./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix006_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:13:45,975 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:13:46,047 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:13:46,052 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:13:46,053 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:13:46,081 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:13:46,082 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:13:46,083 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:13:46,083 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:13:46,088 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:13:46,088 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:13:46,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:13:46,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:13:46,089 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:13:46,089 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:13:46,089 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:13:46,090 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:13:46,090 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:13:46,090 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:13:46,090 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:13:46,090 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:13:46,092 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:13:46,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:13:46,092 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:13:46,092 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:13:46,093 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:13:46,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:13:46,093 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:13:46,094 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:13:46,094 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:13:46,095 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:13:46,095 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:13:46,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:13:46,095 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:13:46,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:13:46,095 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:13:46,096 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:13:46,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:13:46,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:13:46,096 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:13:46,096 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:13:46,097 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:13:46,097 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:13:46,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:13:46,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:13:46,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:13:46,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:13:46,324 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:13:46,324 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:13:46,325 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:13:47,339 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:13:47,572 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:13:47,573 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:13:47,583 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d9312ed3/9261b52a5e0147d6a589022e419f70ac/FLAG4dd85d823 [2024-06-21 16:13:47,594 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d9312ed3/9261b52a5e0147d6a589022e419f70ac [2024-06-21 16:13:47,597 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:13:47,598 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:13:47,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 16:13:47,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:13:47,732 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:13:47,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:13:47,733 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:13:47,739 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:13:47,740 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:13:47" (1/2) ... [2024-06-21 16:13:47,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ab29e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:13:47, skipping insertion in model container [2024-06-21 16:13:47,741 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:13:47" (1/2) ... [2024-06-21 16:13:47,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1615da90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:13:47, skipping insertion in model container [2024-06-21 16:13:47,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:13:47" (2/2) ... [2024-06-21 16:13:47,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ab29e1c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:47, skipping insertion in model container [2024-06-21 16:13:47,743 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:13:47" (2/2) ... [2024-06-21 16:13:47,743 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:13:47,804 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:13:47,806 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || (z == 0 || z == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-21 16:13:47,806 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || (z == 0 || z == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-21 16:13:47,806 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || (z == 0 || z == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-21 16:13:47,806 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:13:47,807 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-21 16:13:47,842 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:13:48,139 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:13:48,152 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:13:48,254 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:13:48,295 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:13:48,296 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48 WrapperNode [2024-06-21 16:13:48,296 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:13:48,297 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:13:48,297 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:13:48,297 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:13:48,302 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 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,322 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 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,346 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-21 16:13:48,346 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:13:48,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:13:48,347 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:13:48,347 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:13:48,356 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,359 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,372 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]. [2024-06-21 16:13:48,372 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,373 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,383 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,400 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,403 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:13:48,403 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:13:48,403 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:13:48,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:13:48,404 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (1/1) ... [2024-06-21 16:13:48,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:13:48,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:13:48,427 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) [2024-06-21 16:13:48,435 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 [2024-06-21 16:13:48,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:13:48,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:13:48,461 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:13:48,461 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:13:48,461 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:13:48,461 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:13:48,462 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:13:48,462 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:13:48,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:13:48,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:13:48,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:13:48,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:13:48,463 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:13:48,589 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:13:48,591 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:13:48,893 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:13:48,893 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:13:49,050 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:13:49,050 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:13:49,051 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:13:49 BoogieIcfgContainer [2024-06-21 16:13:49,051 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:13:49,053 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:13:49,053 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:13:49,056 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:13:49,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:13:47" (1/4) ... [2024-06-21 16:13:49,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75273eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:13:49, skipping insertion in model container [2024-06-21 16:13:49,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:13:47" (2/4) ... [2024-06-21 16:13:49,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75273eb1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:13:49, skipping insertion in model container [2024-06-21 16:13:49,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:13:48" (3/4) ... [2024-06-21 16:13:49,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75273eb1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:13:49, skipping insertion in model container [2024-06-21 16:13:49,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:13:49" (4/4) ... [2024-06-21 16:13:49,062 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:13:49,076 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:13:49,076 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:13:49,076 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:13:49,115 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:13:49,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 16:13:49,158 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 16:13:49,159 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:13:49,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:13:49,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 16:13:49,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 16:13:49,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:13:49,192 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;@5a9c0734, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:13:49,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:13:49,195 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:13:49,195 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 16:13:49,196 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:13:49,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:49,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:13:49,197 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)] === [2024-06-21 16:13:49,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash 377005305, now seen corresponding path program 1 times [2024-06-21 16:13:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:49,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419994511] [2024-06-21 16:13:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:49,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:50,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:50,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419994511] [2024-06-21 16:13:50,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419994511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:50,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:50,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:13:50,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984485998] [2024-06-21 16:13:50,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:50,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:13:50,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:50,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:13:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:13:50,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 16:13:50,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:50,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:50,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 16:13:50,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:50,435 INFO L124 PetriNetUnfolderBase]: 1363/2135 cut-off events. [2024-06-21 16:13:50,435 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 16:13:50,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4259 conditions, 2135 events. 1363/2135 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10695 event pairs, 964 based on Foata normal form. 1/2073 useless extension candidates. Maximal degree in co-relation 4247. Up to 2037 conditions per place. [2024-06-21 16:13:50,449 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 32 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 16:13:50,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 173 flow [2024-06-21 16:13:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:13:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:13:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-21 16:13:50,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 16:13:50,459 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 78 transitions. [2024-06-21 16:13:50,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 173 flow [2024-06-21 16:13:50,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:13:50,466 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 16:13:50,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 16:13:50,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 16:13:50,471 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 16:13:50,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:50,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:50,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:50,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:13:50,473 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)] === [2024-06-21 16:13:50,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1524958002, now seen corresponding path program 1 times [2024-06-21 16:13:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525644196] [2024-06-21 16:13:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:50,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:51,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:51,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525644196] [2024-06-21 16:13:51,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525644196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:51,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:51,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:13:51,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043838913] [2024-06-21 16:13:51,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:51,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:13:51,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:13:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:13:51,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 16:13:51,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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) [2024-06-21 16:13:51,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:51,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 16:13:51,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:51,344 INFO L124 PetriNetUnfolderBase]: 1357/2136 cut-off events. [2024-06-21 16:13:51,344 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2024-06-21 16:13:51,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4803 conditions, 2136 events. 1357/2136 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10701 event pairs, 840 based on Foata normal form. 3/2115 useless extension candidates. Maximal degree in co-relation 4791. Up to 2013 conditions per place. [2024-06-21 16:13:51,356 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 16:13:51,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-21 16:13:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:13:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:13:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-21 16:13:51,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-21 16:13:51,360 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 101 transitions. [2024-06-21 16:13:51,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-21 16:13:51,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:13:51,363 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 16:13:51,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 16:13:51,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 16:13:51,364 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 16:13:51,364 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) [2024-06-21 16:13:51,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:51,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:51,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:13:51,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:51,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash 29058688, now seen corresponding path program 1 times [2024-06-21 16:13:51,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:51,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876950362] [2024-06-21 16:13:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:51,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:51,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:51,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876950362] [2024-06-21 16:13:51,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876950362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:51,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:51,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:13:51,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257687857] [2024-06-21 16:13:51,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:51,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:13:51,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:13:51,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:13:52,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:13:52,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:52,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:52,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:13:52,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:52,327 INFO L124 PetriNetUnfolderBase]: 1661/2580 cut-off events. [2024-06-21 16:13:52,327 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2024-06-21 16:13:52,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6406 conditions, 2580 events. 1661/2580 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12701 event pairs, 812 based on Foata normal form. 5/2585 useless extension candidates. Maximal degree in co-relation 6392. Up to 2387 conditions per place. [2024-06-21 16:13:52,341 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-21 16:13:52,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 396 flow [2024-06-21 16:13:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:13:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:13:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 16:13:52,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-21 16:13:52,346 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 128 transitions. [2024-06-21 16:13:52,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 396 flow [2024-06-21 16:13:52,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 382 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:13:52,360 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 16:13:52,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 16:13:52,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 16:13:52,362 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 16:13:52,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:52,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:52,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:52,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:13:52,363 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)] === [2024-06-21 16:13:52,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:52,363 INFO L85 PathProgramCache]: Analyzing trace with hash 817703351, now seen corresponding path program 1 times [2024-06-21 16:13:52,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:52,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33598367] [2024-06-21 16:13:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:52,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:53,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:53,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33598367] [2024-06-21 16:13:53,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33598367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:53,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:53,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:13:53,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793784746] [2024-06-21 16:13:53,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:53,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:13:53,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:13:53,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:13:53,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:13:53,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:53,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:53,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:13:53,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:53,500 INFO L124 PetriNetUnfolderBase]: 1669/2592 cut-off events. [2024-06-21 16:13:53,500 INFO L125 PetriNetUnfolderBase]: For 3080/3082 co-relation queries the response was YES. [2024-06-21 16:13:53,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7525 conditions, 2592 events. 1669/2592 cut-off events. For 3080/3082 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12792 event pairs, 666 based on Foata normal form. 7/2599 useless extension candidates. Maximal degree in co-relation 7508. Up to 2373 conditions per place. [2024-06-21 16:13:53,515 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 60 selfloop transitions, 20 changer transitions 0/86 dead transitions. [2024-06-21 16:13:53,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 523 flow [2024-06-21 16:13:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:13:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:13:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 16:13:53,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-21 16:13:53,518 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 151 transitions. [2024-06-21 16:13:53,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 523 flow [2024-06-21 16:13:53,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 515 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 16:13:53,525 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 310 flow [2024-06-21 16:13:53,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-21 16:13:53,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 16:13:53,526 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 310 flow [2024-06-21 16:13:53,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:53,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:53,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:53,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:13:53,527 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:53,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:53,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2139342657, now seen corresponding path program 1 times [2024-06-21 16:13:53,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:53,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529744790] [2024-06-21 16:13:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:53,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:54,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:54,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529744790] [2024-06-21 16:13:54,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529744790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:54,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:54,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:13:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987757513] [2024-06-21 16:13:54,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:54,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:13:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:54,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:13:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:13:54,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:13:54,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:54,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:54,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:13:54,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:54,877 INFO L124 PetriNetUnfolderBase]: 1681/2612 cut-off events. [2024-06-21 16:13:54,877 INFO L125 PetriNetUnfolderBase]: For 4855/4857 co-relation queries the response was YES. [2024-06-21 16:13:54,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8396 conditions, 2612 events. 1681/2612 cut-off events. For 4855/4857 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12888 event pairs, 502 based on Foata normal form. 12/2624 useless extension candidates. Maximal degree in co-relation 8376. Up to 2341 conditions per place. [2024-06-21 16:13:54,896 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 64 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-21 16:13:54,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 624 flow [2024-06-21 16:13:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:13:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:13:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 16:13:54,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-21 16:13:54,898 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 310 flow. Second operand 7 states and 170 transitions. [2024-06-21 16:13:54,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 624 flow [2024-06-21 16:13:54,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 575 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:13:54,904 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 337 flow [2024-06-21 16:13:54,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-21 16:13:54,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 16:13:54,905 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 337 flow [2024-06-21 16:13:54,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:54,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:54,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:54,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:13:54,906 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)] === [2024-06-21 16:13:54,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash -799520460, now seen corresponding path program 1 times [2024-06-21 16:13:54,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:54,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53666833] [2024-06-21 16:13:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:54,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:55,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:55,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53666833] [2024-06-21 16:13:55,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53666833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:55,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:55,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:13:55,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995656294] [2024-06-21 16:13:55,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:55,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:13:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:13:55,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:13:55,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:13:55,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:55,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:55,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:13:55,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:55,989 INFO L124 PetriNetUnfolderBase]: 1676/2600 cut-off events. [2024-06-21 16:13:55,989 INFO L125 PetriNetUnfolderBase]: For 6554/6554 co-relation queries the response was YES. [2024-06-21 16:13:55,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8918 conditions, 2600 events. 1676/2600 cut-off events. For 6554/6554 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12779 event pairs, 659 based on Foata normal form. 2/2602 useless extension candidates. Maximal degree in co-relation 8896. Up to 2484 conditions per place. [2024-06-21 16:13:56,003 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 54 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-21 16:13:56,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 489 flow [2024-06-21 16:13:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:13:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:13:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 16:13:56,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 16:13:56,005 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 337 flow. Second operand 5 states and 96 transitions. [2024-06-21 16:13:56,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 489 flow [2024-06-21 16:13:56,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 425 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 16:13:56,009 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 297 flow [2024-06-21 16:13:56,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-21 16:13:56,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 16:13:56,010 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 297 flow [2024-06-21 16:13:56,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:56,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:56,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:56,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:13:56,011 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)] === [2024-06-21 16:13:56,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash 956042634, now seen corresponding path program 1 times [2024-06-21 16:13:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:56,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903912241] [2024-06-21 16:13:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:56,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:56,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903912241] [2024-06-21 16:13:56,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903912241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:56,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:56,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:13:56,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331082956] [2024-06-21 16:13:56,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:56,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:13:56,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:56,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:13:56,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:13:56,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:13:56,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:56,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:56,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:13:56,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:57,170 INFO L124 PetriNetUnfolderBase]: 1666/2623 cut-off events. [2024-06-21 16:13:57,170 INFO L125 PetriNetUnfolderBase]: For 7722/7722 co-relation queries the response was YES. [2024-06-21 16:13:57,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8905 conditions, 2623 events. 1666/2623 cut-off events. For 7722/7722 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13058 event pairs, 623 based on Foata normal form. 4/2627 useless extension candidates. Maximal degree in co-relation 8881. Up to 2452 conditions per place. [2024-06-21 16:13:57,190 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-21 16:13:57,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 497 flow [2024-06-21 16:13:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:13:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:13:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 16:13:57,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:13:57,191 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 297 flow. Second operand 6 states and 114 transitions. [2024-06-21 16:13:57,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 497 flow [2024-06-21 16:13:57,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 475 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:13:57,196 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 331 flow [2024-06-21 16:13:57,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-21 16:13:57,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 16:13:57,198 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 331 flow [2024-06-21 16:13:57,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:57,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:57,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:57,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:13:57,198 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)] === [2024-06-21 16:13:57,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:57,199 INFO L85 PathProgramCache]: Analyzing trace with hash -433169935, now seen corresponding path program 1 times [2024-06-21 16:13:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:57,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092238920] [2024-06-21 16:13:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:57,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:57,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:57,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092238920] [2024-06-21 16:13:57,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092238920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:57,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:57,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:13:57,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980468064] [2024-06-21 16:13:57,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:57,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:13:57,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:13:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:13:57,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:13:57,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:57,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:57,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:13:57,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:58,235 INFO L124 PetriNetUnfolderBase]: 1672/2628 cut-off events. [2024-06-21 16:13:58,236 INFO L125 PetriNetUnfolderBase]: For 9597/9601 co-relation queries the response was YES. [2024-06-21 16:13:58,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9502 conditions, 2628 events. 1672/2628 cut-off events. For 9597/9601 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13108 event pairs, 636 based on Foata normal form. 8/2636 useless extension candidates. Maximal degree in co-relation 9478. Up to 2404 conditions per place. [2024-06-21 16:13:58,248 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-21 16:13:58,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 82 transitions, 585 flow [2024-06-21 16:13:58,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:13:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:13:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 16:13:58,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 16:13:58,250 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 331 flow. Second operand 6 states and 122 transitions. [2024-06-21 16:13:58,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 82 transitions, 585 flow [2024-06-21 16:13:58,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 553 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:13:58,257 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 371 flow [2024-06-21 16:13:58,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-21 16:13:58,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-21 16:13:58,260 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 371 flow [2024-06-21 16:13:58,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:58,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:58,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:58,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:13:58,260 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)] === [2024-06-21 16:13:58,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1614720727, now seen corresponding path program 2 times [2024-06-21 16:13:58,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:58,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914807020] [2024-06-21 16:13:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:58,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:58,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:58,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914807020] [2024-06-21 16:13:58,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914807020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:58,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:58,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:13:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568168404] [2024-06-21 16:13:58,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:13:58,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:13:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:13:58,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:13:58,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 371 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:58,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:58,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:13:58,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:59,325 INFO L124 PetriNetUnfolderBase]: 1657/2602 cut-off events. [2024-06-21 16:13:59,325 INFO L125 PetriNetUnfolderBase]: For 11066/11066 co-relation queries the response was YES. [2024-06-21 16:13:59,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9664 conditions, 2602 events. 1657/2602 cut-off events. For 11066/11066 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12911 event pairs, 632 based on Foata normal form. 2/2604 useless extension candidates. Maximal degree in co-relation 9639. Up to 2445 conditions per place. [2024-06-21 16:13:59,339 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-21 16:13:59,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 553 flow [2024-06-21 16:13:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:13:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:13:59,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 16:13:59,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 16:13:59,341 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 371 flow. Second operand 6 states and 113 transitions. [2024-06-21 16:13:59,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 553 flow [2024-06-21 16:13:59,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 524 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:13:59,350 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 372 flow [2024-06-21 16:13:59,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=372, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-21 16:13:59,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 16:13:59,351 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 372 flow [2024-06-21 16:13:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:59,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:59,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:59,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:13:59,351 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)] === [2024-06-21 16:13:59,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:59,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1919588069, now seen corresponding path program 1 times [2024-06-21 16:13:59,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:59,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460520872] [2024-06-21 16:13:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:59,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:00,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:00,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460520872] [2024-06-21 16:14:00,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460520872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:00,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:00,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:14:00,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513144498] [2024-06-21 16:14:00,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:00,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:14:00,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:14:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:14:00,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:00,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 372 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) [2024-06-21 16:14:00,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:00,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:00,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:00,537 INFO L124 PetriNetUnfolderBase]: 1733/2713 cut-off events. [2024-06-21 16:14:00,537 INFO L125 PetriNetUnfolderBase]: For 13636/13636 co-relation queries the response was YES. [2024-06-21 16:14:00,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10300 conditions, 2713 events. 1733/2713 cut-off events. For 13636/13636 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13490 event pairs, 559 based on Foata normal form. 8/2720 useless extension candidates. Maximal degree in co-relation 10274. Up to 2371 conditions per place. [2024-06-21 16:14:00,550 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 68 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-21 16:14:00,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 726 flow [2024-06-21 16:14:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:14:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:14:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 16:14:00,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-21 16:14:00,552 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 372 flow. Second operand 7 states and 144 transitions. [2024-06-21 16:14:00,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 726 flow [2024-06-21 16:14:00,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 679 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:00,560 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 468 flow [2024-06-21 16:14:00,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=468, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2024-06-21 16:14:00,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-21 16:14:00,562 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 468 flow [2024-06-21 16:14:00,562 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) [2024-06-21 16:14:00,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:00,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:00,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:14:00,562 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)] === [2024-06-21 16:14:00,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:00,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1375890695, now seen corresponding path program 2 times [2024-06-21 16:14:00,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:00,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164678834] [2024-06-21 16:14:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:00,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:01,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:01,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164678834] [2024-06-21 16:14:01,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164678834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:01,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:01,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:14:01,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570390616] [2024-06-21 16:14:01,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:01,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:14:01,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:01,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:14:01,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:14:01,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:01,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 468 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) [2024-06-21 16:14:01,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:01,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:01,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:01,781 INFO L124 PetriNetUnfolderBase]: 1755/2745 cut-off events. [2024-06-21 16:14:01,782 INFO L125 PetriNetUnfolderBase]: For 16752/16752 co-relation queries the response was YES. [2024-06-21 16:14:01,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11396 conditions, 2745 events. 