4829/7678 cut-off events. For 1387333/1387333 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 50021 event pairs, 866 based on Foata normal form. 2/7677 useless extension candidates. Maximal degree in co-relation 77084. Up to 7195 conditions per place. [2024-06-27 21:39:34,666 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 762 selfloop transitions, 78 changer transitions 0/845 dead transitions. [2024-06-27 21:39:34,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 845 transitions, 15049 flow [2024-06-27 21:39:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:39:34,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:39:34,667 INFO L175 Difference]: Start difference. First operand has 569 places, 807 transitions, 13015 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:39:34,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 845 transitions, 15049 flow [2024-06-27 21:39:42,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 845 transitions, 14794 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 21:39:42,706 INFO L231 Difference]: Finished difference. Result has 571 places, 821 transitions, 13206 flow [2024-06-27 21:39:42,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12776, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13206, PETRI_PLACES=571, PETRI_TRANSITIONS=821} [2024-06-27 21:39:42,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 529 predicate places. [2024-06-27 21:39:42,707 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 821 transitions, 13206 flow [2024-06-27 21:39:42,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:42,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:42,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:42,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 21:39:42,707 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:42,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:42,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1220456715, now seen corresponding path program 3 times [2024-06-27 21:39:42,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:42,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494958601] [2024-06-27 21:39:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:42,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:43,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:43,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494958601] [2024-06-27 21:39:43,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494958601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:43,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:43,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:43,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023351398] [2024-06-27 21:39:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:43,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:43,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:43,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:39:43,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 821 transitions, 13206 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:43,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:43,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:39:43,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:46,387 INFO L124 PetriNetUnfolderBase]: 4849/7694 cut-off events. [2024-06-27 21:39:46,387 INFO L125 PetriNetUnfolderBase]: For 1404149/1404149 co-relation queries the response was YES. [2024-06-27 21:39:46,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77711 conditions, 7694 events. 4849/7694 cut-off events. For 1404149/1404149 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 49953 event pairs, 840 based on Foata normal form. 2/7693 useless extension candidates. Maximal degree in co-relation 77457. Up to 7188 conditions per place. [2024-06-27 21:39:46,522 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 760 selfloop transitions, 87 changer transitions 0/852 dead transitions. [2024-06-27 21:39:46,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 852 transitions, 15238 flow [2024-06-27 21:39:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:39:46,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-27 21:39:46,523 INFO L175 Difference]: Start difference. First operand has 571 places, 821 transitions, 13206 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:39:46,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 852 transitions, 15238 flow [2024-06-27 21:39:54,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 852 transitions, 15020 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:54,519 INFO L231 Difference]: Finished difference. Result has 577 places, 831 transitions, 13438 flow [2024-06-27 21:39:54,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12990, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13438, PETRI_PLACES=577, PETRI_TRANSITIONS=831} [2024-06-27 21:39:54,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 535 predicate places. [2024-06-27 21:39:54,520 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 831 transitions, 13438 flow [2024-06-27 21:39:54,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:54,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:54,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:54,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 21:39:54,520 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:54,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:54,520 INFO L85 PathProgramCache]: Analyzing trace with hash -816973989, now seen corresponding path program 1 times [2024-06-27 21:39:54,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:54,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965684203] [2024-06-27 21:39:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:54,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:55,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:55,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965684203] [2024-06-27 21:39:55,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965684203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:55,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:55,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:55,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121859640] [2024-06-27 21:39:55,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:55,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:55,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:55,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:39:55,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 831 transitions, 13438 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:55,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:55,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:39:55,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:58,493 INFO L124 PetriNetUnfolderBase]: 4945/7868 cut-off events. [2024-06-27 21:39:58,493 INFO L125 PetriNetUnfolderBase]: For 1494019/1494019 co-relation queries the response was YES. [2024-06-27 21:39:58,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79168 conditions, 7868 events. 4945/7868 cut-off events. For 1494019/1494019 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 51545 event pairs, 834 based on Foata normal form. 8/7873 useless extension candidates. Maximal degree in co-relation 78911. Up to 7075 conditions per place. [2024-06-27 21:39:58,640 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 784 selfloop transitions, 90 changer transitions 0/879 dead transitions. [2024-06-27 21:39:58,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 879 transitions, 15895 flow [2024-06-27 21:39:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 21:39:58,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-27 21:39:58,641 INFO L175 Difference]: Start difference. First operand has 577 places, 831 transitions, 13438 flow. Second operand 9 states and 178 transitions. [2024-06-27 21:39:58,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 879 transitions, 15895 flow [2024-06-27 21:40:06,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 879 transitions, 15602 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:06,959 INFO L231 Difference]: Finished difference. Result has 584 places, 844 transitions, 13596 flow [2024-06-27 21:40:06,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13155, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13596, PETRI_PLACES=584, PETRI_TRANSITIONS=844} [2024-06-27 21:40:06,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 542 predicate places. [2024-06-27 21:40:06,959 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 844 transitions, 13596 flow [2024-06-27 21:40:06,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:06,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:06,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:06,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 21:40:06,960 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:06,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash -614279781, now seen corresponding path program 2 times [2024-06-27 21:40:06,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:06,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389549989] [2024-06-27 21:40:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:06,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:07,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:07,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389549989] [2024-06-27 21:40:07,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389549989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:07,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:07,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:07,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57402920] [2024-06-27 21:40:07,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:07,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:07,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:07,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:40:07,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 844 transitions, 13596 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:07,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:07,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:40:07,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:10,842 INFO L124 PetriNetUnfolderBase]: 5017/7978 cut-off events. [2024-06-27 21:40:10,842 INFO L125 PetriNetUnfolderBase]: For 1518658/1518658 co-relation queries the response was YES. [2024-06-27 21:40:10,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80488 conditions, 7978 events. 5017/7978 cut-off events. For 1518658/1518658 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 52354 event pairs, 875 based on Foata normal form. 8/7983 useless extension candidates. Maximal degree in co-relation 80228. Up to 7390 conditions per place. [2024-06-27 21:40:10,998 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 784 selfloop transitions, 90 changer transitions 0/879 dead transitions. [2024-06-27 21:40:10,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 879 transitions, 15627 flow [2024-06-27 21:40:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:40:10,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-27 21:40:10,999 INFO L175 Difference]: Start difference. First operand has 584 places, 844 transitions, 13596 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:40:10,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 879 transitions, 15627 flow Killed by 15