1755/2745 cut-off events. For 16752/16752 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13620 event pairs, 586 based on Foata normal form. 4/2749 useless extension candidates. Maximal degree in co-relation 11368. Up to 2569 conditions per place. [2024-06-21 16:14:01,797 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 76 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-21 16:14:01,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 95 transitions, 730 flow [2024-06-21 16:14:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:14:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:14:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:14:01,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 16:14:01,799 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 468 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:14:01,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 95 transitions, 730 flow [2024-06-21 16:14:01,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 702 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 16:14:01,814 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 512 flow [2024-06-21 16:14:01,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 16:14:01,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 16:14:01,814 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 512 flow [2024-06-21 16:14:01,815 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) [2024-06-21 16:14:01,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:01,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:01,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:14:01,815 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)] === [2024-06-21 16:14:01,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:01,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1511863067, now seen corresponding path program 3 times [2024-06-21 16:14:01,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:01,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879807875] [2024-06-21 16:14:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:01,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:02,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:02,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879807875] [2024-06-21 16:14:02,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879807875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:02,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:02,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:14:02,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381974732] [2024-06-21 16:14:02,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:02,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:14:02,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:02,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:14:02,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:14:02,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:02,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 512 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) [2024-06-21 16:14:02,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:02,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:02,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:02,985 INFO L124 PetriNetUnfolderBase]: 1745/2731 cut-off events. [2024-06-21 16:14:02,985 INFO L125 PetriNetUnfolderBase]: For 19600/19600 co-relation queries the response was YES. [2024-06-21 16:14:02,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11651 conditions, 2731 events. 1745/2731 cut-off events. For 19600/19600 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13556 event pairs, 584 based on Foata normal form. 4/2735 useless extension candidates. Maximal degree in co-relation 11620. Up to 2528 conditions per place. [2024-06-21 16:14:03,001 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-06-21 16:14:03,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 792 flow [2024-06-21 16:14:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:14:03,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:14:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 16:14:03,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 16:14:03,002 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 512 flow. Second operand 7 states and 134 transitions. [2024-06-21 16:14:03,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 792 flow [2024-06-21 16:14:03,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 744 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:03,037 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 552 flow [2024-06-21 16:14:03,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-21 16:14:03,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 16:14:03,038 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 552 flow [2024-06-21 16:14:03,038 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) [2024-06-21 16:14:03,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:03,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:03,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:14:03,038 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:03,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1153240174, now seen corresponding path program 1 times [2024-06-21 16:14:03,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:03,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542696468] [2024-06-21 16:14:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:03,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:03,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:03,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542696468] [2024-06-21 16:14:03,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542696468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:03,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:03,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:14:03,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584564839] [2024-06-21 16:14:03,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:03,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:14:03,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:03,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:14:03,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:14:03,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:03,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:03,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:03,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:03,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:04,035 INFO L124 PetriNetUnfolderBase]: 2236/3362 cut-off events. [2024-06-21 16:14:04,035 INFO L125 PetriNetUnfolderBase]: For 29493/29493 co-relation queries the response was YES. [2024-06-21 16:14:04,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14830 conditions, 3362 events. 2236/3362 cut-off events. For 29493/29493 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15975 event pairs, 822 based on Foata normal form. 1/3363 useless extension candidates. Maximal degree in co-relation 14799. Up to 3267 conditions per place. [2024-06-21 16:14:04,053 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-06-21 16:14:04,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 89 transitions, 752 flow [2024-06-21 16:14:04,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:14:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:14:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 16:14:04,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 16:14:04,055 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 552 flow. Second operand 5 states and 88 transitions. [2024-06-21 16:14:04,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 89 transitions, 752 flow [2024-06-21 16:14:04,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 89 transitions, 692 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:04,072 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 542 flow [2024-06-21 16:14:04,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=542, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-21 16:14:04,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 16:14:04,073 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 542 flow [2024-06-21 16:14:04,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:04,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:04,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:04,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:14:04,073 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)] === [2024-06-21 16:14:04,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash 331746832, now seen corresponding path program 1 times [2024-06-21 16:14:04,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:04,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174921032] [2024-06-21 16:14:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:04,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:04,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:04,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174921032] [2024-06-21 16:14:04,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174921032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:04,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:04,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:14:04,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423424730] [2024-06-21 16:14:04,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:04,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:14:04,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:04,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:14:04,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:14:04,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:04,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:04,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:04,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:04,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:05,469 INFO L124 PetriNetUnfolderBase]: 1830/2829 cut-off events. [2024-06-21 16:14:05,469 INFO L125 PetriNetUnfolderBase]: For 28816/28818 co-relation queries the response was YES. [2024-06-21 16:14:05,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13189 conditions, 2829 events. 1830/2829 cut-off events. For 28816/28818 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13971 event pairs, 608 based on Foata normal form. 4/2833 useless extension candidates. Maximal degree in co-relation 13157. Up to 2556 conditions per place. [2024-06-21 16:14:05,484 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 26 changer transitions 0/113 dead transitions. [2024-06-21 16:14:05,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 858 flow [2024-06-21 16:14:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:14:05,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 16:14:05,485 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 542 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:14:05,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 858 flow [2024-06-21 16:14:05,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 830 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 16:14:05,500 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 609 flow [2024-06-21 16:14:05,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=609, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-21 16:14:05,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 16:14:05,501 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 609 flow [2024-06-21 16:14:05,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:05,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:05,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:05,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:14:05,502 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)] === [2024-06-21 16:14:05,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:05,502 INFO L85 PathProgramCache]: Analyzing trace with hash 335561847, now seen corresponding path program 1 times [2024-06-21 16:14:05,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:05,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417721284] [2024-06-21 16:14:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:05,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:06,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:06,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417721284] [2024-06-21 16:14:06,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417721284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:06,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:06,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:06,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943810847] [2024-06-21 16:14:06,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:06,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:06,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:06,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:06,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:06,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:06,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 609 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) [2024-06-21 16:14:06,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:06,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:06,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:06,856 INFO L124 PetriNetUnfolderBase]: 1852/2865 cut-off events. [2024-06-21 16:14:06,856 INFO L125 PetriNetUnfolderBase]: For 33308/33308 co-relation queries the response was YES. [2024-06-21 16:14:06,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14003 conditions, 2865 events. 1852/2865 cut-off events. For 33308/33308 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14187 event pairs, 575 based on Foata normal form. 4/2868 useless extension candidates. Maximal degree in co-relation 13970. Up to 2478 conditions per place. [2024-06-21 16:14:06,873 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 79 selfloop transitions, 33 changer transitions 0/118 dead transitions. [2024-06-21 16:14:06,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 118 transitions, 1005 flow [2024-06-21 16:14:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:14:06,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 16:14:06,875 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 609 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:14:06,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 118 transitions, 1005 flow [2024-06-21 16:14:06,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 936 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:06,893 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 650 flow [2024-06-21 16:14:06,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=650, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-21 16:14:06,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 16:14:06,894 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 650 flow [2024-06-21 16:14:06,894 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) [2024-06-21 16:14:06,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:06,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:06,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:14:06,894 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)] === [2024-06-21 16:14:06,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash 335556267, now seen corresponding path program 2 times [2024-06-21 16:14:06,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:06,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971225348] [2024-06-21 16:14:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:06,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:07,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:07,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971225348] [2024-06-21 16:14:07,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971225348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:07,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:07,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:14:07,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47462910] [2024-06-21 16:14:07,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:07,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:14:07,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:07,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:14:07,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:14:07,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:07,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 650 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:07,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:07,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:07,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:07,997 INFO L124 PetriNetUnfolderBase]: 1874/2897 cut-off events. [2024-06-21 16:14:07,997 INFO L125 PetriNetUnfolderBase]: For 37698/37698 co-relation queries the response was YES. [2024-06-21 16:14:08,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14490 conditions, 2897 events. 1874/2897 cut-off events. For 37698/37698 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14406 event pairs, 573 based on Foata normal form. 4/2900 useless extension candidates. Maximal degree in co-relation 14456. Up to 2497 conditions per place. [2024-06-21 16:14:08,012 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 75 selfloop transitions, 39 changer transitions 0/120 dead transitions. [2024-06-21 16:14:08,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 120 transitions, 1058 flow [2024-06-21 16:14:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:14:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:14:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-21 16:14:08,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-21 16:14:08,014 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 650 flow. Second operand 7 states and 148 transitions. [2024-06-21 16:14:08,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 120 transitions, 1058 flow [2024-06-21 16:14:08,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 120 transitions, 962 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:08,033 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 682 flow [2024-06-21 16:14:08,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2024-06-21 16:14:08,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-21 16:14:08,034 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 682 flow [2024-06-21 16:14:08,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:08,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:08,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:08,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:14:08,035 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)] === [2024-06-21 16:14:08,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:08,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1263668271, now seen corresponding path program 3 times [2024-06-21 16:14:08,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:08,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060344072] [2024-06-21 16:14:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:08,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:08,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:08,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060344072] [2024-06-21 16:14:08,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060344072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:08,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:08,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:08,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998601636] [2024-06-21 16:14:08,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:08,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:08,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:08,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:08,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:08,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 682 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) [2024-06-21 16:14:08,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:08,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:08,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:09,258 INFO L124 PetriNetUnfolderBase]: 1896/2929 cut-off events. [2024-06-21 16:14:09,258 INFO L125 PetriNetUnfolderBase]: For 41619/41619 co-relation queries the response was YES. [2024-06-21 16:14:09,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14907 conditions, 2929 events. 1896/2929 cut-off events. For 41619/41619 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14578 event pairs, 609 based on Foata normal form. 4/2933 useless extension candidates. Maximal degree in co-relation 14872. Up to 2711 conditions per place. [2024-06-21 16:14:09,273 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 95 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-06-21 16:14:09,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 118 transitions, 1014 flow [2024-06-21 16:14:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:14:09,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 16:14:09,274 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 682 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:14:09,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 118 transitions, 1014 flow [2024-06-21 16:14:09,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 118 transitions, 929 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:09,299 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 687 flow [2024-06-21 16:14:09,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=687, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-06-21 16:14:09,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 16:14:09,300 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 687 flow [2024-06-21 16:14:09,300 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) [2024-06-21 16:14:09,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:09,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:09,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:14:09,300 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)] === [2024-06-21 16:14:09,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2018593127, now seen corresponding path program 4 times [2024-06-21 16:14:09,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:09,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393960278] [2024-06-21 16:14:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:09,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:09,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393960278] [2024-06-21 16:14:09,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393960278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:09,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:09,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:09,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576023552] [2024-06-21 16:14:09,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:09,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:09,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:09,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:09,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:10,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:10,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 687 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) [2024-06-21 16:14:10,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:10,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:10,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:10,666 INFO L124 PetriNetUnfolderBase]: 1886/2915 cut-off events. [2024-06-21 16:14:10,666 INFO L125 PetriNetUnfolderBase]: For 45121/45121 co-relation queries the response was YES. [2024-06-21 16:14:10,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14905 conditions, 2915 events. 1886/2915 cut-off events. For 45121/45121 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14510 event pairs, 602 based on Foata normal form. 4/2919 useless extension candidates. Maximal degree in co-relation 14869. Up to 2670 conditions per place. [2024-06-21 16:14:10,684 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 91 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-21 16:14:10,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 119 transitions, 983 flow [2024-06-21 16:14:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:14:10,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:14:10,687 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 687 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:14:10,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 119 transitions, 983 flow [2024-06-21 16:14:10,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 119 transitions, 909 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:10,718 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 665 flow [2024-06-21 16:14:10,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=665, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-21 16:14:10,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 16:14:10,719 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 665 flow [2024-06-21 16:14:10,719 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) [2024-06-21 16:14:10,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:10,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:10,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:14:10,720 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)] === [2024-06-21 16:14:10,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2010964430, now seen corresponding path program 1 times [2024-06-21 16:14:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:10,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057564086] [2024-06-21 16:14:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:10,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:11,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:11,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057564086] [2024-06-21 16:14:11,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057564086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:11,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:11,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:14:11,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883473779] [2024-06-21 16:14:11,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:11,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:14:11,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:14:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:14:11,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:11,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 665 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:11,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:11,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:11,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:12,678 INFO L124 PetriNetUnfolderBase]: 2240/3399 cut-off events. [2024-06-21 16:14:12,678 INFO L125 PetriNetUnfolderBase]: For 56677/56677 co-relation queries the response was YES. [2024-06-21 16:14:12,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17293 conditions, 3399 events. 2240/3399 cut-off events. For 56677/56677 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16372 event pairs, 741 based on Foata normal form. 4/3403 useless extension candidates. Maximal degree in co-relation 17256. Up to 3208 conditions per place. [2024-06-21 16:14:12,696 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 18 changer transitions 0/122 dead transitions. [2024-06-21 16:14:12,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 122 transitions, 1009 flow [2024-06-21 16:14:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:14:12,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 16:14:12,697 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 665 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:14:12,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 122 transitions, 1009 flow [2024-06-21 16:14:12,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 912 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:14:12,722 INFO L231 Difference]: Finished difference. Result has 90 places, 98 transitions, 671 flow [2024-06-21 16:14:12,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=671, PETRI_PLACES=90, PETRI_TRANSITIONS=98} [2024-06-21 16:14:12,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 16:14:12,723 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 98 transitions, 671 flow [2024-06-21 16:14:12,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:12,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:12,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:12,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:14:12,724 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:12,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1390705951, now seen corresponding path program 1 times [2024-06-21 16:14:12,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:12,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247093942] [2024-06-21 16:14:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:12,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:13,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:13,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247093942] [2024-06-21 16:14:13,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247093942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:13,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:13,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:14:13,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261387481] [2024-06-21 16:14:13,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:13,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:14:13,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:13,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:14:13,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:14:13,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:13,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 98 transitions, 671 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:13,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:13,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:13,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:13,820 INFO L124 PetriNetUnfolderBase]: 2292/3448 cut-off events. [2024-06-21 16:14:13,820 INFO L125 PetriNetUnfolderBase]: For 60807/60807 co-relation queries the response was YES. [2024-06-21 16:14:13,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17740 conditions, 3448 events. 2292/3448 cut-off events. For 60807/60807 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16276 event pairs, 802 based on Foata normal form. 3/3451 useless extension candidates. Maximal degree in co-relation 17701. Up to 3348 conditions per place. [2024-06-21 16:14:13,838 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 90 selfloop transitions, 11 changer transitions 0/112 dead transitions. [2024-06-21 16:14:13,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 112 transitions, 927 flow [2024-06-21 16:14:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:14:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:14:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 16:14:13,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-21 16:14:13,839 INFO L175 Difference]: Start difference. First operand has 90 places, 98 transitions, 671 flow. Second operand 6 states and 103 transitions. [2024-06-21 16:14:13,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 112 transitions, 927 flow [2024-06-21 16:14:13,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 872 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:13,864 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 678 flow [2024-06-21 16:14:13,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=678, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-06-21 16:14:13,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-21 16:14:13,865 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 678 flow [2024-06-21 16:14:13,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:13,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:13,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:13,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:14:13,866 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)] === [2024-06-21 16:14:13,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1694157934, now seen corresponding path program 1 times [2024-06-21 16:14:13,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:13,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115862522] [2024-06-21 16:14:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:13,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:14,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:14,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115862522] [2024-06-21 16:14:14,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115862522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:14,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:14,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:14,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522875661] [2024-06-21 16:14:14,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:14,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:14,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:14,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:14,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:14,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:14,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 678 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:14,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:14,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:14,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:15,440 INFO L124 PetriNetUnfolderBase]: 2124/3270 cut-off events. [2024-06-21 16:14:15,441 INFO L125 PetriNetUnfolderBase]: For 65040/65042 co-relation queries the response was YES. [2024-06-21 16:14:15,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17647 conditions, 3270 events. 2124/3270 cut-off events. For 65040/65042 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16374 event pairs, 552 based on Foata normal form. 6/3271 useless extension candidates. Maximal degree in co-relation 17607. Up to 2880 conditions per place. [2024-06-21 16:14:15,456 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 29 changer transitions 0/138 dead transitions. [2024-06-21 16:14:15,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 1158 flow [2024-06-21 16:14:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:14:15,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 16:14:15,458 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 678 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:14:15,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 1158 flow [2024-06-21 16:14:15,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 138 transitions, 1118 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:15,481 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 767 flow [2024-06-21 16:14:15,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=767, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-21 16:14:15,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 16:14:15,482 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 767 flow [2024-06-21 16:14:15,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:15,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:15,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:15,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:14:15,483 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)] === [2024-06-21 16:14:15,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:15,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2064934826, now seen corresponding path program 2 times [2024-06-21 16:14:15,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:15,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068099174] [2024-06-21 16:14:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:15,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:16,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:16,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068099174] [2024-06-21 16:14:16,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068099174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:16,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:16,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:16,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265570450] [2024-06-21 16:14:16,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:16,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:16,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:16,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:16,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:16,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:16,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 767 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:16,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:16,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:16,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:16,992 INFO L124 PetriNetUnfolderBase]: 2152/3313 cut-off events. [2024-06-21 16:14:16,992 INFO L125 PetriNetUnfolderBase]: For 71715/71717 co-relation queries the response was YES. [2024-06-21 16:14:17,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18375 conditions, 3313 events. 2152/3313 cut-off events. For 71715/71717 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16648 event pairs, 677 based on Foata normal form. 6/3314 useless extension candidates. Maximal degree in co-relation 18334. Up to 2996 conditions per place. [2024-06-21 16:14:17,011 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 105 selfloop transitions, 28 changer transitions 0/140 dead transitions. [2024-06-21 16:14:17,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 140 transitions, 1161 flow [2024-06-21 16:14:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:14:17,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 16:14:17,012 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 767 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:14:17,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 140 transitions, 1161 flow [2024-06-21 16:14:17,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 140 transitions, 1093 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:17,051 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 818 flow [2024-06-21 16:14:17,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=99, PETRI_TRANSITIONS=110} [2024-06-21 16:14:17,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-21 16:14:17,052 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 818 flow [2024-06-21 16:14:17,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:17,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:17,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:17,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:14:17,052 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)] === [2024-06-21 16:14:17,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1694218508, now seen corresponding path program 1 times [2024-06-21 16:14:17,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:17,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378718562] [2024-06-21 16:14:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:17,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:17,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:17,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378718562] [2024-06-21 16:14:17,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378718562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:17,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:17,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:17,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122228117] [2024-06-21 16:14:17,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:17,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:17,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:17,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:17,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:17,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:17,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 818 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:17,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:17,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:17,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:18,534 INFO L124 PetriNetUnfolderBase]: 2176/3346 cut-off events. [2024-06-21 16:14:18,534 INFO L125 PetriNetUnfolderBase]: For 78493/78493 co-relation queries the response was YES. [2024-06-21 16:14:18,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18834 conditions, 3346 events. 2176/3346 cut-off events. For 78493/78493 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16819 event pairs, 611 based on Foata normal form. 4/3343 useless extension candidates. Maximal degree in co-relation 18791. Up to 2740 conditions per place. [2024-06-21 16:14:18,551 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 97 selfloop transitions, 56 changer transitions 0/160 dead transitions. [2024-06-21 16:14:18,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 160 transitions, 1510 flow [2024-06-21 16:14:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:14:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:14:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 16:14:18,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-21 16:14:18,552 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 818 flow. Second operand 9 states and 184 transitions. [2024-06-21 16:14:18,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 160 transitions, 1510 flow [2024-06-21 16:14:18,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 160 transitions, 1450 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:18,586 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 1021 flow [2024-06-21 16:14:18,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1021, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-06-21 16:14:18,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-21 16:14:18,587 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 1021 flow [2024-06-21 16:14:18,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:18,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:18,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:18,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:14:18,588 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)] === [2024-06-21 16:14:18,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash -39906168, now seen corresponding path program 2 times [2024-06-21 16:14:18,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:18,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817081517] [2024-06-21 16:14:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:18,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:19,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:19,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817081517] [2024-06-21 16:14:19,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817081517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:19,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:19,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:19,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531422320] [2024-06-21 16:14:19,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:19,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:19,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:19,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:19,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:19,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:19,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 1021 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:19,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:19,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:19,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:20,045 INFO L124 PetriNetUnfolderBase]: 2198/3383 cut-off events. [2024-06-21 16:14:20,045 INFO L125 PetriNetUnfolderBase]: For 86406/86406 co-relation queries the response was YES. [2024-06-21 16:14:20,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20043 conditions, 3383 events. 2198/3383 cut-off events. For 86406/86406 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17091 event pairs, 624 based on Foata normal form. 4/3385 useless extension candidates. Maximal degree in co-relation 19998. Up to 2928 conditions per place. [2024-06-21 16:14:20,068 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 100 selfloop transitions, 44 changer transitions 0/151 dead transitions. [2024-06-21 16:14:20,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 151 transitions, 1427 flow [2024-06-21 16:14:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:14:20,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 16:14:20,069 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 1021 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:14:20,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 151 transitions, 1427 flow [2024-06-21 16:14:20,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 151 transitions, 1367 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 16:14:20,122 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 1103 flow [2024-06-21 16:14:20,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1103, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-06-21 16:14:20,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 16:14:20,122 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 1103 flow [2024-06-21 16:14:20,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:20,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:20,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:20,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:14:20,123 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)] === [2024-06-21 16:14:20,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:20,123 INFO L85 PathProgramCache]: Analyzing trace with hash -39910818, now seen corresponding path program 3 times [2024-06-21 16:14:20,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:20,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487377357] [2024-06-21 16:14:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:20,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:20,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:20,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487377357] [2024-06-21 16:14:20,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487377357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:20,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:20,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:20,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120906946] [2024-06-21 16:14:20,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:20,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:20,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:20,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:20,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:20,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:20,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 1103 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:20,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:20,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:20,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:21,543 INFO L124 PetriNetUnfolderBase]: 2220/3421 cut-off events. [2024-06-21 16:14:21,543 INFO L125 PetriNetUnfolderBase]: For 93806/93806 co-relation queries the response was YES. [2024-06-21 16:14:21,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20686 conditions, 3421 events. 2220/3421 cut-off events. For 93806/93806 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17314 event pairs, 628 based on Foata normal form. 4/3423 useless extension candidates. Maximal degree in co-relation 20639. Up to 2900 conditions per place. [2024-06-21 16:14:21,563 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 97 selfloop transitions, 54 changer transitions 0/158 dead transitions. [2024-06-21 16:14:21,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 158 transitions, 1635 flow [2024-06-21 16:14:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 16:14:21,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-21 16:14:21,565 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 1103 flow. Second operand 8 states and 165 transitions. [2024-06-21 16:14:21,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 158 transitions, 1635 flow [2024-06-21 16:14:21,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 158 transitions, 1529 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:21,617 INFO L231 Difference]: Finished difference. Result has 112 places, 125 transitions, 1159 flow [2024-06-21 16:14:21,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1159, PETRI_PLACES=112, PETRI_TRANSITIONS=125} [2024-06-21 16:14:21,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 16:14:21,618 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 125 transitions, 1159 flow [2024-06-21 16:14:21,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:21,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:21,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:21,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:14:21,618 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)] === [2024-06-21 16:14:21,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:21,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1697014894, now seen corresponding path program 3 times [2024-06-21 16:14:21,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:21,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232426212] [2024-06-21 16:14:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:21,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:22,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:22,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232426212] [2024-06-21 16:14:22,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232426212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:22,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:22,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:22,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219627987] [2024-06-21 16:14:22,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:22,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:22,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:22,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:22,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:22,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:22,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 125 transitions, 1159 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:22,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:22,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:22,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:23,182 INFO L124 PetriNetUnfolderBase]: 2212/3409 cut-off events. [2024-06-21 16:14:23,183 INFO L125 PetriNetUnfolderBase]: For 99779/99781 co-relation queries the response was YES. [2024-06-21 16:14:23,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20875 conditions, 3409 events. 2212/3409 cut-off events. For 99779/99781 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17252 event pairs, 660 based on Foata normal form. 6/3410 useless extension candidates. Maximal degree in co-relation 20827. Up to 3117 conditions per place. [2024-06-21 16:14:23,207 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 24 changer transitions 0/152 dead transitions. [2024-06-21 16:14:23,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 152 transitions, 1517 flow [2024-06-21 16:14:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:14:23,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 16:14:23,209 INFO L175 Difference]: Start difference. First operand has 112 places, 125 transitions, 1159 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:14:23,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 152 transitions, 1517 flow [2024-06-21 16:14:23,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 152 transitions, 1376 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:23,274 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 1073 flow [2024-06-21 16:14:23,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1073, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-06-21 16:14:23,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 16:14:23,274 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 1073 flow [2024-06-21 16:14:23,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:23,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:23,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:23,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:14:23,275 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)] === [2024-06-21 16:14:23,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:23,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2111944666, now seen corresponding path program 4 times [2024-06-21 16:14:23,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:23,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10859185] [2024-06-21 16:14:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:23,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:24,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:24,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10859185] [2024-06-21 16:14:24,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10859185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:24,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:24,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:24,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452557929] [2024-06-21 16:14:24,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:24,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:24,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:24,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:24,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:24,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:24,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 1073 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:24,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:24,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:24,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:24,761 INFO L124 PetriNetUnfolderBase]: 2250/3463 cut-off events. [2024-06-21 16:14:24,762 INFO L125 PetriNetUnfolderBase]: For 107335/107335 co-relation queries the response was YES. [2024-06-21 16:14:24,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21281 conditions, 3463 events. 2250/3463 cut-off events. For 107335/107335 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17481 event pairs, 612 based on Foata normal form. 4/3465 useless extension candidates. Maximal degree in co-relation 21232. Up to 2925 conditions per place. [2024-06-21 16:14:24,783 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 113 selfloop transitions, 54 changer transitions 0/174 dead transitions. [2024-06-21 16:14:24,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 174 transitions, 1715 flow [2024-06-21 16:14:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:14:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:14:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 16:14:24,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:14:24,785 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 1073 flow. Second operand 9 states and 189 transitions. [2024-06-21 16:14:24,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 174 transitions, 1715 flow [2024-06-21 16:14:24,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 174 transitions, 1631 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 16:14:24,847 INFO L231 Difference]: Finished difference. Result has 115 places, 131 transitions, 1204 flow [2024-06-21 16:14:24,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1204, PETRI_PLACES=115, PETRI_TRANSITIONS=131} [2024-06-21 16:14:24,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 16:14:24,847 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 131 transitions, 1204 flow [2024-06-21 16:14:24,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:24,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:24,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:24,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:14:24,848 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)] === [2024-06-21 16:14:24,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2111767036, now seen corresponding path program 5 times [2024-06-21 16:14:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:24,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034444655] [2024-06-21 16:14:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:25,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:25,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034444655] [2024-06-21 16:14:25,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034444655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:25,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:25,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:14:25,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442658847] [2024-06-21 16:14:25,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:25,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:14:25,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:14:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:14:25,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:25,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 131 transitions, 1204 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) [2024-06-21 16:14:25,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:25,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:25,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:26,482 INFO L124 PetriNetUnfolderBase]: 2272/3496 cut-off events. [2024-06-21 16:14:26,482 INFO L125 PetriNetUnfolderBase]: For 115316/115316 co-relation queries the response was YES. [2024-06-21 16:14:26,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21933 conditions, 3496 events. 2272/3496 cut-off events. For 115316/115316 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17742 event pairs, 624 based on Foata normal form. 4/3498 useless extension candidates. Maximal degree in co-relation 21883. Up to 3002 conditions per place. [2024-06-21 16:14:26,502 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 115 selfloop transitions, 49 changer transitions 0/171 dead transitions. [2024-06-21 16:14:26,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1796 flow [2024-06-21 16:14:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:14:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:14:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:14:26,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 16:14:26,503 INFO L175 Difference]: Start difference. First operand has 115 places, 131 transitions, 1204 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:14:26,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1796 flow [2024-06-21 16:14:26,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 171 transitions, 1705 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:26,570 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1277 flow [2024-06-21 16:14:26,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1277, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2024-06-21 16:14:26,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 16:14:26,570 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1277 flow [2024-06-21 16:14:26,571 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) [2024-06-21 16:14:26,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:26,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:26,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:14:26,571 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:26,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:26,571 INFO L85 PathProgramCache]: Analyzing trace with hash -174605455, now seen corresponding path program 1 times [2024-06-21 16:14:26,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:26,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314713741] [2024-06-21 16:14:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:26,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:27,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:27,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314713741] [2024-06-21 16:14:27,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314713741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:27,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:27,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:14:27,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674645570] [2024-06-21 16:14:27,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:27,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:14:27,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:27,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:14:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:14:27,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:27,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1277 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:27,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:27,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:27,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:27,619 INFO L124 PetriNetUnfolderBase]: 2511/3772 cut-off events. [2024-06-21 16:14:27,619 INFO L125 PetriNetUnfolderBase]: For 124298/124298 co-relation queries the response was YES. [2024-06-21 16:14:27,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23715 conditions, 3772 events. 2511/3772 cut-off events. For 124298/124298 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18122 event pairs, 797 based on Foata normal form. 1/3773 useless extension candidates. Maximal degree in co-relation 23663. Up to 3634 conditions per place. [2024-06-21 16:14:27,640 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 16 changer transitions 0/156 dead transitions. [2024-06-21 16:14:27,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 156 transitions, 1719 flow [2024-06-21 16:14:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:14:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:14:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 16:14:27,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:14:27,641 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1277 flow. Second operand 6 states and 110 transitions. [2024-06-21 16:14:27,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 156 transitions, 1719 flow [2024-06-21 16:14:27,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 156 transitions, 1587 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 16:14:27,717 INFO L231 Difference]: Finished difference. Result has 118 places, 140 transitions, 1253 flow [2024-06-21 16:14:27,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1253, PETRI_PLACES=118, PETRI_TRANSITIONS=140} [2024-06-21 16:14:27,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 16:14:27,718 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 140 transitions, 1253 flow [2024-06-21 16:14:27,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:27,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:27,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:27,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:14:27,719 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)] === [2024-06-21 16:14:27,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:27,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1946127902, now seen corresponding path program 6 times [2024-06-21 16:14:27,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:27,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673256366] [2024-06-21 16:14:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:27,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:28,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:28,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673256366] [2024-06-21 16:14:28,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673256366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:28,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:28,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:14:28,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24449910] [2024-06-21 16:14:28,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:28,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:14:28,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:28,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:14:28,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:14:28,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:28,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 140 transitions, 1253 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) [2024-06-21 16:14:28,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:28,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:28,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:29,331 INFO L124 PetriNetUnfolderBase]: 2315/3550 cut-off events. [2024-06-21 16:14:29,332 INFO L125 PetriNetUnfolderBase]: For 131710/131710 co-relation queries the response was YES. [2024-06-21 16:14:29,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23036 conditions, 3550 events. 2315/3550 cut-off events. For 131710/131710 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17942 event pairs, 657 based on Foata normal form. 4/3549 useless extension candidates. Maximal degree in co-relation 22983. Up to 3228 conditions per place. [2024-06-21 16:14:29,357 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 138 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2024-06-21 16:14:29,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 179 transitions, 1897 flow [2024-06-21 16:14:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:14:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:14:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 16:14:29,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 16:14:29,358 INFO L175 Difference]: Start difference. First operand has 118 places, 140 transitions, 1253 flow. Second operand 9 states and 173 transitions. [2024-06-21 16:14:29,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 179 transitions, 1897 flow [2024-06-21 16:14:29,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 179 transitions, 1863 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 16:14:29,433 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1422 flow [2024-06-21 16:14:29,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1422, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-21 16:14:29,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 16:14:29,434 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1422 flow [2024-06-21 16:14:29,434 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) [2024-06-21 16:14:29,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:29,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:29,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:14:29,435 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)] === [2024-06-21 16:14:29,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:29,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2076024806, now seen corresponding path program 7 times [2024-06-21 16:14:29,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:29,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798810250] [2024-06-21 16:14:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:29,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:30,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798810250] [2024-06-21 16:14:30,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798810250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:30,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:30,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:14:30,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419635190] [2024-06-21 16:14:30,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:30,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:14:30,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:14:30,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:14:30,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:30,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1422 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) [2024-06-21 16:14:30,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:30,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:30,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:30,988 INFO L124 PetriNetUnfolderBase]: 2313/3550 cut-off events. [2024-06-21 16:14:30,988 INFO L125 PetriNetUnfolderBase]: For 141247/141247 co-relation queries the response was YES. [2024-06-21 16:14:31,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23626 conditions, 3550 events. 2313/3550 cut-off events. For 141247/141247 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17935 event pairs, 616 based on Foata normal form. 6/3549 useless extension candidates. Maximal degree in co-relation 23570. Up to 3251 conditions per place. [2024-06-21 16:14:31,014 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 145 selfloop transitions, 22 changer transitions 0/176 dead transitions. [2024-06-21 16:14:31,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 1836 flow [2024-06-21 16:14:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:14:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:14:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:14:31,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 16:14:31,015 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1422 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:14:31,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 1836 flow [2024-06-21 16:14:31,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 176 transitions, 1719 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:31,108 INFO L231 Difference]: Finished difference. Result has 129 places, 146 transitions, 1357 flow [2024-06-21 16:14:31,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1357, PETRI_PLACES=129, PETRI_TRANSITIONS=146} [2024-06-21 16:14:31,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 16:14:31,109 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 146 transitions, 1357 flow [2024-06-21 16:14:31,109 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) [2024-06-21 16:14:31,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:31,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:31,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:14:31,109 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)] === [2024-06-21 16:14:31,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2084602630, now seen corresponding path program 1 times [2024-06-21 16:14:31,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:31,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366648110] [2024-06-21 16:14:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:31,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:31,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366648110] [2024-06-21 16:14:31,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366648110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:31,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:31,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:14:31,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568590571] [2024-06-21 16:14:31,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:31,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:14:31,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:31,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:14:31,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:14:32,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:32,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 146 transitions, 1357 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:32,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:32,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:32,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:32,769 INFO L124 PetriNetUnfolderBase]: 2514/3792 cut-off events. [2024-06-21 16:14:32,769 INFO L125 PetriNetUnfolderBase]: For 148940/148940 co-relation queries the response was YES. [2024-06-21 16:14:32,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24830 conditions, 3792 events. 2514/3792 cut-off events. For 148940/148940 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18341 event pairs, 739 based on Foata normal form. 2/3794 useless extension candidates. Maximal degree in co-relation 24773. Up to 3590 conditions per place. [2024-06-21 16:14:32,794 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2024-06-21 16:14:32,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 173 transitions, 1787 flow [2024-06-21 16:14:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:14:32,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 16:14:32,795 INFO L175 Difference]: Start difference. First operand has 129 places, 146 transitions, 1357 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:14:32,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 173 transitions, 1787 flow [2024-06-21 16:14:32,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 173 transitions, 1684 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 16:14:32,887 INFO L231 Difference]: Finished difference. Result has 129 places, 149 transitions, 1352 flow [2024-06-21 16:14:32,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1352, PETRI_PLACES=129, PETRI_TRANSITIONS=149} [2024-06-21 16:14:32,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 16:14:32,888 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 149 transitions, 1352 flow [2024-06-21 16:14:32,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:32,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:32,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:32,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:14:32,889 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)] === [2024-06-21 16:14:32,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:32,889 INFO L85 PathProgramCache]: Analyzing trace with hash 364181675, now seen corresponding path program 2 times [2024-06-21 16:14:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:32,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592585824] [2024-06-21 16:14:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:32,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:33,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592585824] [2024-06-21 16:14:33,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592585824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:33,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:33,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:14:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063978483] [2024-06-21 16:14:33,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:33,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:14:33,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:33,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:14:33,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:14:33,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:33,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 149 transitions, 1352 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:33,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:33,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:33,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:33,998 INFO L124 PetriNetUnfolderBase]: 2543/3820 cut-off events. [2024-06-21 16:14:33,998 INFO L125 PetriNetUnfolderBase]: For 154919/154919 co-relation queries the response was YES. [2024-06-21 16:14:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24812 conditions, 3820 events. 2543/3820 cut-off events. For 154919/154919 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18372 event pairs, 790 based on Foata normal form. 1/3821 useless extension candidates. Maximal degree in co-relation 24754. Up to 3701 conditions per place. [2024-06-21 16:14:34,026 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 132 selfloop transitions, 11 changer transitions 0/158 dead transitions. [2024-06-21 16:14:34,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 158 transitions, 1660 flow [2024-06-21 16:14:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:14:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:14:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 16:14:34,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 16:14:34,027 INFO L175 Difference]: Start difference. First operand has 129 places, 149 transitions, 1352 flow. Second operand 6 states and 101 transitions. [2024-06-21 16:14:34,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 158 transitions, 1660 flow [2024-06-21 16:14:34,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 158 transitions, 1582 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 16:14:34,111 INFO L231 Difference]: Finished difference. Result has 128 places, 149 transitions, 1302 flow [2024-06-21 16:14:34,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1302, PETRI_PLACES=128, PETRI_TRANSITIONS=149} [2024-06-21 16:14:34,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 16:14:34,112 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 149 transitions, 1302 flow [2024-06-21 16:14:34,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:34,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:34,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:34,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:14:34,112 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:34,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1762659651, now seen corresponding path program 1 times [2024-06-21 16:14:34,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:34,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824597440] [2024-06-21 16:14:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:34,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:34,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:34,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824597440] [2024-06-21 16:14:34,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824597440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:34,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:34,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:14:34,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328212549] [2024-06-21 16:14:34,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:34,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:14:34,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:14:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:14:34,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:34,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 149 transitions, 1302 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:34,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:34,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:34,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:35,329 INFO L124 PetriNetUnfolderBase]: 2680/3959 cut-off events. [2024-06-21 16:14:35,329 INFO L125 PetriNetUnfolderBase]: For 164107/164107 co-relation queries the response was YES. [2024-06-21 16:14:35,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25798 conditions, 3959 events. 2680/3959 cut-off events. For 164107/164107 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18545 event pairs, 805 based on Foata normal form. 1/3960 useless extension candidates. Maximal degree in co-relation 25739. Up to 3928 conditions per place. [2024-06-21 16:14:35,358 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 149 selfloop transitions, 16 changer transitions 0/168 dead transitions. [2024-06-21 16:14:35,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 168 transitions, 1794 flow [2024-06-21 16:14:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:14:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:14:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 16:14:35,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:14:35,360 INFO L175 Difference]: Start difference. First operand has 128 places, 149 transitions, 1302 flow. Second operand 6 states and 102 transitions. [2024-06-21 16:14:35,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 168 transitions, 1794 flow [2024-06-21 16:14:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 168 transitions, 1762 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:35,459 INFO L231 Difference]: Finished difference. Result has 129 places, 155 transitions, 1378 flow [2024-06-21 16:14:35,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1378, PETRI_PLACES=129, PETRI_TRANSITIONS=155} [2024-06-21 16:14:35,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 16:14:35,460 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 155 transitions, 1378 flow [2024-06-21 16:14:35,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:35,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:35,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:35,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:14:35,461 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:35,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:35,461 INFO L85 PathProgramCache]: Analyzing trace with hash 382062227, now seen corresponding path program 2 times [2024-06-21 16:14:35,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:35,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978397655] [2024-06-21 16:14:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:35,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:35,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:35,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978397655] [2024-06-21 16:14:35,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978397655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:35,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:35,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:14:35,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279191312] [2024-06-21 16:14:35,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:35,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:14:35,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:35,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:14:35,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:14:35,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:35,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 155 transitions, 1378 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:35,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:35,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:35,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:36,611 INFO L124 PetriNetUnfolderBase]: 2677/3956 cut-off events. [2024-06-21 16:14:36,611 INFO L125 PetriNetUnfolderBase]: For 173652/173654 co-relation queries the response was YES. [2024-06-21 16:14:36,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26351 conditions, 3956 events. 2677/3956 cut-off events. For 173652/173654 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18546 event pairs, 808 based on Foata normal form. 3/3959 useless extension candidates. Maximal degree in co-relation 26291. Up to 3925 conditions per place. [2024-06-21 16:14:36,640 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 16 changer transitions 0/164 dead transitions. [2024-06-21 16:14:36,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 164 transitions, 1722 flow [2024-06-21 16:14:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:14:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:14:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 16:14:36,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 16:14:36,641 INFO L175 Difference]: Start difference. First operand has 129 places, 155 transitions, 1378 flow. Second operand 6 states and 98 transitions. [2024-06-21 16:14:36,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 164 transitions, 1722 flow [2024-06-21 16:14:36,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 164 transitions, 1666 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 16:14:36,754 INFO L231 Difference]: Finished difference. Result has 133 places, 155 transitions, 1360 flow [2024-06-21 16:14:36,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1360, PETRI_PLACES=133, PETRI_TRANSITIONS=155} [2024-06-21 16:14:36,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 16:14:36,755 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 155 transitions, 1360 flow [2024-06-21 16:14:36,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:36,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:36,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:36,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:14:36,755 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)] === [2024-06-21 16:14:36,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:36,755 INFO L85 PathProgramCache]: Analyzing trace with hash 979289710, now seen corresponding path program 1 times [2024-06-21 16:14:36,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:36,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683097207] [2024-06-21 16:14:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:36,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:37,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:37,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683097207] [2024-06-21 16:14:37,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683097207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:37,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:37,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:14:37,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135594906] [2024-06-21 16:14:37,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:37,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:14:37,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:37,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:14:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:14:37,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:37,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 155 transitions, 1360 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-21 16:14:37,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:37,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:37,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:38,326 INFO L124 PetriNetUnfolderBase]: 2593/3980 cut-off events. [2024-06-21 16:14:38,326 INFO L125 PetriNetUnfolderBase]: For 209222/209222 co-relation queries the response was YES. [2024-06-21 16:14:38,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27661 conditions, 3980 events. 2593/3980 cut-off events. For 209222/209222 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20646 event pairs, 404 based on Foata normal form. 16/3972 useless extension candidates. Maximal degree in co-relation 27599. Up to 2663 conditions per place. [2024-06-21 16:14:38,358 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 73 changer transitions 0/206 dead transitions. [2024-06-21 16:14:38,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 206 transitions, 2088 flow [2024-06-21 16:14:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:14:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:14:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 16:14:38,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-21 16:14:38,359 INFO L175 Difference]: Start difference. First operand has 133 places, 155 transitions, 1360 flow. Second operand 9 states and 190 transitions. [2024-06-21 16:14:38,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 206 transitions, 2088 flow [2024-06-21 16:14:38,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 206 transitions, 2040 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:38,483 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1514 flow [2024-06-21 16:14:38,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1514, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2024-06-21 16:14:38,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-21 16:14:38,483 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1514 flow [2024-06-21 16:14:38,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-21 16:14:38,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:38,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:38,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:14:38,484 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)] === [2024-06-21 16:14:38,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash 981167380, now seen corresponding path program 2 times [2024-06-21 16:14:38,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:38,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734787734] [2024-06-21 16:14:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:38,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:39,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734787734] [2024-06-21 16:14:39,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734787734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:39,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:39,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:14:39,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729068426] [2024-06-21 16:14:39,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:39,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:14:39,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:39,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:14:39,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:14:39,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:39,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1514 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-21 16:14:39,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:39,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:39,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:40,271 INFO L124 PetriNetUnfolderBase]: 2672/4121 cut-off events. [2024-06-21 16:14:40,272 INFO L125 PetriNetUnfolderBase]: For 226329/226329 co-relation queries the response was YES. [2024-06-21 16:14:40,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28952 conditions, 4121 events. 2672/4121 cut-off events. For 226329/226329 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 21731 event pairs, 638 based on Foata normal form. 28/4134 useless extension candidates. Maximal degree in co-relation 28890. Up to 3232 conditions per place. [2024-06-21 16:14:40,308 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 124 selfloop transitions, 75 changer transitions 0/210 dead transitions. [2024-06-21 16:14:40,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 210 transitions, 2106 flow [2024-06-21 16:14:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:14:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:14:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-21 16:14:40,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-21 16:14:40,309 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1514 flow. Second operand 11 states and 222 transitions. [2024-06-21 16:14:40,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 210 transitions, 2106 flow [2024-06-21 16:14:40,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 210 transitions, 2010 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:40,464 INFO L231 Difference]: Finished difference. Result has 142 places, 159 transitions, 1627 flow [2024-06-21 16:14:40,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1627, PETRI_PLACES=142, PETRI_TRANSITIONS=159} [2024-06-21 16:14:40,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-21 16:14:40,465 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 159 transitions, 1627 flow [2024-06-21 16:14:40,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-21 16:14:40,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:40,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:40,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:14:40,465 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:40,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:40,466 INFO L85 PathProgramCache]: Analyzing trace with hash 981163660, now seen corresponding path program 3 times [2024-06-21 16:14:40,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:40,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324008169] [2024-06-21 16:14:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:40,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:41,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:41,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324008169] [2024-06-21 16:14:41,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324008169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:41,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:41,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:14:41,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367068289] [2024-06-21 16:14:41,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:41,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:14:41,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:41,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:14:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:14:41,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:41,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 159 transitions, 1627 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-21 16:14:41,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:41,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:41,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:42,294 INFO L124 PetriNetUnfolderBase]: 2730/4229 cut-off events. [2024-06-21 16:14:42,294 INFO L125 PetriNetUnfolderBase]: For 234380/234380 co-relation queries the response was YES. [2024-06-21 16:14:42,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30201 conditions, 4229 events. 2730/4229 cut-off events. For 234380/234380 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22556 event pairs, 638 based on Foata normal form. 16/4230 useless extension candidates. Maximal degree in co-relation 30137. Up to 3192 conditions per place. [2024-06-21 16:14:42,321 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 123 selfloop transitions, 77 changer transitions 0/211 dead transitions. [2024-06-21 16:14:42,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 211 transitions, 2213 flow [2024-06-21 16:14:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:14:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:14:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 16:14:42,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976190476190476 [2024-06-21 16:14:42,322 INFO L175 Difference]: Start difference. First operand has 142 places, 159 transitions, 1627 flow. Second operand 10 states and 209 transitions. [2024-06-21 16:14:42,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 211 transitions, 2213 flow [2024-06-21 16:14:42,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 211 transitions, 2048 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 16:14:42,482 INFO L231 Difference]: Finished difference. Result has 143 places, 160 transitions, 1653 flow [2024-06-21 16:14:42,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1653, PETRI_PLACES=143, PETRI_TRANSITIONS=160} [2024-06-21 16:14:42,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 16:14:42,483 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 160 transitions, 1653 flow [2024-06-21 16:14:42,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-21 16:14:42,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:42,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:42,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:14:42,484 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)] === [2024-06-21 16:14:42,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:42,484 INFO L85 PathProgramCache]: Analyzing trace with hash -646172519, now seen corresponding path program 1 times [2024-06-21 16:14:42,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:42,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641303759] [2024-06-21 16:14:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:42,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:43,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:43,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641303759] [2024-06-21 16:14:43,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641303759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:43,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:43,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:14:43,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236891322] [2024-06-21 16:14:43,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:43,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:14:43,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:43,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:14:43,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:14:43,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:43,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 160 transitions, 1653 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:43,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:43,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:43,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:43,745 INFO L124 PetriNetUnfolderBase]: 3107/4657 cut-off events. [2024-06-21 16:14:43,745 INFO L125 PetriNetUnfolderBase]: For 238461/238463 co-relation queries the response was YES. [2024-06-21 16:14:43,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32564 conditions, 4657 events. 3107/4657 cut-off events. For 238461/238463 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23236 event pairs, 927 based on Foata normal form. 4/4661 useless extension candidates. Maximal degree in co-relation 32499. Up to 4509 conditions per place. [2024-06-21 16:14:43,778 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 154 selfloop transitions, 39 changer transitions 0/196 dead transitions. [2024-06-21 16:14:43,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 196 transitions, 2395 flow [2024-06-21 16:14:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:14:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:14:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 16:14:43,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 16:14:43,779 INFO L175 Difference]: Start difference. First operand has 143 places, 160 transitions, 1653 flow. Second operand 7 states and 130 transitions. [2024-06-21 16:14:43,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 196 transitions, 2395 flow [2024-06-21 16:14:43,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 196 transitions, 2226 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 16:14:43,909 INFO L231 Difference]: Finished difference. Result has 143 places, 172 transitions, 1745 flow [2024-06-21 16:14:43,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1745, PETRI_PLACES=143, PETRI_TRANSITIONS=172} [2024-06-21 16:14:43,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 16:14:43,910 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 172 transitions, 1745 flow [2024-06-21 16:14:43,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:43,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:43,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:43,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:14:43,910 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:43,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:43,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1045777742, now seen corresponding path program 4 times [2024-06-21 16:14:43,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:43,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428203578] [2024-06-21 16:14:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:43,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:44,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428203578] [2024-06-21 16:14:44,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428203578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:44,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:44,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:14:44,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499686123] [2024-06-21 16:14:44,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:44,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:14:44,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:14:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:14:44,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:44,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 172 transitions, 1745 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-21 16:14:44,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:44,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:44,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:45,730 INFO L124 PetriNetUnfolderBase]: 2921/4541 cut-off events. [2024-06-21 16:14:45,730 INFO L125 PetriNetUnfolderBase]: For 272039/272039 co-relation queries the response was YES. [2024-06-21 16:14:45,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33145 conditions, 4541 events. 2921/4541 cut-off events. For 272039/272039 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 24680 event pairs, 559 based on Foata normal form. 16/4555 useless extension candidates. Maximal degree in co-relation 33078. Up to 3456 conditions per place. [2024-06-21 16:14:45,767 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 145 selfloop transitions, 66 changer transitions 0/225 dead transitions. [2024-06-21 16:14:45,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 225 transitions, 2527 flow [2024-06-21 16:14:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:14:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:14:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 16:14:45,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-21 16:14:45,768 INFO L175 Difference]: Start difference. First operand has 143 places, 172 transitions, 1745 flow. Second operand 9 states and 195 transitions. [2024-06-21 16:14:45,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 225 transitions, 2527 flow [2024-06-21 16:14:45,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 225 transitions, 2459 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 16:14:45,955 INFO L231 Difference]: Finished difference. Result has 150 places, 174 transitions, 1877 flow [2024-06-21 16:14:45,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1877, PETRI_PLACES=150, PETRI_TRANSITIONS=174} [2024-06-21 16:14:45,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 16:14:45,955 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 174 transitions, 1877 flow [2024-06-21 16:14:45,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-21 16:14:45,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:45,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:45,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:14:45,956 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:45,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:45,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1045774022, now seen corresponding path program 5 times [2024-06-21 16:14:45,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:45,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436932706] [2024-06-21 16:14:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:45,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:46,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:46,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436932706] [2024-06-21 16:14:46,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436932706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:46,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:46,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:14:46,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51322672] [2024-06-21 16:14:46,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:46,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:14:46,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:14:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:14:46,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:46,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 174 transitions, 1877 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-21 16:14:46,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:46,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:46,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:47,856 INFO L124 PetriNetUnfolderBase]: 3010/4690 cut-off events. [2024-06-21 16:14:47,856 INFO L125 PetriNetUnfolderBase]: For 293409/293409 co-relation queries the response was YES. [2024-06-21 16:14:47,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34534 conditions, 4690 events. 3010/4690 cut-off events. For 293409/293409 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25845 event pairs, 727 based on Foata normal form. 24/4712 useless extension candidates. Maximal degree in co-relation 34465. Up to 3899 conditions per place. [2024-06-21 16:14:47,895 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 148 selfloop transitions, 64 changer transitions 0/226 dead transitions. [2024-06-21 16:14:47,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 226 transitions, 2489 flow [2024-06-21 16:14:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:14:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:14:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 16:14:47,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-21 16:14:47,896 INFO L175 Difference]: Start difference. First operand has 150 places, 174 transitions, 1877 flow. Second operand 10 states and 208 transitions. [2024-06-21 16:14:47,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 226 transitions, 2489 flow [2024-06-21 16:14:48,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 226 transitions, 2390 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:48,133 INFO L231 Difference]: Finished difference. Result has 155 places, 175 transitions, 1948 flow [2024-06-21 16:14:48,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1948, PETRI_PLACES=155, PETRI_TRANSITIONS=175} [2024-06-21 16:14:48,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 16:14:48,133 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 175 transitions, 1948 flow [2024-06-21 16:14:48,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-21 16:14:48,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:48,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:48,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:14:48,134 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:48,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:48,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1040267492, now seen corresponding path program 6 times [2024-06-21 16:14:48,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:48,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857667523] [2024-06-21 16:14:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:48,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:49,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:49,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857667523] [2024-06-21 16:14:49,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857667523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:49,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:49,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:14:49,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117152432] [2024-06-21 16:14:49,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:49,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:14:49,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:49,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:14:49,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:14:49,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:49,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 175 transitions, 1948 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) [2024-06-21 16:14:49,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:49,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:49,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:50,315 INFO L124 PetriNetUnfolderBase]: 3102/4842 cut-off events. [2024-06-21 16:14:50,315 INFO L125 PetriNetUnfolderBase]: For 309024/309024 co-relation queries the response was YES. [2024-06-21 16:14:50,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35849 conditions, 4842 events. 3102/4842 cut-off events. For 309024/309024 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 27043 event pairs, 757 based on Foata normal form. 24/4864 useless extension candidates. Maximal degree in co-relation 35778. Up to 4163 conditions per place. [2024-06-21 16:14:50,355 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 159 selfloop transitions, 47 changer transitions 0/220 dead transitions. [2024-06-21 16:14:50,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 220 transitions, 2530 flow [2024-06-21 16:14:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:14:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:14:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 16:14:50,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-21 16:14:50,356 INFO L175 Difference]: Start difference. First operand has 155 places, 175 transitions, 1948 flow. Second operand 10 states and 199 transitions. [2024-06-21 16:14:50,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 220 transitions, 2530 flow [2024-06-21 16:14:50,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 220 transitions, 2392 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:14:50,534 INFO L231 Difference]: Finished difference. Result has 157 places, 176 transitions, 1948 flow [2024-06-21 16:14:50,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1948, PETRI_PLACES=157, PETRI_TRANSITIONS=176} [2024-06-21 16:14:50,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 16:14:50,534 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 176 transitions, 1948 flow [2024-06-21 16:14:50,535 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) [2024-06-21 16:14:50,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:50,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:50,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:14:50,537 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)] === [2024-06-21 16:14:50,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1117801137, now seen corresponding path program 2 times [2024-06-21 16:14:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:50,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411101753] [2024-06-21 16:14:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:50,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:51,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:51,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411101753] [2024-06-21 16:14:51,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411101753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:51,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:51,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:14:51,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461042398] [2024-06-21 16:14:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:51,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:14:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:14:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:14:51,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:51,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 176 transitions, 1948 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:51,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:51,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:51,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:51,878 INFO L124 PetriNetUnfolderBase]: 3514/5321 cut-off events. [2024-06-21 16:14:51,878 INFO L125 PetriNetUnfolderBase]: For 307343/307345 co-relation queries the response was YES. [2024-06-21 16:14:51,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38313 conditions, 5321 events. 3514/5321 cut-off events. For 307343/307345 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 27973 event pairs, 1059 based on Foata normal form. 4/5325 useless extension candidates. Maximal degree in co-relation 38241. Up to 5162 conditions per place. [2024-06-21 16:14:51,921 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 157 selfloop transitions, 42 changer transitions 0/202 dead transitions. [2024-06-21 16:14:51,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 202 transitions, 2663 flow [2024-06-21 16:14:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:14:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:14:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 16:14:51,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 16:14:51,922 INFO L175 Difference]: Start difference. First operand has 157 places, 176 transitions, 1948 flow. Second operand 7 states and 124 transitions. [2024-06-21 16:14:51,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 202 transitions, 2663 flow [2024-06-21 16:14:52,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 202 transitions, 2557 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 16:14:52,170 INFO L231 Difference]: Finished difference. Result has 157 places, 184 transitions, 2057 flow [2024-06-21 16:14:52,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2057, PETRI_PLACES=157, PETRI_TRANSITIONS=184} [2024-06-21 16:14:52,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 16:14:52,171 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 184 transitions, 2057 flow [2024-06-21 16:14:52,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:52,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:52,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:14:52,171 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:52,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1117800734, now seen corresponding path program 1 times [2024-06-21 16:14:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:52,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634917096] [2024-06-21 16:14:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:52,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:52,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634917096] [2024-06-21 16:14:52,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634917096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:52,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:52,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:14:52,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450252505] [2024-06-21 16:14:52,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:52,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:14:52,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:14:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:14:52,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:52,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 184 transitions, 2057 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:52,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:52,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:52,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:53,547 INFO L124 PetriNetUnfolderBase]: 3409/5217 cut-off events. [2024-06-21 16:14:53,547 INFO L125 PetriNetUnfolderBase]: For 318870/318870 co-relation queries the response was YES. [2024-06-21 16:14:53,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37754 conditions, 5217 events. 3409/5217 cut-off events. For 318870/318870 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 27922 event pairs, 1043 based on Foata normal form. 3/5206 useless extension candidates. Maximal degree in co-relation 37680. Up to 5025 conditions per place. [2024-06-21 16:14:53,591 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 169 selfloop transitions, 23 changer transitions 0/214 dead transitions. [2024-06-21 16:14:53,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 214 transitions, 2671 flow [2024-06-21 16:14:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:14:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:14:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 16:14:53,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 16:14:53,592 INFO L175 Difference]: Start difference. First operand has 157 places, 184 transitions, 2057 flow. Second operand 7 states and 129 transitions. [2024-06-21 16:14:53,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 214 transitions, 2671 flow [2024-06-21 16:14:53,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 214 transitions, 2582 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 16:14:53,848 INFO L231 Difference]: Finished difference. Result has 162 places, 193 transitions, 2134 flow [2024-06-21 16:14:53,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1968, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2134, PETRI_PLACES=162, PETRI_TRANSITIONS=193} [2024-06-21 16:14:53,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 16:14:53,849 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 193 transitions, 2134 flow [2024-06-21 16:14:53,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:53,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:53,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:53,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:14:53,850 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)] === [2024-06-21 16:14:53,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:53,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1237054289, now seen corresponding path program 1 times [2024-06-21 16:14:53,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:53,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815774978] [2024-06-21 16:14:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:53,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:54,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:54,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815774978] [2024-06-21 16:14:54,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815774978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:54,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:54,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:14:54,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077323909] [2024-06-21 16:14:54,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:54,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:14:54,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:14:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:14:54,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:54,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 193 transitions, 2134 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:14:54,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:54,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:54,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:55,786 INFO L124 PetriNetUnfolderBase]: 3443/5271 cut-off events. [2024-06-21 16:14:55,786 INFO L125 PetriNetUnfolderBase]: For 337546/337546 co-relation queries the response was YES. [2024-06-21 16:14:55,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39088 conditions, 5271 events. 3443/5271 cut-off events. For 337546/337546 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 28237 event pairs, 986 based on Foata normal form. 4/5275 useless extension candidates. Maximal degree in co-relation 39012. Up to 4988 conditions per place. [2024-06-21 16:14:55,833 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 186 selfloop transitions, 29 changer transitions 0/229 dead transitions. [2024-06-21 16:14:55,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 229 transitions, 2719 flow [2024-06-21 16:14:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:14:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:14:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:14:55,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:14:55,837 INFO L175 Difference]: Start difference. First operand has 162 places, 193 transitions, 2134 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:14:55,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 229 transitions, 2719 flow [2024-06-21 16:14:56,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 229 transitions, 2675 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 16:14:56,136 INFO L231 Difference]: Finished difference. Result has 170 places, 198 transitions, 2238 flow [2024-06-21 16:14:56,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2238, PETRI_PLACES=170, PETRI_TRANSITIONS=198} [2024-06-21 16:14:56,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 16:14:56,136 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 198 transitions, 2238 flow [2024-06-21 16:14:56,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:14:56,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:56,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:56,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:14:56,137 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)] === [2024-06-21 16:14:56,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:56,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1457259672, now seen corresponding path program 7 times [2024-06-21 16:14:56,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:56,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119978717] [2024-06-21 16:14:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:56,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:57,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119978717] [2024-06-21 16:14:57,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119978717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:57,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:57,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:14:57,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437880112] [2024-06-21 16:14:57,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:57,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:14:57,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:57,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:14:57,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:14:57,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:57,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 198 transitions, 2238 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) [2024-06-21 16:14:57,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:57,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:57,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:58,311 INFO L124 PetriNetUnfolderBase]: 3276/5114 cut-off events. [2024-06-21 16:14:58,311 INFO L125 PetriNetUnfolderBase]: For 371271/371271 co-relation queries the response was YES. [2024-06-21 16:14:58,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39152 conditions, 5114 events. 3276/5114 cut-off events. For 371271/371271 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28754 event pairs, 828 based on Foata normal form. 24/5133 useless extension candidates. Maximal degree in co-relation 39072. Up to 4595 conditions per place. [2024-06-21 16:14:58,357 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 190 selfloop transitions, 33 changer transitions 0/240 dead transitions. [2024-06-21 16:14:58,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 240 transitions, 2848 flow [2024-06-21 16:14:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:14:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:14:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 16:14:58,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 16:14:58,358 INFO L175 Difference]: Start difference. First operand has 170 places, 198 transitions, 2238 flow. Second operand 10 states and 191 transitions. [2024-06-21 16:14:58,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 240 transitions, 2848 flow [2024-06-21 16:14:58,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 240 transitions, 2747 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:58,699 INFO L231 Difference]: Finished difference. Result has 174 places, 199 transitions, 2249 flow [2024-06-21 16:14:58,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2249, PETRI_PLACES=174, PETRI_TRANSITIONS=199} [2024-06-21 16:14:58,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 16:14:58,699 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 199 transitions, 2249 flow [2024-06-21 16:14:58,699 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) [2024-06-21 16:14:58,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:58,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:58,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:14:58,699 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)] === [2024-06-21 16:14:58,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash -6266743, now seen corresponding path program 2 times [2024-06-21 16:14:58,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:58,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133162154] [2024-06-21 16:14:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:58,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:59,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:59,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133162154] [2024-06-21 16:14:59,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133162154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:59,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:59,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:14:59,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207067329] [2024-06-21 16:14:59,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:59,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:14:59,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:59,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:14:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:14:59,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:59,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 199 transitions, 2249 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:14:59,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:59,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:59,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:00,598 INFO L124 PetriNetUnfolderBase]: 3569/5477 cut-off events. [2024-06-21 16:15:00,598 INFO L125 PetriNetUnfolderBase]: For 372680/372680 co-relation queries the response was YES. [2024-06-21 16:15:00,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41420 conditions, 5477 events. 3569/5477 cut-off events. For 372680/372680 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 29707 event pairs, 1016 based on Foata normal form. 4/5481 useless extension candidates. Maximal degree in co-relation 41339. Up to 5230 conditions per place. [2024-06-21 16:15:00,731 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 196 selfloop transitions, 24 changer transitions 0/234 dead transitions. [2024-06-21 16:15:00,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 234 transitions, 2856 flow [2024-06-21 16:15:00,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:15:00,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 16:15:00,733 INFO L175 Difference]: Start difference. First operand has 174 places, 199 transitions, 2249 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:15:00,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 234 transitions, 2856 flow [2024-06-21 16:15:01,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 234 transitions, 2772 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 16:15:01,093 INFO L231 Difference]: Finished difference. Result has 176 places, 204 transitions, 2323 flow [2024-06-21 16:15:01,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2323, PETRI_PLACES=176, PETRI_TRANSITIONS=204} [2024-06-21 16:15:01,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 16:15:01,094 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 204 transitions, 2323 flow [2024-06-21 16:15:01,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:15:01,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:01,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:01,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:15:01,094 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)] === [2024-06-21 16:15:01,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:01,095 INFO L85 PathProgramCache]: Analyzing trace with hash -67739270, now seen corresponding path program 8 times [2024-06-21 16:15:01,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:01,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126382417] [2024-06-21 16:15:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:02,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:02,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126382417] [2024-06-21 16:15:02,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126382417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:02,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:02,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:15:02,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064911206] [2024-06-21 16:15:02,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:02,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:15:02,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:02,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:15:02,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:15:02,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:15:02,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 204 transitions, 2323 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) [2024-06-21 16:15:02,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:02,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:15:02,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:03,232 INFO L124 PetriNetUnfolderBase]: 3221/5026 cut-off events. [2024-06-21 16:15:03,232 INFO L125 PetriNetUnfolderBase]: For 375795/375795 co-relation queries the response was YES. [2024-06-21 16:15:03,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38177 conditions, 5026 events. 3221/5026 cut-off events. For 375795/375795 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28111 event pairs, 845 based on Foata normal form. 24/5045 useless extension candidates. Maximal degree in co-relation 38094. Up to 4523 conditions per place. [2024-06-21 16:15:03,277 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 198 selfloop transitions, 28 changer transitions 0/244 dead transitions. [2024-06-21 16:15:03,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 244 transitions, 2899 flow [2024-06-21 16:15:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:15:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:15:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 16:15:03,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 16:15:03,280 INFO L175 Difference]: Start difference. First operand has 176 places, 204 transitions, 2323 flow. Second operand 10 states and 188 transitions. [2024-06-21 16:15:03,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 244 transitions, 2899 flow [2024-06-21 16:15:03,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 244 transitions, 2786 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:03,640 INFO L231 Difference]: Finished difference. Result has 180 places, 204 transitions, 2274 flow [2024-06-21 16:15:03,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2274, PETRI_PLACES=180, PETRI_TRANSITIONS=204} [2024-06-21 16:15:03,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 16:15:03,640 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 204 transitions, 2274 flow [2024-06-21 16:15:03,641 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) [2024-06-21 16:15:03,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:03,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:03,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:15:03,641 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)] === [2024-06-21 16:15:03,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:03,641 INFO L85 PathProgramCache]: Analyzing trace with hash -60373949, now seen corresponding path program 3 times [2024-06-21 16:15:03,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:03,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150778294] [2024-06-21 16:15:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:03,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:04,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:04,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150778294] [2024-06-21 16:15:04,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150778294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:04,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:04,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:15:04,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499673621] [2024-06-21 16:15:04,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:04,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:15:04,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:15:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:15:04,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:04,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 204 transitions, 2274 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:15:04,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:04,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:04,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:05,686 INFO L124 PetriNetUnfolderBase]: 3509/5385 cut-off events. [2024-06-21 16:15:05,686 INFO L125 PetriNetUnfolderBase]: For 367675/367675 co-relation queries the response was YES. [2024-06-21 16:15:05,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40029 conditions, 5385 events. 3509/5385 cut-off events. For 367675/367675 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 29094 event pairs, 969 based on Foata normal form. 4/5389 useless extension candidates. Maximal degree in co-relation 39945. Up to 5165 conditions per place. [2024-06-21 16:15:05,738 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 202 selfloop transitions, 19 changer transitions 0/235 dead transitions. [2024-06-21 16:15:05,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 235 transitions, 2850 flow [2024-06-21 16:15:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 16:15:05,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 16:15:05,739 INFO L175 Difference]: Start difference. First operand has 180 places, 204 transitions, 2274 flow. Second operand 9 states and 157 transitions. [2024-06-21 16:15:05,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 235 transitions, 2850 flow [2024-06-21 16:15:06,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 235 transitions, 2768 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:15:06,095 INFO L231 Difference]: Finished difference. Result has 180 places, 206 transitions, 2301 flow [2024-06-21 16:15:06,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2301, PETRI_PLACES=180, PETRI_TRANSITIONS=206} [2024-06-21 16:15:06,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 16:15:06,096 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 206 transitions, 2301 flow [2024-06-21 16:15:06,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:15:06,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:06,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:06,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:15:06,096 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)] === [2024-06-21 16:15:06,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash 198499921, now seen corresponding path program 4 times [2024-06-21 16:15:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:06,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570010977] [2024-06-21 16:15:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:06,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:07,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:07,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570010977] [2024-06-21 16:15:07,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570010977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:07,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:07,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:15:07,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574613004] [2024-06-21 16:15:07,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:07,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:15:07,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:15:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:15:07,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:07,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 206 transitions, 2301 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:15:07,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:07,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:07,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:08,176 INFO L124 PetriNetUnfolderBase]: 3526/5412 cut-off events. [2024-06-21 16:15:08,176 INFO L125 PetriNetUnfolderBase]: For 382144/382144 co-relation queries the response was YES. [2024-06-21 16:15:08,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40405 conditions, 5412 events. 3526/5412 cut-off events. For 382144/382144 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29239 event pairs, 921 based on Foata normal form. 4/5416 useless extension candidates. Maximal degree in co-relation 40320. Up to 5178 conditions per place. [2024-06-21 16:15:08,233 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 20 changer transitions 0/237 dead transitions. [2024-06-21 16:15:08,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 237 transitions, 2871 flow [2024-06-21 16:15:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:08,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 16:15:08,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 16:15:08,234 INFO L175 Difference]: Start difference. First operand has 180 places, 206 transitions, 2301 flow. Second operand 9 states and 157 transitions. [2024-06-21 16:15:08,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 237 transitions, 2871 flow [2024-06-21 16:15:08,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 237 transitions, 2778 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 16:15:08,640 INFO L231 Difference]: Finished difference. Result has 182 places, 208 transitions, 2311 flow [2024-06-21 16:15:08,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2208, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2311, PETRI_PLACES=182, PETRI_TRANSITIONS=208} [2024-06-21 16:15:08,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 16:15:08,641 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 208 transitions, 2311 flow [2024-06-21 16:15:08,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:15:08,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:08,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:08,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:15:08,641 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)] === [2024-06-21 16:15:08,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash 198173491, now seen corresponding path program 5 times [2024-06-21 16:15:08,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:08,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210537259] [2024-06-21 16:15:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:08,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:09,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:09,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210537259] [2024-06-21 16:15:09,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210537259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:09,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:09,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:15:09,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354996915] [2024-06-21 16:15:09,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:09,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:15:09,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:15:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:15:09,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:09,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 208 transitions, 2311 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:15:09,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:09,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:09,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:10,740 INFO L124 PetriNetUnfolderBase]: 3518/5400 cut-off events. [2024-06-21 16:15:10,740 INFO L125 PetriNetUnfolderBase]: For 393450/393450 co-relation queries the response was YES. [2024-06-21 16:15:10,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40431 conditions, 5400 events. 3518/5400 cut-off events. For 393450/393450 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29215 event pairs, 958 based on Foata normal form. 4/5404 useless extension candidates. Maximal degree in co-relation 40345. Up to 5144 conditions per place. [2024-06-21 16:15:10,795 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 199 selfloop transitions, 26 changer transitions 0/239 dead transitions. [2024-06-21 16:15:10,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 239 transitions, 2891 flow [2024-06-21 16:15:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:15:10,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 16:15:10,796 INFO L175 Difference]: Start difference. First operand has 182 places, 208 transitions, 2311 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:15:10,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 239 transitions, 2891 flow [2024-06-21 16:15:11,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 239 transitions, 2806 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 16:15:11,197 INFO L231 Difference]: Finished difference. Result has 184 places, 210 transitions, 2348 flow [2024-06-21 16:15:11,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2348, PETRI_PLACES=184, PETRI_TRANSITIONS=210} [2024-06-21 16:15:11,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 16:15:11,197 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 210 transitions, 2348 flow [2024-06-21 16:15:11,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:15:11,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:11,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:11,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:15:11,198 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)] === [2024-06-21 16:15:11,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:11,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1798611066, now seen corresponding path program 1 times [2024-06-21 16:15:11,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:11,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739626868] [2024-06-21 16:15:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:11,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:12,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:12,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739626868] [2024-06-21 16:15:12,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739626868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:12,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:12,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:15:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250625790] [2024-06-21 16:15:12,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:12,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:15:12,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:15:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:15:12,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:12,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 210 transitions, 2348 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:15:12,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:12,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:12,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:13,282 INFO L124 PetriNetUnfolderBase]: 3535/5425 cut-off events. [2024-06-21 16:15:13,283 INFO L125 PetriNetUnfolderBase]: For 403546/403546 co-relation queries the response was YES. [2024-06-21 16:15:13,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40819 conditions, 5425 events. 3535/5425 cut-off events. For 403546/403546 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29398 event pairs, 956 based on Foata normal form. 2/5427 useless extension candidates. Maximal degree in co-relation 40732. Up to 5173 conditions per place. [2024-06-21 16:15:13,340 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 200 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2024-06-21 16:15:13,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 242 transitions, 2913 flow [2024-06-21 16:15:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:13,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:15:13,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 16:15:13,341 INFO L175 Difference]: Start difference. First operand has 184 places, 210 transitions, 2348 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:15:13,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 242 transitions, 2913 flow [2024-06-21 16:15:13,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 242 transitions, 2805 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 16:15:13,737 INFO L231 Difference]: Finished difference. Result has 186 places, 213 transitions, 2347 flow [2024-06-21 16:15:13,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2347, PETRI_PLACES=186, PETRI_TRANSITIONS=213} [2024-06-21 16:15:13,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 16:15:13,737 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 213 transitions, 2347 flow [2024-06-21 16:15:13,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-21 16:15:13,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:13,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:13,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:15:13,738 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:13,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:13,738 INFO L85 PathProgramCache]: Analyzing trace with hash -108337709, now seen corresponding path program 3 times [2024-06-21 16:15:13,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:13,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455755498] [2024-06-21 16:15:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:13,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:14,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:14,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455755498] [2024-06-21 16:15:14,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455755498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:14,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:14,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:14,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892027615] [2024-06-21 16:15:14,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:14,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:14,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:14,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:14,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 213 transitions, 2347 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:14,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:14,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:14,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:15,256 INFO L124 PetriNetUnfolderBase]: 3650/5540 cut-off events. [2024-06-21 16:15:15,256 INFO L125 PetriNetUnfolderBase]: For 413953/413955 co-relation queries the response was YES. [2024-06-21 16:15:15,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41375 conditions, 5540 events. 3650/5540 cut-off events. For 413953/413955 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29518 event pairs, 1006 based on Foata normal form. 4/5544 useless extension candidates. Maximal degree in co-relation 41287. Up to 5487 conditions per place. [2024-06-21 16:15:15,312 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 196 selfloop transitions, 25 changer transitions 0/224 dead transitions. [2024-06-21 16:15:15,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 224 transitions, 2919 flow [2024-06-21 16:15:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 16:15:15,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-21 16:15:15,313 INFO L175 Difference]: Start difference. First operand has 186 places, 213 transitions, 2347 flow. Second operand 7 states and 114 transitions. [2024-06-21 16:15:15,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 224 transitions, 2919 flow [2024-06-21 16:15:15,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 224 transitions, 2802 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 16:15:15,715 INFO L231 Difference]: Finished difference. Result has 185 places, 213 transitions, 2288 flow [2024-06-21 16:15:15,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2288, PETRI_PLACES=185, PETRI_TRANSITIONS=213} [2024-06-21 16:15:15,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 16:15:15,716 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 213 transitions, 2288 flow [2024-06-21 16:15:15,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:15,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:15,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:15,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:15:15,716 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:15,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1595268888, now seen corresponding path program 2 times [2024-06-21 16:15:15,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:15,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013626152] [2024-06-21 16:15:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:15,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:16,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013626152] [2024-06-21 16:15:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013626152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:16,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:16,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:16,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131498170] [2024-06-21 16:15:16,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:16,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:16,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:16,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:16,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 213 transitions, 2288 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:16,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:16,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:16,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:17,224 INFO L124 PetriNetUnfolderBase]: 3529/5414 cut-off events. [2024-06-21 16:15:17,224 INFO L125 PetriNetUnfolderBase]: For 428540/428540 co-relation queries the response was YES. [2024-06-21 16:15:17,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40794 conditions, 5414 events. 3529/5414 cut-off events. For 428540/428540 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 29327 event pairs, 1014 based on Foata normal form. 3/5403 useless extension candidates. Maximal degree in co-relation 40705. Up to 5242 conditions per place. [2024-06-21 16:15:17,274 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 19 changer transitions 0/231 dead transitions. [2024-06-21 16:15:17,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 231 transitions, 2896 flow [2024-06-21 16:15:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 16:15:17,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 16:15:17,275 INFO L175 Difference]: Start difference. First operand has 185 places, 213 transitions, 2288 flow. Second operand 7 states and 121 transitions. [2024-06-21 16:15:17,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 231 transitions, 2896 flow [2024-06-21 16:15:17,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 231 transitions, 2766 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 16:15:17,675 INFO L231 Difference]: Finished difference. Result has 184 places, 216 transitions, 2248 flow [2024-06-21 16:15:17,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2248, PETRI_PLACES=184, PETRI_TRANSITIONS=216} [2024-06-21 16:15:17,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 16:15:17,676 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 216 transitions, 2248 flow [2024-06-21 16:15:17,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:17,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:17,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:17,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:15:17,676 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:17,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash -733570304, now seen corresponding path program 3 times [2024-06-21 16:15:17,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:17,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892559086] [2024-06-21 16:15:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:17,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:18,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:18,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892559086] [2024-06-21 16:15:18,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892559086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:18,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:18,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:18,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552484309] [2024-06-21 16:15:18,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:18,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:18,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:18,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:18,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:18,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 216 transitions, 2248 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:18,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:18,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:18,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:19,166 INFO L124 PetriNetUnfolderBase]: 3520/5402 cut-off events. [2024-06-21 16:15:19,166 INFO L125 PetriNetUnfolderBase]: For 438329/438329 co-relation queries the response was YES. [2024-06-21 16:15:19,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40649 conditions, 5402 events. 3520/5402 cut-off events. For 438329/438329 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29263 event pairs, 1012 based on Foata normal form. 3/5391 useless extension candidates. Maximal degree in co-relation 40561. Up to 5247 conditions per place. [2024-06-21 16:15:19,211 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 14 changer transitions 0/228 dead transitions. [2024-06-21 16:15:19,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2690 flow [2024-06-21 16:15:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 16:15:19,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 16:15:19,213 INFO L175 Difference]: Start difference. First operand has 184 places, 216 transitions, 2248 flow. Second operand 7 states and 116 transitions. [2024-06-21 16:15:19,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2690 flow [2024-06-21 16:15:19,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 228 transitions, 2588 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 16:15:19,611 INFO L231 Difference]: Finished difference. Result has 186 places, 216 transitions, 2180 flow [2024-06-21 16:15:19,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2180, PETRI_PLACES=186, PETRI_TRANSITIONS=216} [2024-06-21 16:15:19,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 16:15:19,611 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 216 transitions, 2180 flow [2024-06-21 16:15:19,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:19,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:19,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:19,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:15:19,612 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:19,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash -940634649, now seen corresponding path program 1 times [2024-06-21 16:15:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:19,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651578716] [2024-06-21 16:15:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:20,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:20,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651578716] [2024-06-21 16:15:20,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651578716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:20,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:20,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:20,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318816993] [2024-06-21 16:15:20,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:20,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:20,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:20,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:20,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:20,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 216 transitions, 2180 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:20,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:20,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:20,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:21,337 INFO L124 PetriNetUnfolderBase]: 3661/5555 cut-off events. [2024-06-21 16:15:21,338 INFO L125 PetriNetUnfolderBase]: For 450126/450126 co-relation queries the response was YES. [2024-06-21 16:15:21,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41687 conditions, 5555 events. 3661/5555 cut-off events. For 450126/450126 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29526 event pairs, 1027 based on Foata normal form. 1/5556 useless extension candidates. Maximal degree in co-relation 41599. Up to 5507 conditions per place. [2024-06-21 16:15:21,382 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 212 selfloop transitions, 24 changer transitions 0/239 dead transitions. [2024-06-21 16:15:21,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 239 transitions, 2868 flow [2024-06-21 16:15:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 16:15:21,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 16:15:21,383 INFO L175 Difference]: Start difference. First operand has 186 places, 216 transitions, 2180 flow. Second operand 7 states and 118 transitions. [2024-06-21 16:15:21,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 239 transitions, 2868 flow [2024-06-21 16:15:21,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 239 transitions, 2826 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:21,698 INFO L231 Difference]: Finished difference. Result has 187 places, 222 transitions, 2262 flow [2024-06-21 16:15:21,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2262, PETRI_PLACES=187, PETRI_TRANSITIONS=222} [2024-06-21 16:15:21,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 16:15:21,699 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 222 transitions, 2262 flow [2024-06-21 16:15:21,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:21,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:21,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:21,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:15:21,700 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:21,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:21,700 INFO L85 PathProgramCache]: Analyzing trace with hash -940484702, now seen corresponding path program 1 times [2024-06-21 16:15:21,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:21,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83612915] [2024-06-21 16:15:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:21,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:22,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:22,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83612915] [2024-06-21 16:15:22,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83612915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:22,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:22,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:22,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705932518] [2024-06-21 16:15:22,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:22,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:22,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:22,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:22,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:22,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:22,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 222 transitions, 2262 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:22,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:22,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:22,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:23,370 INFO L124 PetriNetUnfolderBase]: 3676/5576 cut-off events. [2024-06-21 16:15:23,370 INFO L125 PetriNetUnfolderBase]: For 470056/470056 co-relation queries the response was YES. [2024-06-21 16:15:23,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42555 conditions, 5576 events. 3676/5576 cut-off events. For 470056/470056 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29657 event pairs, 1011 based on Foata normal form. 3/5579 useless extension candidates. Maximal degree in co-relation 42466. Up to 5508 conditions per place. [2024-06-21 16:15:23,519 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 219 selfloop transitions, 25 changer transitions 0/247 dead transitions. [2024-06-21 16:15:23,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 247 transitions, 2986 flow [2024-06-21 16:15:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:23,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:15:23,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 16:15:23,520 INFO L175 Difference]: Start difference. First operand has 187 places, 222 transitions, 2262 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:15:23,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 247 transitions, 2986 flow [2024-06-21 16:15:23,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 247 transitions, 2928 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 16:15:23,866 INFO L231 Difference]: Finished difference. Result has 191 places, 228 transitions, 2342 flow [2024-06-21 16:15:23,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2342, PETRI_PLACES=191, PETRI_TRANSITIONS=228} [2024-06-21 16:15:23,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 16:15:23,866 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 228 transitions, 2342 flow [2024-06-21 16:15:23,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:23,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:23,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:23,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:15:23,867 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:23,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash -741183129, now seen corresponding path program 2 times [2024-06-21 16:15:23,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:23,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822627293] [2024-06-21 16:15:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:23,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:24,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:24,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822627293] [2024-06-21 16:15:24,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822627293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:24,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:24,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:24,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73575729] [2024-06-21 16:15:24,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:24,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:24,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:24,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:24,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:24,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 228 transitions, 2342 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:24,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:24,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:24,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:25,491 INFO L124 PetriNetUnfolderBase]: 3681/5583 cut-off events. [2024-06-21 16:15:25,492 INFO L125 PetriNetUnfolderBase]: For 482290/482290 co-relation queries the response was YES. [2024-06-21 16:15:25,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42966 conditions, 5583 events. 3681/5583 cut-off events. For 482290/482290 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29721 event pairs, 1011 based on Foata normal form. 1/5584 useless extension candidates. Maximal degree in co-relation 42875. Up to 5534 conditions per place. [2024-06-21 16:15:25,552 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 26 changer transitions 0/245 dead transitions. [2024-06-21 16:15:25,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 245 transitions, 3000 flow [2024-06-21 16:15:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 16:15:25,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 16:15:25,553 INFO L175 Difference]: Start difference. First operand has 191 places, 228 transitions, 2342 flow. Second operand 7 states and 116 transitions. [2024-06-21 16:15:25,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 245 transitions, 3000 flow [2024-06-21 16:15:26,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 245 transitions, 2950 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 16:15:26,064 INFO L231 Difference]: Finished difference. Result has 195 places, 231 transitions, 2376 flow [2024-06-21 16:15:26,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2376, PETRI_PLACES=195, PETRI_TRANSITIONS=231} [2024-06-21 16:15:26,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 16:15:26,065 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 231 transitions, 2376 flow [2024-06-21 16:15:26,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:26,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:26,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:26,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:15:26,065 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:26,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:26,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1040971776, now seen corresponding path program 2 times [2024-06-21 16:15:26,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:26,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081979772] [2024-06-21 16:15:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:26,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:26,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:26,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081979772] [2024-06-21 16:15:26,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081979772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:26,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:26,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:26,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177449551] [2024-06-21 16:15:26,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:26,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:26,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:26,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:26,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:26,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 231 transitions, 2376 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:26,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:26,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:26,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:27,690 INFO L124 PetriNetUnfolderBase]: 3696/5605 cut-off events. [2024-06-21 16:15:27,690 INFO L125 PetriNetUnfolderBase]: For 501264/501266 co-relation queries the response was YES. [2024-06-21 16:15:27,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43360 conditions, 5605 events. 3696/5605 cut-off events. For 501264/501266 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29856 event pairs, 1011 based on Foata normal form. 5/5610 useless extension candidates. Maximal degree in co-relation 43267. Up to 5529 conditions per place. [2024-06-21 16:15:27,746 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 220 selfloop transitions, 28 changer transitions 0/251 dead transitions. [2024-06-21 16:15:27,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 251 transitions, 3074 flow [2024-06-21 16:15:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 16:15:27,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:15:27,747 INFO L175 Difference]: Start difference. First operand has 195 places, 231 transitions, 2376 flow. Second operand 7 states and 119 transitions. [2024-06-21 16:15:27,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 251 transitions, 3074 flow [2024-06-21 16:15:28,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 251 transitions, 3024 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:28,211 INFO L231 Difference]: Finished difference. Result has 198 places, 234 transitions, 2430 flow [2024-06-21 16:15:28,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2430, PETRI_PLACES=198, PETRI_TRANSITIONS=234} [2024-06-21 16:15:28,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 16:15:28,212 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 234 transitions, 2430 flow [2024-06-21 16:15:28,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:28,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:28,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:28,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:15:28,212 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:28,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:28,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1595084593, now seen corresponding path program 3 times [2024-06-21 16:15:28,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:28,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492390782] [2024-06-21 16:15:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:28,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:28,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:28,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492390782] [2024-06-21 16:15:28,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492390782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:28,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:28,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:28,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356364260] [2024-06-21 16:15:28,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:28,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:28,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:28,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:28,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:28,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:28,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 234 transitions, 2430 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:28,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:28,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:28,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:29,944 INFO L124 PetriNetUnfolderBase]: 3693/5602 cut-off events. [2024-06-21 16:15:29,944 INFO L125 PetriNetUnfolderBase]: For 511999/512001 co-relation queries the response was YES. [2024-06-21 16:15:29,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43589 conditions, 5602 events. 3693/5602 cut-off events. For 511999/512001 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29837 event pairs, 1018 based on Foata normal form. 3/5605 useless extension candidates. Maximal degree in co-relation 43495. Up to 5552 conditions per place. [2024-06-21 16:15:30,003 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 215 selfloop transitions, 26 changer transitions 0/244 dead transitions. [2024-06-21 16:15:30,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 244 transitions, 2936 flow [2024-06-21 16:15:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 16:15:30,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 16:15:30,004 INFO L175 Difference]: Start difference. First operand has 198 places, 234 transitions, 2430 flow. Second operand 7 states and 112 transitions. [2024-06-21 16:15:30,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 244 transitions, 2936 flow [2024-06-21 16:15:30,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 244 transitions, 2834 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:15:30,449 INFO L231 Difference]: Finished difference. Result has 200 places, 234 transitions, 2386 flow [2024-06-21 16:15:30,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=200, PETRI_TRANSITIONS=234} [2024-06-21 16:15:30,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 16:15:30,450 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 234 transitions, 2386 flow [2024-06-21 16:15:30,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:30,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:30,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:30,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:15:30,450 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:30,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash -934913072, now seen corresponding path program 3 times [2024-06-21 16:15:30,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:30,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111359009] [2024-06-21 16:15:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:30,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:31,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:31,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111359009] [2024-06-21 16:15:31,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111359009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:31,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:31,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:31,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236240358] [2024-06-21 16:15:31,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:31,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:31,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:31,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:31,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 234 transitions, 2386 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:31,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:31,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:31,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:32,122 INFO L124 PetriNetUnfolderBase]: 3684/5589 cut-off events. [2024-06-21 16:15:32,122 INFO L125 PetriNetUnfolderBase]: For 524707/524709 co-relation queries the response was YES. [2024-06-21 16:15:32,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43457 conditions, 5589 events. 3684/5589 cut-off events. For 524707/524709 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29785 event pairs, 1024 based on Foata normal form. 5/5594 useless extension candidates. Maximal degree in co-relation 43362. Up to 5518 conditions per place. [2024-06-21 16:15:32,182 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 29 changer transitions 0/248 dead transitions. [2024-06-21 16:15:32,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 248 transitions, 2912 flow [2024-06-21 16:15:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 16:15:32,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 16:15:32,183 INFO L175 Difference]: Start difference. First operand has 200 places, 234 transitions, 2386 flow. Second operand 7 states and 115 transitions. [2024-06-21 16:15:32,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 248 transitions, 2912 flow [2024-06-21 16:15:32,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 248 transitions, 2814 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:15:32,678 INFO L231 Difference]: Finished difference. Result has 199 places, 234 transitions, 2353 flow [2024-06-21 16:15:32,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2353, PETRI_PLACES=199, PETRI_TRANSITIONS=234} [2024-06-21 16:15:32,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 16:15:32,678 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 234 transitions, 2353 flow [2024-06-21 16:15:32,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:32,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:32,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:32,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:15:32,679 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:32,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:32,679 INFO L85 PathProgramCache]: Analyzing trace with hash -302571696, now seen corresponding path program 1 times [2024-06-21 16:15:32,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:32,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982934667] [2024-06-21 16:15:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:32,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:33,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:33,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982934667] [2024-06-21 16:15:33,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982934667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:33,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:33,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:33,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626704900] [2024-06-21 16:15:33,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:33,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:33,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:33,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:33,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 234 transitions, 2353 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:33,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:33,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:33,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:34,525 INFO L124 PetriNetUnfolderBase]: 3702/5614 cut-off events. [2024-06-21 16:15:34,525 INFO L125 PetriNetUnfolderBase]: For 540593/540595 co-relation queries the response was YES. [2024-06-21 16:15:34,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43910 conditions, 5614 events. 3702/5614 cut-off events. For 540593/540595 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29962 event pairs, 1027 based on Foata normal form. 4/5618 useless extension candidates. Maximal degree in co-relation 43815. Up to 5410 conditions per place. [2024-06-21 16:15:34,576 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 212 selfloop transitions, 58 changer transitions 0/273 dead transitions. [2024-06-21 16:15:34,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 273 transitions, 3335 flow [2024-06-21 16:15:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:15:34,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 16:15:34,577 INFO L175 Difference]: Start difference. First operand has 199 places, 234 transitions, 2353 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:15:34,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 273 transitions, 3335 flow [2024-06-21 16:15:35,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 273 transitions, 3265 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:35,062 INFO L231 Difference]: Finished difference. Result has 201 places, 242 transitions, 2534 flow [2024-06-21 16:15:35,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2534, PETRI_PLACES=201, PETRI_TRANSITIONS=242} [2024-06-21 16:15:35,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 16:15:35,062 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 242 transitions, 2534 flow [2024-06-21 16:15:35,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:35,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:35,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:35,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:15:35,062 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)] === [2024-06-21 16:15:35,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash -302272794, now seen corresponding path program 1 times [2024-06-21 16:15:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:35,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644770093] [2024-06-21 16:15:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:35,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:35,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:35,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644770093] [2024-06-21 16:15:35,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644770093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:35,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:35,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:35,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570017070] [2024-06-21 16:15:35,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:35,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:35,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:35,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:35,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 242 transitions, 2534 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:35,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:35,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:35,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:36,784 INFO L124 PetriNetUnfolderBase]: 3804/5755 cut-off events. [2024-06-21 16:15:36,785 INFO L125 PetriNetUnfolderBase]: For 582606/582608 co-relation queries the response was YES. [2024-06-21 16:15:36,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46266 conditions, 5755 events. 3804/5755 cut-off events. For 582606/582608 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30787 event pairs, 1041 based on Foata normal form. 8/5763 useless extension candidates. Maximal degree in co-relation 46170. Up to 5406 conditions per place. [2024-06-21 16:15:36,853 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 224 selfloop transitions, 65 changer transitions 0/292 dead transitions. [2024-06-21 16:15:36,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 292 transitions, 3666 flow [2024-06-21 16:15:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:15:36,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:15:36,854 INFO L175 Difference]: Start difference. First operand has 201 places, 242 transitions, 2534 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:15:36,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 292 transitions, 3666 flow [2024-06-21 16:15:37,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 292 transitions, 3529 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:37,495 INFO L231 Difference]: Finished difference. Result has 207 places, 261 transitions, 2841 flow [2024-06-21 16:15:37,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2841, PETRI_PLACES=207, PETRI_TRANSITIONS=261} [2024-06-21 16:15:37,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 16:15:37,496 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 261 transitions, 2841 flow [2024-06-21 16:15:37,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:37,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:37,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:37,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:15:37,497 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)] === [2024-06-21 16:15:37,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:37,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1443489094, now seen corresponding path program 2 times [2024-06-21 16:15:37,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:37,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392922473] [2024-06-21 16:15:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:37,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:38,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:38,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392922473] [2024-06-21 16:15:38,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392922473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:38,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:38,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:38,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302843630] [2024-06-21 16:15:38,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:38,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:38,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:38,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:38,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 261 transitions, 2841 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:38,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:38,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:38,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:39,316 INFO L124 PetriNetUnfolderBase]: 3814/5769 cut-off events. [2024-06-21 16:15:39,316 INFO L125 PetriNetUnfolderBase]: For 598468/598470 co-relation queries the response was YES. [2024-06-21 16:15:39,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47714 conditions, 5769 events. 3814/5769 cut-off events. For 598468/598470 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30850 event pairs, 1031 based on Foata normal form. 4/5773 useless extension candidates. Maximal degree in co-relation 47614. Up to 5607 conditions per place. [2024-06-21 16:15:39,377 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 51 changer transitions 0/289 dead transitions. [2024-06-21 16:15:39,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 289 transitions, 3645 flow [2024-06-21 16:15:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:15:39,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 16:15:39,378 INFO L175 Difference]: Start difference. First operand has 207 places, 261 transitions, 2841 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:15:39,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 289 transitions, 3645 flow [2024-06-21 16:15:39,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 289 transitions, 3564 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 16:15:40,002 INFO L231 Difference]: Finished difference. Result has 213 places, 265 transitions, 2923 flow [2024-06-21 16:15:40,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2923, PETRI_PLACES=213, PETRI_TRANSITIONS=265} [2024-06-21 16:15:40,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 16:15:40,003 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 265 transitions, 2923 flow [2024-06-21 16:15:40,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:40,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:40,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:40,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:15:40,004 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)] === [2024-06-21 16:15:40,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:40,004 INFO L85 PathProgramCache]: Analyzing trace with hash -292329358, now seen corresponding path program 1 times [2024-06-21 16:15:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:40,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521468202] [2024-06-21 16:15:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:40,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:40,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:40,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521468202] [2024-06-21 16:15:40,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521468202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:40,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:40,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:40,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785331477] [2024-06-21 16:15:40,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:40,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:40,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:40,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 265 transitions, 2923 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:40,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:40,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:40,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:41,619 INFO L124 PetriNetUnfolderBase]: 3840/5805 cut-off events. [2024-06-21 16:15:41,619 INFO L125 PetriNetUnfolderBase]: For 617478/617480 co-relation queries the response was YES. [2024-06-21 16:15:41,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48277 conditions, 5805 events. 3840/5805 cut-off events. For 617478/617480 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 31026 event pairs, 1045 based on Foata normal form. 4/5809 useless extension candidates. Maximal degree in co-relation 48174. Up to 5635 conditions per place. [2024-06-21 16:15:41,690 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 54 changer transitions 0/296 dead transitions. [2024-06-21 16:15:41,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 296 transitions, 3994 flow [2024-06-21 16:15:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 16:15:41,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 16:15:41,692 INFO L175 Difference]: Start difference. First operand has 213 places, 265 transitions, 2923 flow. Second operand 7 states and 127 transitions. [2024-06-21 16:15:41,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 296 transitions, 3994 flow [2024-06-21 16:15:42,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 296 transitions, 3847 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:42,234 INFO L231 Difference]: Finished difference. Result has 215 places, 275 transitions, 3091 flow [2024-06-21 16:15:42,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3091, PETRI_PLACES=215, PETRI_TRANSITIONS=275} [2024-06-21 16:15:42,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 16:15:42,235 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 275 transitions, 3091 flow [2024-06-21 16:15:42,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:42,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:42,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:42,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:15:42,235 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)] === [2024-06-21 16:15:42,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1453670052, now seen corresponding path program 2 times [2024-06-21 16:15:42,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:42,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158461443] [2024-06-21 16:15:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:42,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:42,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:42,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158461443] [2024-06-21 16:15:42,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158461443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:42,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:42,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124496700] [2024-06-21 16:15:42,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:42,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:42,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:42,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:42,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:42,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:42,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 275 transitions, 3091 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:42,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:42,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:42,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:43,862 INFO L124 PetriNetUnfolderBase]: 3834/5797 cut-off events. [2024-06-21 16:15:43,863 INFO L125 PetriNetUnfolderBase]: For 630629/630631 co-relation queries the response was YES. [2024-06-21 16:15:43,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48371 conditions, 5797 events. 3834/5797 cut-off events. For 630629/630631 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30972 event pairs, 1041 based on Foata normal form. 4/5801 useless extension candidates. Maximal degree in co-relation 48266. Up to 5630 conditions per place. [2024-06-21 16:15:43,929 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 50 changer transitions 0/293 dead transitions. [2024-06-21 16:15:43,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 293 transitions, 3975 flow [2024-06-21 16:15:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 16:15:43,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 16:15:43,930 INFO L175 Difference]: Start difference. First operand has 215 places, 275 transitions, 3091 flow. Second operand 7 states and 124 transitions. [2024-06-21 16:15:43,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 293 transitions, 3975 flow [2024-06-21 16:15:44,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 293 transitions, 3895 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 16:15:44,628 INFO L231 Difference]: Finished difference. Result has 219 places, 275 transitions, 3120 flow [2024-06-21 16:15:44,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3120, PETRI_PLACES=219, PETRI_TRANSITIONS=275} [2024-06-21 16:15:44,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 16:15:44,628 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 275 transitions, 3120 flow [2024-06-21 16:15:44,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:44,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:44,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:44,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:15:44,628 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:44,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2118127149, now seen corresponding path program 1 times [2024-06-21 16:15:44,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:44,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216964714] [2024-06-21 16:15:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:44,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:45,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:45,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216964714] [2024-06-21 16:15:45,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216964714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:45,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:45,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:15:45,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132738195] [2024-06-21 16:15:45,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:45,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:15:45,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:15:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:15:45,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:45,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 275 transitions, 3120 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:45,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:45,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:45,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:47,255 INFO L124 PetriNetUnfolderBase]: 3763/5737 cut-off events. [2024-06-21 16:15:47,256 INFO L125 PetriNetUnfolderBase]: For 659100/659102 co-relation queries the response was YES. [2024-06-21 16:15:47,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48596 conditions, 5737 events. 3763/5737 cut-off events. For 659100/659102 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 31094 event pairs, 839 based on Foata normal form. 4/5731 useless extension candidates. Maximal degree in co-relation 48490. Up to 5099 conditions per place. [2024-06-21 16:15:47,320 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 251 selfloop transitions, 61 changer transitions 0/335 dead transitions. [2024-06-21 16:15:47,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 335 transitions, 4035 flow [2024-06-21 16:15:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:15:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:15:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 221 transitions. [2024-06-21 16:15:47,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384920634920635 [2024-06-21 16:15:47,321 INFO L175 Difference]: Start difference. First operand has 219 places, 275 transitions, 3120 flow. Second operand 12 states and 221 transitions. [2024-06-21 16:15:47,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 335 transitions, 4035 flow [2024-06-21 16:15:48,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 335 transitions, 3944 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:48,108 INFO L231 Difference]: Finished difference. Result has 230 places, 287 transitions, 3346 flow [2024-06-21 16:15:48,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3346, PETRI_PLACES=230, PETRI_TRANSITIONS=287} [2024-06-21 16:15:48,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-21 16:15:48,109 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 287 transitions, 3346 flow [2024-06-21 16:15:48,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:48,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:48,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:48,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:15:48,109 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:48,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:48,109 INFO L85 PathProgramCache]: Analyzing trace with hash -292083714, now seen corresponding path program 2 times [2024-06-21 16:15:48,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:48,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679630136] [2024-06-21 16:15:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:48,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:48,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:48,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679630136] [2024-06-21 16:15:48,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679630136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:48,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:48,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:48,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749496362] [2024-06-21 16:15:48,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:48,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:48,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:48,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:48,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:48,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:48,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 287 transitions, 3346 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:48,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:48,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:48,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:49,901 INFO L124 PetriNetUnfolderBase]: 3983/6007 cut-off events. [2024-06-21 16:15:49,901 INFO L125 PetriNetUnfolderBase]: For 707030/707032 co-relation queries the response was YES. [2024-06-21 16:15:49,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52179 conditions, 6007 events. 3983/6007 cut-off events. For 707030/707032 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 32205 event pairs, 1002 based on Foata normal form. 8/6015 useless extension candidates. Maximal degree in co-relation 52069. Up to 5551 conditions per place. [2024-06-21 16:15:49,966 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 250 selfloop transitions, 72 changer transitions 0/325 dead transitions. [2024-06-21 16:15:49,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 325 transitions, 4656 flow [2024-06-21 16:15:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:15:49,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:15:49,967 INFO L175 Difference]: Start difference. First operand has 230 places, 287 transitions, 3346 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:15:49,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 325 transitions, 4656 flow [2024-06-21 16:15:50,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 325 transitions, 4502 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:50,936 INFO L231 Difference]: Finished difference. Result has 233 places, 298 transitions, 3536 flow [2024-06-21 16:15:50,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3192, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3536, PETRI_PLACES=233, PETRI_TRANSITIONS=298} [2024-06-21 16:15:50,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 16:15:50,937 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 298 transitions, 3536 flow [2024-06-21 16:15:50,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:50,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:50,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:50,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:15:50,937 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:50,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:50,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1686763296, now seen corresponding path program 3 times [2024-06-21 16:15:50,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:50,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321438786] [2024-06-21 16:15:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:50,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:51,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321438786] [2024-06-21 16:15:51,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321438786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:51,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:51,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:51,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673299295] [2024-06-21 16:15:51,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:51,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:51,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:51,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:51,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:51,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:51,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 298 transitions, 3536 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:51,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:51,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:51,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:52,779 INFO L124 PetriNetUnfolderBase]: 3971/5992 cut-off events. [2024-06-21 16:15:52,779 INFO L125 PetriNetUnfolderBase]: For 712694/712696 co-relation queries the response was YES. [2024-06-21 16:15:52,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52117 conditions, 5992 events. 3971/5992 cut-off events. For 712694/712696 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32148 event pairs, 1005 based on Foata normal form. 8/6000 useless extension candidates. Maximal degree in co-relation 52004. Up to 5547 conditions per place. [2024-06-21 16:15:52,848 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 250 selfloop transitions, 73 changer transitions 0/326 dead transitions. [2024-06-21 16:15:52,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 326 transitions, 4557 flow [2024-06-21 16:15:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:15:52,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 16:15:52,849 INFO L175 Difference]: Start difference. First operand has 233 places, 298 transitions, 3536 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:15:52,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 326 transitions, 4557 flow [2024-06-21 16:15:53,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 326 transitions, 4397 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:53,683 INFO L231 Difference]: Finished difference. Result has 237 places, 299 transitions, 3556 flow [2024-06-21 16:15:53,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3556, PETRI_PLACES=237, PETRI_TRANSITIONS=299} [2024-06-21 16:15:53,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 16:15:53,684 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 299 transitions, 3556 flow [2024-06-21 16:15:53,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:53,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:53,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:53,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:15:53,684 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:53,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1453666084, now seen corresponding path program 3 times [2024-06-21 16:15:53,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:53,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826539459] [2024-06-21 16:15:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:54,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:54,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826539459] [2024-06-21 16:15:54,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826539459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:54,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:54,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:54,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869355753] [2024-06-21 16:15:54,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:54,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:54,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:54,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:54,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:54,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:54,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 299 transitions, 3556 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:54,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:54,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:54,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:55,757 INFO L124 PetriNetUnfolderBase]: 3983/6009 cut-off events. [2024-06-21 16:15:55,757 INFO L125 PetriNetUnfolderBase]: For 726378/726380 co-relation queries the response was YES. [2024-06-21 16:15:55,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52236 conditions, 6009 events. 3983/6009 cut-off events. For 726378/726380 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 32273 event pairs, 989 based on Foata normal form. 4/6013 useless extension candidates. Maximal degree in co-relation 52122. Up to 5835 conditions per place. [2024-06-21 16:15:55,834 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 264 selfloop transitions, 55 changer transitions 0/322 dead transitions. [2024-06-21 16:15:55,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 322 transitions, 4570 flow [2024-06-21 16:15:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:15:55,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:15:55,835 INFO L175 Difference]: Start difference. First operand has 237 places, 299 transitions, 3556 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:15:55,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 322 transitions, 4570 flow [2024-06-21 16:15:56,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 322 transitions, 4422 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:15:56,739 INFO L231 Difference]: Finished difference. Result has 240 places, 303 transitions, 3587 flow [2024-06-21 16:15:56,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3587, PETRI_PLACES=240, PETRI_TRANSITIONS=303} [2024-06-21 16:15:56,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-21 16:15:56,739 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 303 transitions, 3587 flow [2024-06-21 16:15:56,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:15:56,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:56,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:56,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:15:56,740 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:56,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 321353734, now seen corresponding path program 3 times [2024-06-21 16:15:56,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:56,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960749580] [2024-06-21 16:15:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:56,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:57,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:57,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960749580] [2024-06-21 16:15:57,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960749580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:57,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:57,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:57,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490988784] [2024-06-21 16:15:57,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:57,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:57,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:57,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:57,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:57,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:57,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 303 transitions, 3587 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:57,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:57,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:57,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:58,417 INFO L124 PetriNetUnfolderBase]: 3970/5989 cut-off events. [2024-06-21 16:15:58,417 INFO L125 PetriNetUnfolderBase]: For 739509/739509 co-relation queries the response was YES. [2024-06-21 16:15:58,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52077 conditions, 5989 events. 3970/5989 cut-off events. For 739509/739509 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32162 event pairs, 986 based on Foata normal form. 1/5990 useless extension candidates. Maximal degree in co-relation 51962. Up to 5941 conditions per place. [2024-06-21 16:15:58,491 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 24 changer transitions 0/320 dead transitions. [2024-06-21 16:15:58,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 320 transitions, 4403 flow [2024-06-21 16:15:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:15:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:15:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 16:15:58,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 16:15:58,492 INFO L175 Difference]: Start difference. First operand has 240 places, 303 transitions, 3587 flow. Second operand 7 states and 118 transitions. [2024-06-21 16:15:58,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 320 transitions, 4403 flow [2024-06-21 16:15:59,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 320 transitions, 4257 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:15:59,312 INFO L231 Difference]: Finished difference. Result has 242 places, 303 transitions, 3495 flow [2024-06-21 16:15:59,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3495, PETRI_PLACES=242, PETRI_TRANSITIONS=303} [2024-06-21 16:15:59,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-21 16:15:59,313 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 303 transitions, 3495 flow [2024-06-21 16:15:59,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:59,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:59,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:59,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:15:59,314 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:59,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash 929301068, now seen corresponding path program 4 times [2024-06-21 16:15:59,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:59,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977768833] [2024-06-21 16:15:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:59,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:59,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:59,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977768833] [2024-06-21 16:15:59,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977768833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:59,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:59,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:15:59,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074569378] [2024-06-21 16:15:59,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:59,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:15:59,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:59,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:15:59,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:15:59,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:59,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 303 transitions, 3495 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:59,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:59,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:59,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:00,925 INFO L124 PetriNetUnfolderBase]: 3975/5996 cut-off events. [2024-06-21 16:16:00,926 INFO L125 PetriNetUnfolderBase]: For 755895/755895 co-relation queries the response was YES. [2024-06-21 16:16:00,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52213 conditions, 5996 events. 3975/5996 cut-off events. For 755895/755895 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32139 event pairs, 997 based on Foata normal form. 1/5997 useless extension candidates. Maximal degree in co-relation 52097. Up to 5963 conditions per place. [2024-06-21 16:16:00,996 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 297 selfloop transitions, 19 changer transitions 0/319 dead transitions. [2024-06-21 16:16:00,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 319 transitions, 4219 flow [2024-06-21 16:16:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 16:16:00,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 16:16:00,997 INFO L175 Difference]: Start difference. First operand has 242 places, 303 transitions, 3495 flow. Second operand 7 states and 113 transitions. [2024-06-21 16:16:00,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 319 transitions, 4219 flow [2024-06-21 16:16:01,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 319 transitions, 4006 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 16:16:01,916 INFO L231 Difference]: Finished difference. Result has 239 places, 306 transitions, 3392 flow [2024-06-21 16:16:01,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3296, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3392, PETRI_PLACES=239, PETRI_TRANSITIONS=306} [2024-06-21 16:16:01,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 16:16:01,916 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 306 transitions, 3392 flow [2024-06-21 16:16:01,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:01,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:01,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:01,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:16:01,917 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)] === [2024-06-21 16:16:01,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:01,917 INFO L85 PathProgramCache]: Analyzing trace with hash 275696881, now seen corresponding path program 2 times [2024-06-21 16:16:01,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:01,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735991991] [2024-06-21 16:16:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:02,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735991991] [2024-06-21 16:16:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735991991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:02,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:02,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:02,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969144302] [2024-06-21 16:16:02,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:02,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:02,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:03,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:16:03,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 306 transitions, 3392 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:03,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:03,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:16:03,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:04,337 INFO L124 PetriNetUnfolderBase]: 3910/5951 cut-off events. [2024-06-21 16:16:04,337 INFO L125 PetriNetUnfolderBase]: For 783835/783835 co-relation queries the response was YES. [2024-06-21 16:16:04,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52244 conditions, 5951 events. 3910/5951 cut-off events. For 783835/783835 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32420 event pairs, 949 based on Foata normal form. 4/5955 useless extension candidates. Maximal degree in co-relation 52128. Up to 5578 conditions per place. [2024-06-21 16:16:04,404 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 289 selfloop transitions, 34 changer transitions 0/348 dead transitions. [2024-06-21 16:16:04,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 348 transitions, 4252 flow [2024-06-21 16:16:04,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:16:04,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:16:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 16:16:04,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 16:16:04,406 INFO L175 Difference]: Start difference. First operand has 239 places, 306 transitions, 3392 flow. Second operand 10 states and 179 transitions. [2024-06-21 16:16:04,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 348 transitions, 4252 flow [2024-06-21 16:16:05,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 348 transitions, 4200 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:16:05,364 INFO L231 Difference]: Finished difference. Result has 246 places, 313 transitions, 3565 flow [2024-06-21 16:16:05,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3565, PETRI_PLACES=246, PETRI_TRANSITIONS=313} [2024-06-21 16:16:05,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-21 16:16:05,365 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 313 transitions, 3565 flow [2024-06-21 16:16:05,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:05,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:05,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:05,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:16:05,365 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:05,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:05,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1848412047, now seen corresponding path program 3 times [2024-06-21 16:16:05,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:05,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191744529] [2024-06-21 16:16:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:05,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:06,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:06,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191744529] [2024-06-21 16:16:06,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191744529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:06,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:06,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:06,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178436571] [2024-06-21 16:16:06,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:06,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:06,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:06,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:06,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:06,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:16:06,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 313 transitions, 3565 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:06,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:06,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:16:06,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:07,952 INFO L124 PetriNetUnfolderBase]: 3970/6045 cut-off events. [2024-06-21 16:16:07,952 INFO L125 PetriNetUnfolderBase]: For 823148/823148 co-relation queries the response was YES. [2024-06-21 16:16:07,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54077 conditions, 6045 events. 3970/6045 cut-off events. For 823148/823148 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 33060 event pairs, 950 based on Foata normal form. 8/6053 useless extension candidates. Maximal degree in co-relation 53958. Up to 5644 conditions per place. [2024-06-21 16:16:08,022 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 36 changer transitions 0/355 dead transitions. [2024-06-21 16:16:08,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 355 transitions, 4706 flow [2024-06-21 16:16:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:16:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:16:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 16:16:08,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 16:16:08,023 INFO L175 Difference]: Start difference. First operand has 246 places, 313 transitions, 3565 flow. Second operand 10 states and 178 transitions. [2024-06-21 16:16:08,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 355 transitions, 4706 flow [2024-06-21 16:16:09,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 355 transitions, 4602 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:09,294 INFO L231 Difference]: Finished difference. Result has 253 places, 319 transitions, 3716 flow [2024-06-21 16:16:09,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3716, PETRI_PLACES=253, PETRI_TRANSITIONS=319} [2024-06-21 16:16:09,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 16:16:09,295 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 319 transitions, 3716 flow [2024-06-21 16:16:09,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:09,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:09,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:09,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:16:09,295 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:09,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1848403429, now seen corresponding path program 1 times [2024-06-21 16:16:09,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:09,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328315881] [2024-06-21 16:16:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:09,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:10,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:10,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328315881] [2024-06-21 16:16:10,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328315881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:10,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:10,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:10,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257573467] [2024-06-21 16:16:10,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:10,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:10,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:10,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:16:10,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 319 transitions, 3716 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:10,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:10,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:16:10,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:12,024 INFO L124 PetriNetUnfolderBase]: 3987/6070 cut-off events. [2024-06-21 16:16:12,024 INFO L125 PetriNetUnfolderBase]: For 829996/829996 co-relation queries the response was YES. [2024-06-21 16:16:12,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54409 conditions, 6070 events. 3987/6070 cut-off events. For 829996/829996 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33225 event pairs, 943 based on Foata normal form. 2/6072 useless extension candidates. Maximal degree in co-relation 54287. Up to 5761 conditions per place. [2024-06-21 16:16:12,099 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 297 selfloop transitions, 34 changer transitions 0/356 dead transitions. [2024-06-21 16:16:12,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 356 transitions, 4497 flow [2024-06-21 16:16:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:16:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:16:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 16:16:12,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 16:16:12,100 INFO L175 Difference]: Start difference. First operand has 253 places, 319 transitions, 3716 flow. Second operand 10 states and 176 transitions. [2024-06-21 16:16:12,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 356 transitions, 4497 flow [2024-06-21 16:16:13,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 356 transitions, 4345 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 16:16:13,063 INFO L231 Difference]: Finished difference. Result has 257 places, 322 transitions, 3679 flow [2024-06-21 16:16:13,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3679, PETRI_PLACES=257, PETRI_TRANSITIONS=322} [2024-06-21 16:16:13,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 16:16:13,064 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 322 transitions, 3679 flow [2024-06-21 16:16:13,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:13,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:13,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:13,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:16:13,064 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:13,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:13,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1848403677, now seen corresponding path program 4 times [2024-06-21 16:16:13,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:13,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170766181] [2024-06-21 16:16:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:13,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:14,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:14,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170766181] [2024-06-21 16:16:14,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170766181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:14,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:14,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:14,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610561712] [2024-06-21 16:16:14,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:14,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:14,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:14,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:14,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:14,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:16:14,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 322 transitions, 3679 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:14,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:14,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:16:14,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:15,613 INFO L124 PetriNetUnfolderBase]: 3979/6058 cut-off events. [2024-06-21 16:16:15,613 INFO L125 PetriNetUnfolderBase]: For 845306/845306 co-relation queries the response was YES. [2024-06-21 16:16:15,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54100 conditions, 6058 events. 3979/6058 cut-off events. For 845306/845306 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 33160 event pairs, 946 based on Foata normal form. 4/6062 useless extension candidates. Maximal degree in co-relation 53976. Up to 5745 conditions per place. [2024-06-21 16:16:15,687 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 300 selfloop transitions, 31 changer transitions 0/356 dead transitions. [2024-06-21 16:16:15,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 356 transitions, 4429 flow [2024-06-21 16:16:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:16:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:16:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 16:16:15,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:16:15,693 INFO L175 Difference]: Start difference. First operand has 257 places, 322 transitions, 3679 flow. Second operand 10 states and 175 transitions. [2024-06-21 16:16:15,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 356 transitions, 4429 flow [2024-06-21 16:16:16,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 356 transitions, 4282 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 16:16:16,586 INFO L231 Difference]: Finished difference. Result has 258 places, 322 transitions, 3603 flow [2024-06-21 16:16:16,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3603, PETRI_PLACES=258, PETRI_TRANSITIONS=322} [2024-06-21 16:16:16,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 16:16:16,587 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 322 transitions, 3603 flow [2024-06-21 16:16:16,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:16,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:16,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:16,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:16:16,587 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:16,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:16,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1858531377, now seen corresponding path program 5 times [2024-06-21 16:16:16,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:16,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615416359] [2024-06-21 16:16:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:16,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:17,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:17,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615416359] [2024-06-21 16:16:17,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615416359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:17,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:17,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382581086] [2024-06-21 16:16:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:17,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:17,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:17,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:16:17,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 322 transitions, 3603 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:17,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:17,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:16:17,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:18,961 INFO L124 PetriNetUnfolderBase]: 3971/6046 cut-off events. [2024-06-21 16:16:18,962 INFO L125 PetriNetUnfolderBase]: For 858962/858962 co-relation queries the response was YES. [2024-06-21 16:16:19,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53884 conditions, 6046 events. 3971/6046 cut-off events. For 858962/858962 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32971 event pairs, 933 based on Foata normal form. 4/6050 useless extension candidates. Maximal degree in co-relation 53759. Up to 5764 conditions per place. [2024-06-21 16:16:19,033 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 311 selfloop transitions, 22 changer transitions 0/358 dead transitions. [2024-06-21 16:16:19,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 358 transitions, 4403 flow [2024-06-21 16:16:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:16:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:16:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 16:16:19,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-21 16:16:19,034 INFO L175 Difference]: Start difference. First operand has 258 places, 322 transitions, 3603 flow. Second operand 10 states and 173 transitions. [2024-06-21 16:16:19,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 358 transitions, 4403 flow [2024-06-21 16:16:19,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 358 transitions, 4333 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 16:16:19,930 INFO L231 Difference]: Finished difference. Result has 259 places, 324 transitions, 3638 flow [2024-06-21 16:16:19,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3638, PETRI_PLACES=259, PETRI_TRANSITIONS=324} [2024-06-21 16:16:19,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-21 16:16:19,931 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 324 transitions, 3638 flow [2024-06-21 16:16:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:19,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:19,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:19,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:16:19,931 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:19,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:19,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2062909391, now seen corresponding path program 6 times [2024-06-21 16:16:19,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:19,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603003623] [2024-06-21 16:16:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:19,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:21,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:21,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603003623] [2024-06-21 16:16:21,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603003623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:21,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:21,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:21,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346352283] [2024-06-21 16:16:21,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:21,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:21,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:21,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:21,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:16:21,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 324 transitions, 3638 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:21,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:21,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:16:21,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:22,662 INFO L124 PetriNetUnfolderBase]: 3963/6034 cut-off events. [2024-06-21 16:16:22,662 INFO L125 PetriNetUnfolderBase]: For 873024/873024 co-relation queries the response was YES. [2024-06-21 16:16:22,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53944 conditions, 6034 events. 3963/6034 cut-off events. For 873024/873024 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32992 event pairs, 932 based on Foata normal form. 4/6038 useless extension candidates. Maximal degree in co-relation 53818. Up to 5648 conditions per place. [2024-06-21 16:16:22,731 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 309 selfloop transitions, 41 changer transitions 0/375 dead transitions. [2024-06-21 16:16:22,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 375 transitions, 4587 flow [2024-06-21 16:16:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:16:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:16:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-21 16:16:22,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 16:16:22,732 INFO L175 Difference]: Start difference. First operand has 259 places, 324 transitions, 3638 flow. Second operand 12 states and 212 transitions. [2024-06-21 16:16:22,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 375 transitions, 4587 flow [2024-06-21 16:16:23,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 375 transitions, 4500 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 16:16:23,836 INFO L231 Difference]: Finished difference. Result has 265 places, 331 transitions, 3793 flow [2024-06-21 16:16:23,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3793, PETRI_PLACES=265, PETRI_TRANSITIONS=331} [2024-06-21 16:16:23,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-21 16:16:23,836 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 331 transitions, 3793 flow [2024-06-21 16:16:23,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:23,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:23,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:23,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:16:23,837 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)] === [2024-06-21 16:16:23,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1907413636, now seen corresponding path program 5 times [2024-06-21 16:16:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:23,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690867348] [2024-06-21 16:16:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:23,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:24,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:24,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690867348] [2024-06-21 16:16:24,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690867348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:24,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:24,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:24,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698194481] [2024-06-21 16:16:24,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:24,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:24,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:24,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:24,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 331 transitions, 3793 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:24,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:24,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:24,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:25,561 INFO L124 PetriNetUnfolderBase]: 4058/6129 cut-off events. [2024-06-21 16:16:25,561 INFO L125 PetriNetUnfolderBase]: For 885178/885180 co-relation queries the response was YES. [2024-06-21 16:16:25,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54954 conditions, 6129 events. 4058/6129 cut-off events. For 885178/885180 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33109 event pairs, 996 based on Foata normal form. 3/6132 useless extension candidates. Maximal degree in co-relation 54825. Up to 6095 conditions per place. [2024-06-21 16:16:25,642 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 319 selfloop transitions, 19 changer transitions 0/341 dead transitions. [2024-06-21 16:16:25,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 341 transitions, 4493 flow [2024-06-21 16:16:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 16:16:25,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-21 16:16:25,643 INFO L175 Difference]: Start difference. First operand has 265 places, 331 transitions, 3793 flow. Second operand 7 states and 110 transitions. [2024-06-21 16:16:25,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 341 transitions, 4493 flow [2024-06-21 16:16:26,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 341 transitions, 4334 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-21 16:16:26,653 INFO L231 Difference]: Finished difference. Result has 265 places, 331 transitions, 3678 flow [2024-06-21 16:16:26,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3678, PETRI_PLACES=265, PETRI_TRANSITIONS=331} [2024-06-21 16:16:26,653 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-21 16:16:26,654 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 331 transitions, 3678 flow [2024-06-21 16:16:26,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:26,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:26,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:26,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:16:26,654 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)] === [2024-06-21 16:16:26,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash 51993842, now seen corresponding path program 6 times [2024-06-21 16:16:26,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:26,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983760317] [2024-06-21 16:16:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:26,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:27,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:27,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983760317] [2024-06-21 16:16:27,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983760317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:27,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:27,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:27,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239028073] [2024-06-21 16:16:27,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:27,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:27,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:27,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:27,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 331 transitions, 3678 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:27,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:27,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:27,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:28,380 INFO L124 PetriNetUnfolderBase]: 4050/6118 cut-off events. [2024-06-21 16:16:28,381 INFO L125 PetriNetUnfolderBase]: For 903071/903073 co-relation queries the response was YES. [2024-06-21 16:16:28,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54677 conditions, 6118 events. 4050/6118 cut-off events. For 903071/903073 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 33027 event pairs, 993 based on Foata normal form. 4/6122 useless extension candidates. Maximal degree in co-relation 54546. Up to 6062 conditions per place. [2024-06-21 16:16:28,456 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 29 changer transitions 0/341 dead transitions. [2024-06-21 16:16:28,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 341 transitions, 4378 flow [2024-06-21 16:16:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 16:16:28,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 16:16:28,457 INFO L175 Difference]: Start difference. First operand has 265 places, 331 transitions, 3678 flow. Second operand 7 states and 113 transitions. [2024-06-21 16:16:28,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 341 transitions, 4378 flow [2024-06-21 16:16:29,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 341 transitions, 4306 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:16:29,443 INFO L231 Difference]: Finished difference. Result has 266 places, 331 transitions, 3672 flow [2024-06-21 16:16:29,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3672, PETRI_PLACES=266, PETRI_TRANSITIONS=331} [2024-06-21 16:16:29,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 16:16:29,444 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 331 transitions, 3672 flow [2024-06-21 16:16:29,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:29,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:29,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:29,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:16:29,444 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:29,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:29,445 INFO L85 PathProgramCache]: Analyzing trace with hash 52405956, now seen corresponding path program 4 times [2024-06-21 16:16:29,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:29,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045987206] [2024-06-21 16:16:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:29,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:30,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:30,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045987206] [2024-06-21 16:16:30,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045987206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:30,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:30,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:30,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824042574] [2024-06-21 16:16:30,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:30,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:30,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:30,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:30,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:30,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:30,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 331 transitions, 3672 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:30,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:30,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:30,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:31,295 INFO L124 PetriNetUnfolderBase]: 4134/6235 cut-off events. [2024-06-21 16:16:31,295 INFO L125 PetriNetUnfolderBase]: For 955193/955195 co-relation queries the response was YES. [2024-06-21 16:16:31,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56281 conditions, 6235 events. 4134/6235 cut-off events. For 955193/955195 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33733 event pairs, 1001 based on Foata normal form. 8/6243 useless extension candidates. Maximal degree in co-relation 56149. Up to 6110 conditions per place. [2024-06-21 16:16:31,375 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 318 selfloop transitions, 34 changer transitions 0/355 dead transitions. [2024-06-21 16:16:31,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 355 transitions, 4725 flow [2024-06-21 16:16:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 16:16:31,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 16:16:31,376 INFO L175 Difference]: Start difference. First operand has 266 places, 331 transitions, 3672 flow. Second operand 8 states and 131 transitions. [2024-06-21 16:16:31,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 355 transitions, 4725 flow [2024-06-21 16:16:32,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 355 transitions, 4638 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:16:32,368 INFO L231 Difference]: Finished difference. Result has 268 places, 339 transitions, 3833 flow [2024-06-21 16:16:32,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3585, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3833, PETRI_PLACES=268, PETRI_TRANSITIONS=339} [2024-06-21 16:16:32,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 16:16:32,369 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 339 transitions, 3833 flow [2024-06-21 16:16:32,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:32,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:32,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:32,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:16:32,369 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)] === [2024-06-21 16:16:32,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash 52420340, now seen corresponding path program 1 times [2024-06-21 16:16:32,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:32,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007515113] [2024-06-21 16:16:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:33,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:33,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007515113] [2024-06-21 16:16:33,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007515113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:33,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:33,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:33,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456671401] [2024-06-21 16:16:33,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:33,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:33,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:33,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:33,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:33,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:16:33,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 339 transitions, 3833 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:33,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:33,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:16:33,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:34,329 INFO L124 PetriNetUnfolderBase]: 3979/6067 cut-off events. [2024-06-21 16:16:34,329 INFO L125 PetriNetUnfolderBase]: For 960261/960261 co-relation queries the response was YES. [2024-06-21 16:16:34,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55341 conditions, 6067 events. 3979/6067 cut-off events. For 960261/960261 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 33347 event pairs, 973 based on Foata normal form. 2/6055 useless extension candidates. Maximal degree in co-relation 55207. Up to 5809 conditions per place. [2024-06-21 16:16:34,405 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 17 changer transitions 0/355 dead transitions. [2024-06-21 16:16:34,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 355 transitions, 4551 flow [2024-06-21 16:16:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:16:34,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 16:16:34,406 INFO L175 Difference]: Start difference. First operand has 268 places, 339 transitions, 3833 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:16:34,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 355 transitions, 4551 flow [2024-06-21 16:16:35,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 355 transitions, 4424 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 16:16:35,582 INFO L231 Difference]: Finished difference. Result has 271 places, 342 transitions, 3818 flow [2024-06-21 16:16:35,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3818, PETRI_PLACES=271, PETRI_TRANSITIONS=342} [2024-06-21 16:16:35,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 16:16:35,583 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 342 transitions, 3818 flow [2024-06-21 16:16:35,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:35,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:35,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:35,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:16:35,583 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)] === [2024-06-21 16:16:35,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2086260606, now seen corresponding path program 5 times [2024-06-21 16:16:35,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:35,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642889924] [2024-06-21 16:16:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:35,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:36,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:36,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642889924] [2024-06-21 16:16:36,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642889924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:36,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:36,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:36,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040951704] [2024-06-21 16:16:36,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:36,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:36,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:36,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:36,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:36,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 342 transitions, 3818 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:36,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:36,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:36,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:37,456 INFO L124 PetriNetUnfolderBase]: 4158/6269 cut-off events. [2024-06-21 16:16:37,456 INFO L125 PetriNetUnfolderBase]: For 996047/996049 co-relation queries the response was YES. [2024-06-21 16:16:37,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57028 conditions, 6269 events. 4158/6269 cut-off events. For 996047/996049 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33913 event pairs, 985 based on Foata normal form. 8/6277 useless extension candidates. Maximal degree in co-relation 56894. Up to 6000 conditions per place. [2024-06-21 16:16:37,527 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 305 selfloop transitions, 57 changer transitions 0/365 dead transitions. [2024-06-21 16:16:37,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 365 transitions, 4998 flow [2024-06-21 16:16:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:16:37,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:16:37,528 INFO L175 Difference]: Start difference. First operand has 271 places, 342 transitions, 3818 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:16:37,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 365 transitions, 4998 flow [2024-06-21 16:16:38,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 365 transitions, 4902 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:16:38,858 INFO L231 Difference]: Finished difference. Result has 273 places, 346 transitions, 3917 flow [2024-06-21 16:16:38,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3917, PETRI_PLACES=273, PETRI_TRANSITIONS=346} [2024-06-21 16:16:38,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 16:16:38,858 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 346 transitions, 3917 flow [2024-06-21 16:16:38,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:38,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:38,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:38,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:16:38,859 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)] === [2024-06-21 16:16:38,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:38,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1279664304, now seen corresponding path program 4 times [2024-06-21 16:16:38,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:38,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775256008] [2024-06-21 16:16:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:38,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:39,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:39,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775256008] [2024-06-21 16:16:39,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775256008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:39,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:39,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:39,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563351716] [2024-06-21 16:16:39,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:39,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:39,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:39,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:39,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:39,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 346 transitions, 3917 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:39,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:39,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:39,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:40,812 INFO L124 PetriNetUnfolderBase]: 4152/6261 cut-off events. [2024-06-21 16:16:40,812 INFO L125 PetriNetUnfolderBase]: For 999837/999839 co-relation queries the response was YES. [2024-06-21 16:16:40,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57236 conditions, 6261 events. 4152/6261 cut-off events. For 999837/999839 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33848 event pairs, 1010 based on Foata normal form. 4/6265 useless extension candidates. Maximal degree in co-relation 57101. Up to 6199 conditions per place. [2024-06-21 16:16:40,882 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 35 changer transitions 0/357 dead transitions. [2024-06-21 16:16:40,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 357 transitions, 4651 flow [2024-06-21 16:16:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:40,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 16:16:40,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:16:40,883 INFO L175 Difference]: Start difference. First operand has 273 places, 346 transitions, 3917 flow. Second operand 8 states and 126 transitions. [2024-06-21 16:16:40,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 357 transitions, 4651 flow [2024-06-21 16:16:42,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 357 transitions, 4386 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 16:16:42,123 INFO L231 Difference]: Finished difference. Result has 274 places, 346 transitions, 3729 flow [2024-06-21 16:16:42,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3729, PETRI_PLACES=274, PETRI_TRANSITIONS=346} [2024-06-21 16:16:42,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 16:16:42,124 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 346 transitions, 3729 flow [2024-06-21 16:16:42,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:42,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:42,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:42,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:16:42,124 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)] === [2024-06-21 16:16:42,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:42,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2086272696, now seen corresponding path program 6 times [2024-06-21 16:16:42,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:42,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85188261] [2024-06-21 16:16:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:42,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:42,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:42,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85188261] [2024-06-21 16:16:42,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85188261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:42,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:42,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:42,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629988448] [2024-06-21 16:16:42,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:42,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:42,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:42,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:42,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:42,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:42,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 346 transitions, 3729 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:42,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:42,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:42,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:44,035 INFO L124 PetriNetUnfolderBase]: 4140/6246 cut-off events. [2024-06-21 16:16:44,035 INFO L125 PetriNetUnfolderBase]: For 1012071/1012073 co-relation queries the response was YES. [2024-06-21 16:16:44,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56084 conditions, 6246 events. 4140/6246 cut-off events. For 1012071/1012073 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 33813 event pairs, 993 based on Foata normal form. 8/6254 useless extension candidates. Maximal degree in co-relation 55949. Up to 5988 conditions per place. [2024-06-21 16:16:44,228 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 310 selfloop transitions, 52 changer transitions 0/365 dead transitions. [2024-06-21 16:16:44,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 365 transitions, 4837 flow [2024-06-21 16:16:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:16:44,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:16:44,229 INFO L175 Difference]: Start difference. First operand has 274 places, 346 transitions, 3729 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:16:44,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 365 transitions, 4837 flow [2024-06-21 16:16:45,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 365 transitions, 4700 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 16:16:45,411 INFO L231 Difference]: Finished difference. Result has 275 places, 346 transitions, 3704 flow [2024-06-21 16:16:45,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3704, PETRI_PLACES=275, PETRI_TRANSITIONS=346} [2024-06-21 16:16:45,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 16:16:45,412 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 346 transitions, 3704 flow [2024-06-21 16:16:45,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:45,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:45,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:45,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:16:45,412 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)] === [2024-06-21 16:16:45,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:45,413 INFO L85 PathProgramCache]: Analyzing trace with hash 203924688, now seen corresponding path program 1 times [2024-06-21 16:16:45,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:45,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292035311] [2024-06-21 16:16:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:45,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:46,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:46,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292035311] [2024-06-21 16:16:46,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292035311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:46,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:46,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:46,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268110452] [2024-06-21 16:16:46,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:46,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:46,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:46,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:46,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:46,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:46,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 346 transitions, 3704 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:46,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:46,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:46,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:47,467 INFO L124 PetriNetUnfolderBase]: 4150/6259 cut-off events. [2024-06-21 16:16:47,467 INFO L125 PetriNetUnfolderBase]: For 1022673/1022673 co-relation queries the response was YES. [2024-06-21 16:16:47,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56495 conditions, 6259 events. 4150/6259 cut-off events. For 1022673/1022673 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 33850 event pairs, 998 based on Foata normal form. 2/6261 useless extension candidates. Maximal degree in co-relation 56359. Up to 6203 conditions per place. [2024-06-21 16:16:47,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 348 selfloop transitions, 19 changer transitions 0/370 dead transitions. [2024-06-21 16:16:47,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 370 transitions, 4532 flow [2024-06-21 16:16:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 16:16:47,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 16:16:47,553 INFO L175 Difference]: Start difference. First operand has 275 places, 346 transitions, 3704 flow. Second operand 8 states and 131 transitions. [2024-06-21 16:16:47,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 370 transitions, 4532 flow [2024-06-21 16:16:49,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 370 transitions, 4342 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 16:16:49,176 INFO L231 Difference]: Finished difference. Result has 275 places, 349 transitions, 3605 flow [2024-06-21 16:16:49,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3605, PETRI_PLACES=275, PETRI_TRANSITIONS=349} [2024-06-21 16:16:49,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 16:16:49,176 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 349 transitions, 3605 flow [2024-06-21 16:16:49,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:49,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:49,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:49,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:16:49,177 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)] === [2024-06-21 16:16:49,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:49,177 INFO L85 PathProgramCache]: Analyzing trace with hash 905098028, now seen corresponding path program 1 times [2024-06-21 16:16:49,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:49,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64426851] [2024-06-21 16:16:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:49,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:49,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:49,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64426851] [2024-06-21 16:16:49,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64426851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:49,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:49,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:49,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456042634] [2024-06-21 16:16:49,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:49,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:49,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:49,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:49,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:49,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 349 transitions, 3605 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:49,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:49,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:49,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:51,275 INFO L124 PetriNetUnfolderBase]: 4165/6280 cut-off events. [2024-06-21 16:16:51,275 INFO L125 PetriNetUnfolderBase]: For 1046640/1046640 co-relation queries the response was YES. [2024-06-21 16:16:51,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56790 conditions, 6280 events. 4165/6280 cut-off events. For 1046640/1046640 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33947 event pairs, 996 based on Foata normal form. 3/6283 useless extension candidates. Maximal degree in co-relation 56655. Up to 6149 conditions per place. [2024-06-21 16:16:51,356 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 328 selfloop transitions, 48 changer transitions 0/379 dead transitions. [2024-06-21 16:16:51,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 379 transitions, 4681 flow [2024-06-21 16:16:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:16:51,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 16:16:51,357 INFO L175 Difference]: Start difference. First operand has 275 places, 349 transitions, 3605 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:16:51,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 379 transitions, 4681 flow [2024-06-21 16:16:52,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 379 transitions, 4614 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 16:16:52,696 INFO L231 Difference]: Finished difference. Result has 277 places, 355 transitions, 3738 flow [2024-06-21 16:16:52,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3738, PETRI_PLACES=277, PETRI_TRANSITIONS=355} [2024-06-21 16:16:52,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 16:16:52,697 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 355 transitions, 3738 flow [2024-06-21 16:16:52,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:52,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:52,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:52,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:16:52,697 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)] === [2024-06-21 16:16:52,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:52,697 INFO L85 PathProgramCache]: Analyzing trace with hash 905097842, now seen corresponding path program 2 times [2024-06-21 16:16:52,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:52,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937272909] [2024-06-21 16:16:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:52,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:53,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:53,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937272909] [2024-06-21 16:16:53,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937272909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:53,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:53,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918673880] [2024-06-21 16:16:53,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:53,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:53,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:53,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:53,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 355 transitions, 3738 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:53,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:53,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:53,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:54,740 INFO L124 PetriNetUnfolderBase]: 4175/6294 cut-off events. [2024-06-21 16:16:54,740 INFO L125 PetriNetUnfolderBase]: For 1068816/1068816 co-relation queries the response was YES. [2024-06-21 16:16:54,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57621 conditions, 6294 events. 4175/6294 cut-off events. For 1068816/1068816 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 34054 event pairs, 994 based on Foata normal form. 2/6296 useless extension candidates. Maximal degree in co-relation 57485. Up to 6203 conditions per place. [2024-06-21 16:16:54,825 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 38 changer transitions 0/382 dead transitions. [2024-06-21 16:16:54,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 382 transitions, 4822 flow [2024-06-21 16:16:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:16:54,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 16:16:54,826 INFO L175 Difference]: Start difference. First operand has 277 places, 355 transitions, 3738 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:16:54,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 382 transitions, 4822 flow [2024-06-21 16:16:56,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 382 transitions, 4721 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:56,064 INFO L231 Difference]: Finished difference. Result has 281 places, 361 transitions, 3821 flow [2024-06-21 16:16:56,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3821, PETRI_PLACES=281, PETRI_TRANSITIONS=361} [2024-06-21 16:16:56,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 16:16:56,065 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 361 transitions, 3821 flow [2024-06-21 16:16:56,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:56,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:56,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:56,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:16:56,065 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)] === [2024-06-21 16:16:56,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:56,066 INFO L85 PathProgramCache]: Analyzing trace with hash 909746168, now seen corresponding path program 2 times [2024-06-21 16:16:56,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:56,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458322415] [2024-06-21 16:16:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:56,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:56,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:56,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458322415] [2024-06-21 16:16:56,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458322415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:56,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:56,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:56,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890607905] [2024-06-21 16:16:56,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:56,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:56,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:56,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:56,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:56,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:56,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 361 transitions, 3821 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:56,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:56,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:56,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:58,191 INFO L124 PetriNetUnfolderBase]: 4214/6348 cut-off events. [2024-06-21 16:16:58,191 INFO L125 PetriNetUnfolderBase]: For 1109806/1109806 co-relation queries the response was YES. [2024-06-21 16:16:58,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58747 conditions, 6348 events. 4214/6348 cut-off events. For 1109806/1109806 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 34369 event pairs, 990 based on Foata normal form. 3/6351 useless extension candidates. Maximal degree in co-relation 58609. Up to 6198 conditions per place. [2024-06-21 16:16:58,273 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 50 changer transitions 0/391 dead transitions. [2024-06-21 16:16:58,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 391 transitions, 5078 flow [2024-06-21 16:16:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:16:58,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:16:58,274 INFO L175 Difference]: Start difference. First operand has 281 places, 361 transitions, 3821 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:16:58,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 391 transitions, 5078 flow [2024-06-21 16:16:59,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 391 transitions, 4997 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:59,945 INFO L231 Difference]: Finished difference. Result has 285 places, 367 transitions, 3911 flow [2024-06-21 16:16:59,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3911, PETRI_PLACES=285, PETRI_TRANSITIONS=367} [2024-06-21 16:16:59,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 16:16:59,946 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 367 transitions, 3911 flow [2024-06-21 16:16:59,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:16:59,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:59,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:59,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:16:59,946 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)] === [2024-06-21 16:16:59,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:59,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1698782314, now seen corresponding path program 3 times [2024-06-21 16:16:59,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:59,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146724192] [2024-06-21 16:16:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:59,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:00,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146724192] [2024-06-21 16:17:00,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146724192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:00,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:00,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:00,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447755549] [2024-06-21 16:17:00,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:00,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:00,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:00,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:00,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:00,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 367 transitions, 3911 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:00,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:00,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:00,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:02,084 INFO L124 PetriNetUnfolderBase]: 4205/6336 cut-off events. [2024-06-21 16:17:02,084 INFO L125 PetriNetUnfolderBase]: For 1121426/1121426 co-relation queries the response was YES. [2024-06-21 16:17:02,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58745 conditions, 6336 events. 4205/6336 cut-off events. For 1121426/1121426 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 34283 event pairs, 998 based on Foata normal form. 3/6339 useless extension candidates. Maximal degree in co-relation 58605. Up to 6191 conditions per place. [2024-06-21 16:17:02,164 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 49 changer transitions 0/392 dead transitions. [2024-06-21 16:17:02,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 392 transitions, 4936 flow [2024-06-21 16:17:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:17:02,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 16:17:02,165 INFO L175 Difference]: Start difference. First operand has 285 places, 367 transitions, 3911 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:17:02,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 392 transitions, 4936 flow [2024-06-21 16:17:03,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 392 transitions, 4836 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 16:17:03,710 INFO L231 Difference]: Finished difference. Result has 289 places, 367 transitions, 3915 flow [2024-06-21 16:17:03,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3811, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3915, PETRI_PLACES=289, PETRI_TRANSITIONS=367} [2024-06-21 16:17:03,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 16:17:03,711 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 367 transitions, 3915 flow [2024-06-21 16:17:03,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:03,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:03,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:03,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:17:03,711 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)] === [2024-06-21 16:17:03,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 909739472, now seen corresponding path program 3 times [2024-06-21 16:17:03,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:03,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867718825] [2024-06-21 16:17:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:03,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:04,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:04,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867718825] [2024-06-21 16:17:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867718825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:04,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:04,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:04,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538629162] [2024-06-21 16:17:04,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:04,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:04,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:04,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:04,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:04,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:04,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 367 transitions, 3915 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:04,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:04,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:04,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:05,798 INFO L124 PetriNetUnfolderBase]: 4215/6350 cut-off events. [2024-06-21 16:17:05,798 INFO L125 PetriNetUnfolderBase]: For 1140997/1140997 co-relation queries the response was YES. [2024-06-21 16:17:05,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59035 conditions, 6350 events. 4215/6350 cut-off events. For 1140997/1140997 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 34359 event pairs, 992 based on Foata normal form. 2/6352 useless extension candidates. Maximal degree in co-relation 58894. Up to 6255 conditions per place. [2024-06-21 16:17:05,892 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 40 changer transitions 0/388 dead transitions. [2024-06-21 16:17:05,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 388 transitions, 4955 flow [2024-06-21 16:17:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:17:05,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:17:05,894 INFO L175 Difference]: Start difference. First operand has 289 places, 367 transitions, 3915 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:17:05,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 388 transitions, 4955 flow [2024-06-21 16:17:07,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 388 transitions, 4847 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:07,540 INFO L231 Difference]: Finished difference. Result has 290 places, 370 transitions, 3935 flow [2024-06-21 16:17:07,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3807, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3935, PETRI_PLACES=290, PETRI_TRANSITIONS=370} [2024-06-21 16:17:07,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 16:17:07,541 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 370 transitions, 3935 flow [2024-06-21 16:17:07,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:07,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:07,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:07,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:17:07,541 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)] === [2024-06-21 16:17:07,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:07,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2089614170, now seen corresponding path program 4 times [2024-06-21 16:17:07,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:07,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460231243] [2024-06-21 16:17:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:07,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:08,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:08,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460231243] [2024-06-21 16:17:08,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460231243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:08,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:08,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:08,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028654859] [2024-06-21 16:17:08,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:08,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:08,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:08,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:08,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:08,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 370 transitions, 3935 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:08,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:08,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:08,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:09,713 INFO L124 PetriNetUnfolderBase]: 4254/6406 cut-off events. [2024-06-21 16:17:09,713 INFO L125 PetriNetUnfolderBase]: For 1182301/1182303 co-relation queries the response was YES. [2024-06-21 16:17:09,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59817 conditions, 6406 events. 4254/6406 cut-off events. For 1182301/1182303 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34694 event pairs, 1000 based on Foata normal form. 5/6411 useless extension candidates. Maximal degree in co-relation 59675. Up to 6240 conditions per place. [2024-06-21 16:17:09,785 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 55 changer transitions 0/399 dead transitions. [2024-06-21 16:17:09,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 399 transitions, 5229 flow [2024-06-21 16:17:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 16:17:09,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 16:17:09,786 INFO L175 Difference]: Start difference. First operand has 290 places, 370 transitions, 3935 flow. Second operand 8 states and 138 transitions. [2024-06-21 16:17:09,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 399 transitions, 5229 flow [2024-06-21 16:17:11,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 399 transitions, 5141 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:11,471 INFO L231 Difference]: Finished difference. Result has 293 places, 376 transitions, 4034 flow [2024-06-21 16:17:11,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4034, PETRI_PLACES=293, PETRI_TRANSITIONS=376} [2024-06-21 16:17:11,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 16:17:11,471 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 376 transitions, 4034 flow [2024-06-21 16:17:11,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:11,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:11,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:11,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:17:11,472 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)] === [2024-06-21 16:17:11,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1265657574, now seen corresponding path program 5 times [2024-06-21 16:17:11,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:11,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089760078] [2024-06-21 16:17:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:11,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:12,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:12,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089760078] [2024-06-21 16:17:12,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089760078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:12,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:12,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:12,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383138195] [2024-06-21 16:17:12,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:12,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:12,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:12,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:12,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:12,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:12,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 376 transitions, 4034 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:12,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:12,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:12,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:13,694 INFO L124 PetriNetUnfolderBase]: 4245/6394 cut-off events. [2024-06-21 16:17:13,694 INFO L125 PetriNetUnfolderBase]: For 1194018/1194020 co-relation queries the response was YES. [2024-06-21 16:17:13,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59789 conditions, 6394 events. 4245/6394 cut-off events. For 1194018/1194020 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 34597 event pairs, 990 based on Foata normal form. 5/6399 useless extension candidates. Maximal degree in co-relation 59646. Up to 6233 conditions per place. [2024-06-21 16:17:13,767 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 58 changer transitions 0/394 dead transitions. [2024-06-21 16:17:13,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 394 transitions, 5049 flow [2024-06-21 16:17:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:17:13,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:17:13,768 INFO L175 Difference]: Start difference. First operand has 293 places, 376 transitions, 4034 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:17:13,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 394 transitions, 5049 flow [2024-06-21 16:17:15,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 394 transitions, 4901 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:15,380 INFO L231 Difference]: Finished difference. Result has 296 places, 376 transitions, 4009 flow [2024-06-21 16:17:15,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4009, PETRI_PLACES=296, PETRI_TRANSITIONS=376} [2024-06-21 16:17:15,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 16:17:15,381 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 376 transitions, 4009 flow [2024-06-21 16:17:15,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:15,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:15,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:15,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:17:15,381 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)] === [2024-06-21 16:17:15,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1273938480, now seen corresponding path program 4 times [2024-06-21 16:17:15,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:15,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57843949] [2024-06-21 16:17:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:15,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:16,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:16,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57843949] [2024-06-21 16:17:16,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57843949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:16,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:16,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:16,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498675133] [2024-06-21 16:17:16,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:16,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:16,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:16,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:16,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 376 transitions, 4009 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:16,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:16,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:16,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:17,479 INFO L124 PetriNetUnfolderBase]: 4239/6386 cut-off events. [2024-06-21 16:17:17,479 INFO L125 PetriNetUnfolderBase]: For 1205177/1205179 co-relation queries the response was YES. [2024-06-21 16:17:17,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59735 conditions, 6386 events. 4239/6386 cut-off events. For 1205177/1205179 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34580 event pairs, 1016 based on Foata normal form. 2/6388 useless extension candidates. Maximal degree in co-relation 59591. Up to 6292 conditions per place. [2024-06-21 16:17:17,565 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 346 selfloop transitions, 40 changer transitions 0/389 dead transitions. [2024-06-21 16:17:17,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 389 transitions, 4815 flow [2024-06-21 16:17:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:17:17,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 16:17:17,566 INFO L175 Difference]: Start difference. First operand has 296 places, 376 transitions, 4009 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:17:17,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 389 transitions, 4815 flow [2024-06-21 16:17:19,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 389 transitions, 4670 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:19,670 INFO L231 Difference]: Finished difference. Result has 297 places, 376 transitions, 3950 flow [2024-06-21 16:17:19,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3950, PETRI_PLACES=297, PETRI_TRANSITIONS=376} [2024-06-21 16:17:19,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-21 16:17:19,670 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 376 transitions, 3950 flow [2024-06-21 16:17:19,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:19,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:19,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:19,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:17:19,671 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)] === [2024-06-21 16:17:19,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2091986244, now seen corresponding path program 6 times [2024-06-21 16:17:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:19,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048962373] [2024-06-21 16:17:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:19,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:20,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:20,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048962373] [2024-06-21 16:17:20,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048962373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:20,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:20,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532723148] [2024-06-21 16:17:20,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:20,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:20,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:20,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:20,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 376 transitions, 3950 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:20,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:20,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:21,938 INFO L124 PetriNetUnfolderBase]: 4230/6374 cut-off events. [2024-06-21 16:17:21,938 INFO L125 PetriNetUnfolderBase]: For 1220475/1220477 co-relation queries the response was YES. [2024-06-21 16:17:22,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59549 conditions, 6374 events. 4230/6374 cut-off events. For 1220475/1220477 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34476 event pairs, 985 based on Foata normal form. 5/6379 useless extension candidates. Maximal degree in co-relation 59404. Up to 6218 conditions per place. [2024-06-21 16:17:22,028 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 57 changer transitions 0/395 dead transitions. [2024-06-21 16:17:22,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 395 transitions, 4787 flow [2024-06-21 16:17:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:17:22,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 16:17:22,029 INFO L175 Difference]: Start difference. First operand has 297 places, 376 transitions, 3950 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:17:22,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 395 transitions, 4787 flow [2024-06-21 16:17:24,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 395 transitions, 4643 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 16:17:24,093 INFO L231 Difference]: Finished difference. Result has 297 places, 376 transitions, 3926 flow [2024-06-21 16:17:24,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3926, PETRI_PLACES=297, PETRI_TRANSITIONS=376} [2024-06-21 16:17:24,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-21 16:17:24,093 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 376 transitions, 3926 flow [2024-06-21 16:17:24,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:24,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:24,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:24,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:17:24,093 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)] === [2024-06-21 16:17:24,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:24,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2100574794, now seen corresponding path program 1 times [2024-06-21 16:17:24,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:24,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792153091] [2024-06-21 16:17:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:24,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:25,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:25,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792153091] [2024-06-21 16:17:25,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792153091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:25,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:25,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:25,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036247870] [2024-06-21 16:17:25,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:25,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:25,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:25,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:17:25,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 376 transitions, 3926 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 16:17:25,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:25,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:17:25,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:26,573 INFO L124 PetriNetUnfolderBase]: 4074/6204 cut-off events. [2024-06-21 16:17:26,573 INFO L125 PetriNetUnfolderBase]: For 1229520/1229520 co-relation queries the response was YES. [2024-06-21 16:17:26,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58470 conditions, 6204 events. 4074/6204 cut-off events. For 1229520/1229520 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 34002 event pairs, 977 based on Foata normal form. 2/6192 useless extension candidates. Maximal degree in co-relation 58324. Up to 5938 conditions per place. [2024-06-21 16:17:26,658 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 330 selfloop transitions, 16 changer transitions 0/391 dead transitions. [2024-06-21 16:17:26,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 391 transitions, 4700 flow [2024-06-21 16:17:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 16:17:26,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 16:17:26,659 INFO L175 Difference]: Start difference. First operand has 297 places, 376 transitions, 3926 flow. Second operand 8 states and 128 transitions. [2024-06-21 16:17:26,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 391 transitions, 4700 flow [2024-06-21 16:17:28,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 391 transitions, 4549 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:17:28,833 INFO L231 Difference]: Finished difference. Result has 297 places, 378 transitions, 3868 flow [2024-06-21 16:17:28,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3775, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3868, PETRI_PLACES=297, PETRI_TRANSITIONS=378} [2024-06-21 16:17:28,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-21 16:17:28,834 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 378 transitions, 3868 flow [2024-06-21 16:17:28,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 16:17:28,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:28,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:28,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:17:28,834 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)] === [2024-06-21 16:17:28,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:28,834 INFO L85 PathProgramCache]: Analyzing trace with hash -790056020, now seen corresponding path program 1 times [2024-06-21 16:17:28,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:28,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633869123] [2024-06-21 16:17:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:28,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:29,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:29,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633869123] [2024-06-21 16:17:29,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633869123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:29,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:29,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:29,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908925787] [2024-06-21 16:17:29,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:29,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:29,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:29,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:29,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 378 transitions, 3868 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:29,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:29,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:29,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:31,204 INFO L124 PetriNetUnfolderBase]: 4254/6409 cut-off events. [2024-06-21 16:17:31,204 INFO L125 PetriNetUnfolderBase]: For 1276079/1276081 co-relation queries the response was YES. [2024-06-21 16:17:31,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60356 conditions, 6409 events. 4254/6409 cut-off events. For 1276079/1276081 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 34635 event pairs, 823 based on Foata normal form. 6/6415 useless extension candidates. Maximal degree in co-relation 60209. Up to 6104 conditions per place. [2024-06-21 16:17:31,292 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 330 selfloop transitions, 87 changer transitions 0/420 dead transitions. [2024-06-21 16:17:31,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 420 transitions, 5124 flow [2024-06-21 16:17:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:31,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:17:31,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 16:17:31,293 INFO L175 Difference]: Start difference. First operand has 297 places, 378 transitions, 3868 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:17:31,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 420 transitions, 5124 flow [2024-06-21 16:17:33,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 420 transitions, 5047 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:33,178 INFO L231 Difference]: Finished difference. Result has 300 places, 384 transitions, 4117 flow [2024-06-21 16:17:33,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3791, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4117, PETRI_PLACES=300, PETRI_TRANSITIONS=384} [2024-06-21 16:17:33,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 16:17:33,179 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 384 transitions, 4117 flow [2024-06-21 16:17:33,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:33,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:33,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:33,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:17:33,179 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)] === [2024-06-21 16:17:33,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1789235599, now seen corresponding path program 1 times [2024-06-21 16:17:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:33,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947580518] [2024-06-21 16:17:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:33,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:34,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:34,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947580518] [2024-06-21 16:17:34,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947580518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:34,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:34,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:34,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710665557] [2024-06-21 16:17:34,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:34,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:34,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:34,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:34,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:34,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:34,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 384 transitions, 4117 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:34,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:34,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:34,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:35,562 INFO L124 PetriNetUnfolderBase]: 4324/6506 cut-off events. [2024-06-21 16:17:35,562 INFO L125 PetriNetUnfolderBase]: For 1337692/1337694 co-relation queries the response was YES. [2024-06-21 16:17:35,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62261 conditions, 6506 events. 4324/6506 cut-off events. For 1337692/1337694 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35319 event pairs, 980 based on Foata normal form. 8/6514 useless extension candidates. Maximal degree in co-relation 62113. Up to 5834 conditions per place. [2024-06-21 16:17:35,648 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 307 selfloop transitions, 126 changer transitions 0/436 dead transitions. [2024-06-21 16:17:35,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 436 transitions, 5645 flow [2024-06-21 16:17:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:17:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:17:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-21 16:17:35,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 16:17:35,649 INFO L175 Difference]: Start difference. First operand has 300 places, 384 transitions, 4117 flow. Second operand 11 states and 203 transitions. [2024-06-21 16:17:35,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 436 transitions, 5645 flow [2024-06-21 16:17:37,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 436 transitions, 5444 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:37,373 INFO L231 Difference]: Finished difference. Result has 307 places, 394 transitions, 4381 flow [2024-06-21 16:17:37,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3916, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4381, PETRI_PLACES=307, PETRI_TRANSITIONS=394} [2024-06-21 16:17:37,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-21 16:17:37,373 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 394 transitions, 4381 flow [2024-06-21 16:17:37,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:37,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:37,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:37,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:17:37,373 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)] === [2024-06-21 16:17:37,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash -789787250, now seen corresponding path program 2 times [2024-06-21 16:17:37,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:37,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481437853] [2024-06-21 16:17:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:37,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:38,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:38,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481437853] [2024-06-21 16:17:38,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481437853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:38,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:38,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:38,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124595184] [2024-06-21 16:17:38,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:38,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:38,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:38,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:38,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:38,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:38,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 394 transitions, 4381 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:38,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:38,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:38,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:39,775 INFO L124 PetriNetUnfolderBase]: 4340/6530 cut-off events. [2024-06-21 16:17:39,776 INFO L125 PetriNetUnfolderBase]: For 1354429/1354431 co-relation queries the response was YES. [2024-06-21 16:17:39,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63851 conditions, 6530 events. 4340/6530 cut-off events. For 1354429/1354431 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35443 event pairs, 1014 based on Foata normal form. 6/6536 useless extension candidates. Maximal degree in co-relation 63700. Up to 6307 conditions per place. [2024-06-21 16:17:39,855 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 82 changer transitions 0/428 dead transitions. [2024-06-21 16:17:39,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 428 transitions, 5351 flow [2024-06-21 16:17:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:17:39,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:17:39,856 INFO L175 Difference]: Start difference. First operand has 307 places, 394 transitions, 4381 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:17:39,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 428 transitions, 5351 flow [2024-06-21 16:17:42,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 428 transitions, 5102 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:42,053 INFO L231 Difference]: Finished difference. Result has 309 places, 397 transitions, 4350 flow [2024-06-21 16:17:42,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4350, PETRI_PLACES=309, PETRI_TRANSITIONS=397} [2024-06-21 16:17:42,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 16:17:42,053 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 397 transitions, 4350 flow [2024-06-21 16:17:42,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:42,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:42,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:42,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:17:42,054 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)] === [2024-06-21 16:17:42,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:42,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1798489688, now seen corresponding path program 3 times [2024-06-21 16:17:42,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:42,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926972694] [2024-06-21 16:17:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:42,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:42,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:42,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926972694] [2024-06-21 16:17:42,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926972694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:42,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:42,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:42,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229589968] [2024-06-21 16:17:42,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:42,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:42,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:42,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:42,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:43,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:43,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 397 transitions, 4350 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:43,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:43,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:43,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:44,483 INFO L124 PetriNetUnfolderBase]: 4356/6554 cut-off events. [2024-06-21 16:17:44,483 INFO L125 PetriNetUnfolderBase]: For 1378485/1378487 co-relation queries the response was YES. [2024-06-21 16:17:44,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64077 conditions, 6554 events. 4356/6554 cut-off events. For 1378485/1378487 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35656 event pairs, 1014 based on Foata normal form. 6/6560 useless extension candidates. Maximal degree in co-relation 63924. Up to 6373 conditions per place. [2024-06-21 16:17:44,571 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 67 changer transitions 0/425 dead transitions. [2024-06-21 16:17:44,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 425 transitions, 5304 flow [2024-06-21 16:17:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 16:17:44,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 16:17:44,572 INFO L175 Difference]: Start difference. First operand has 309 places, 397 transitions, 4350 flow. Second operand 9 states and 154 transitions. [2024-06-21 16:17:44,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 425 transitions, 5304 flow [2024-06-21 16:17:47,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 425 transitions, 5114 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:47,154 INFO L231 Difference]: Finished difference. Result has 311 places, 400 transitions, 4354 flow [2024-06-21 16:17:47,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4354, PETRI_PLACES=311, PETRI_TRANSITIONS=400} [2024-06-21 16:17:47,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 16:17:47,155 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 400 transitions, 4354 flow [2024-06-21 16:17:47,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:47,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:47,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:47,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:17:47,155 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)] === [2024-06-21 16:17:47,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:47,156 INFO L85 PathProgramCache]: Analyzing trace with hash -671726168, now seen corresponding path program 1 times [2024-06-21 16:17:47,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:47,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28505109] [2024-06-21 16:17:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:47,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:47,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:47,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28505109] [2024-06-21 16:17:47,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28505109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:47,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:47,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:47,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240412342] [2024-06-21 16:17:47,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:47,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:47,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:47,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:47,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:47,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 400 transitions, 4354 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:47,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:47,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:47,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:49,131 INFO L124 PetriNetUnfolderBase]: 4382/6591 cut-off events. [2024-06-21 16:17:49,131 INFO L125 PetriNetUnfolderBase]: For 1405867/1405869 co-relation queries the response was YES. [2024-06-21 16:17:49,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64817 conditions, 6591 events. 4382/6591 cut-off events. For 1405867/1405869 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35821 event pairs, 1019 based on Foata normal form. 4/6595 useless extension candidates. Maximal degree in co-relation 64663. Up to 6273 conditions per place. [2024-06-21 16:17:49,225 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 79 changer transitions 0/439 dead transitions. [2024-06-21 16:17:49,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 439 transitions, 5978 flow [2024-06-21 16:17:49,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:49,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:17:49,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 16:17:49,228 INFO L175 Difference]: Start difference. First operand has 311 places, 400 transitions, 4354 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:17:49,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 439 transitions, 5978 flow [2024-06-21 16:17:51,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 439 transitions, 5812 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:51,551 INFO L231 Difference]: Finished difference. Result has 314 places, 412 transitions, 4671 flow [2024-06-21 16:17:51,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4188, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4671, PETRI_PLACES=314, PETRI_TRANSITIONS=412} [2024-06-21 16:17:51,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 16:17:51,552 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 412 transitions, 4671 flow [2024-06-21 16:17:51,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:51,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:51,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:51,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:17:51,552 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)] === [2024-06-21 16:17:51,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:51,553 INFO L85 PathProgramCache]: Analyzing trace with hash -472274431, now seen corresponding path program 1 times [2024-06-21 16:17:51,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:51,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929592784] [2024-06-21 16:17:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:51,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:52,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:52,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929592784] [2024-06-21 16:17:52,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929592784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:52,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:52,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:52,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100878518] [2024-06-21 16:17:52,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:52,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:52,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:52,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:52,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:52,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 412 transitions, 4671 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:52,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:52,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:52,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:53,662 INFO L124 PetriNetUnfolderBase]: 4484/6731 cut-off events. [2024-06-21 16:17:53,662 INFO L125 PetriNetUnfolderBase]: For 1507604/1507606 co-relation queries the response was YES. [2024-06-21 16:17:53,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67873 conditions, 6731 events. 4484/6731 cut-off events. For 1507604/1507606 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36618 event pairs, 992 based on Foata normal form. 8/6739 useless extension candidates. Maximal degree in co-relation 67716. Up to 6149 conditions per place. [2024-06-21 16:17:53,760 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 346 selfloop transitions, 104 changer transitions 0/453 dead transitions. [2024-06-21 16:17:53,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 453 transitions, 6291 flow [2024-06-21 16:17:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:17:53,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 16:17:53,760 INFO L175 Difference]: Start difference. First operand has 314 places, 412 transitions, 4671 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:17:53,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 453 transitions, 6291 flow [2024-06-21 16:17:56,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 453 transitions, 6097 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-21 16:17:56,784 INFO L231 Difference]: Finished difference. Result has 320 places, 425 transitions, 4968 flow [2024-06-21 16:17:56,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4968, PETRI_PLACES=320, PETRI_TRANSITIONS=425} [2024-06-21 16:17:56,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 16:17:56,785 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 425 transitions, 4968 flow [2024-06-21 16:17:56,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:56,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:56,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:56,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:17:56,785 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)] === [2024-06-21 16:17:56,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:56,785 INFO L85 PathProgramCache]: Analyzing trace with hash -472274648, now seen corresponding path program 2 times [2024-06-21 16:17:56,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:56,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654898199] [2024-06-21 16:17:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:56,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:57,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654898199] [2024-06-21 16:17:57,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654898199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:57,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:57,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:57,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551599782] [2024-06-21 16:17:57,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:57,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:57,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:57,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:57,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 425 transitions, 4968 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:17:57,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:57,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:57,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:58,787 INFO L124 PetriNetUnfolderBase]: 4494/6746 cut-off events. [2024-06-21 16:17:58,787 INFO L125 PetriNetUnfolderBase]: For 1510723/1510725 co-relation queries the response was YES. [2024-06-21 16:17:58,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67923 conditions, 6746 events. 4494/6746 cut-off events. For 1510723/1510725 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36740 event pairs, 1035 based on Foata normal form. 4/6750 useless extension candidates. Maximal degree in co-relation 67763. Up to 6424 conditions per place. [2024-06-21 16:17:58,884 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 369 selfloop transitions, 81 changer transitions 0/453 dead transitions. [2024-06-21 16:17:58,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 453 transitions, 6434 flow [2024-06-21 16:17:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:17:58,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:17:58,885 INFO L175 Difference]: Start difference. First operand has 320 places, 425 transitions, 4968 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:17:58,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 453 transitions, 6434 flow [2024-06-21 16:18:01,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 453 transitions, 6297 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:18:01,539 INFO L231 Difference]: Finished difference. Result has 324 places, 429 transitions, 5057 flow [2024-06-21 16:18:01,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5057, PETRI_PLACES=324, PETRI_TRANSITIONS=429} [2024-06-21 16:18:01,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-21 16:18:01,539 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 429 transitions, 5057 flow [2024-06-21 16:18:01,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:18:01,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:01,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:01,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:18:01,539 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)] === [2024-06-21 16:18:01,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1523769823, now seen corresponding path program 2 times [2024-06-21 16:18:01,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:01,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428467415] [2024-06-21 16:18:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:01,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:02,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:02,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428467415] [2024-06-21 16:18:02,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428467415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:02,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:02,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:02,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789400928] [2024-06-21 16:18:02,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:02,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:02,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:02,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:02,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 429 transitions, 5057 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:18:02,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:02,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:02,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:03,670 INFO L124 PetriNetUnfolderBase]: 4524/6787 cut-off events. [2024-06-21 16:18:03,670 INFO L125 PetriNetUnfolderBase]: For 1561477/1561479 co-relation queries the response was YES. [2024-06-21 16:18:03,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68233 conditions, 6787 events. 4524/6787 cut-off events. For 1561477/1561479 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36960 event pairs, 1020 based on Foata normal form. 8/6795 useless extension candidates. Maximal degree in co-relation 68072. Up to 6185 conditions per place. [2024-06-21 16:18:03,772 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 362 selfloop transitions, 96 changer transitions 0/461 dead transitions. [2024-06-21 16:18:03,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 461 transitions, 6748 flow [2024-06-21 16:18:03,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:18:03,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 16:18:03,773 INFO L175 Difference]: Start difference. First operand has 324 places, 429 transitions, 5057 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:18:03,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 461 transitions, 6748 flow [2024-06-21 16:18:06,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 461 transitions, 6579 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:06,889 INFO L231 Difference]: Finished difference. Result has 327 places, 433 transitions, 5156 flow [2024-06-21 16:18:06,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4888, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5156, PETRI_PLACES=327, PETRI_TRANSITIONS=433} [2024-06-21 16:18:06,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 16:18:06,889 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 433 transitions, 5156 flow [2024-06-21 16:18:06,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:18:06,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:06,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:06,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:18:06,889 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)] === [2024-06-21 16:18:06,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:06,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2114099510, now seen corresponding path program 3 times [2024-06-21 16:18:06,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:06,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806966273] [2024-06-21 16:18:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:06,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:07,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806966273] [2024-06-21 16:18:07,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806966273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:07,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:07,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:07,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522140651] [2024-06-21 16:18:07,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:07,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:07,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:07,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:07,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 433 transitions, 5156 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:18:07,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:07,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:07,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:08,954 INFO L124 PetriNetUnfolderBase]: 4550/6824 cut-off events. [2024-06-21 16:18:08,954 INFO L125 PetriNetUnfolderBase]: For 1579388/1579390 co-relation queries the response was YES. [2024-06-21 16:18:09,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69272 conditions, 6824 events. 4550/6824 cut-off events. For 1579388/1579390 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 37174 event pairs, 1040 based on Foata normal form. 4/6828 useless extension candidates. Maximal degree in co-relation 69110. Up to 6491 conditions per place. [2024-06-21 16:18:09,050 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 373 selfloop transitions, 86 changer transitions 0/462 dead transitions. [2024-06-21 16:18:09,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 462 transitions, 6733 flow [2024-06-21 16:18:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:18:09,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:18:09,051 INFO L175 Difference]: Start difference. First operand has 327 places, 433 transitions, 5156 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:18:09,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 462 transitions, 6733 flow [2024-06-21 16:18:12,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 462 transitions, 6569 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 16:18:12,563 INFO L231 Difference]: Finished difference. Result has 332 places, 441 transitions, 5346 flow [2024-06-21 16:18:12,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5346, PETRI_PLACES=332, PETRI_TRANSITIONS=441} [2024-06-21 16:18:12,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-21 16:18:12,563 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 441 transitions, 5346 flow [2024-06-21 16:18:12,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:18:12,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:12,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:12,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:18:12,563 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)] === [2024-06-21 16:18:12,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2114107167, now seen corresponding path program 3 times [2024-06-21 16:18:12,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:12,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069450210] [2024-06-21 16:18:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:12,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:13,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:13,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069450210] [2024-06-21 16:18:13,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069450210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:13,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:13,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:13,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440762088] [2024-06-21 16:18:13,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:13,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:13,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:13,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:13,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:13,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:13,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 441 transitions, 5346 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:18:13,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:13,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:13,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:14,732 INFO L124 PetriNetUnfolderBase]: 4532/6799 cut-off events. [2024-06-21 16:18:14,733 INFO L125 PetriNetUnfolderBase]: For 1597161/1597163 co-relation queries the response was YES. [2024-06-21 16:18:14,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68674 conditions, 6799 events. 4532/6799 cut-off events. For 1597161/1597163 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 37054 event pairs, 1012 based on Foata normal form. 8/6807 useless extension candidates. Maximal degree in co-relation 68510. Up to 6210 conditions per place. [2024-06-21 16:18:14,823 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 367 selfloop transitions, 96 changer transitions 0/466 dead transitions. [2024-06-21 16:18:14,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 466 transitions, 6768 flow [2024-06-21 16:18:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:18:14,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 16:18:14,824 INFO L175 Difference]: Start difference. First operand has 332 places, 441 transitions, 5346 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:18:14,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 466 transitions, 6768 flow [2024-06-21 16:18:17,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 466 transitions, 6596 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 16:18:17,909 INFO L231 Difference]: Finished difference. Result has 336 places, 441 transitions, 5376 flow [2024-06-21 16:18:17,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5376, PETRI_PLACES=336, PETRI_TRANSITIONS=441} [2024-06-21 16:18:17,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 16:18:17,909 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 441 transitions, 5376 flow [2024-06-21 16:18:17,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:18:17,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:17,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:17,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:18:17,910 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:17,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:17,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1237433332, now seen corresponding path program 1 times [2024-06-21 16:18:17,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:17,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242318872] [2024-06-21 16:18:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:19,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:19,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242318872] [2024-06-21 16:18:19,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242318872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:19,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:19,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:18:19,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534643592] [2024-06-21 16:18:19,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:19,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:18:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:18:19,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:18:19,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:18:19,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 441 transitions, 5376 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:19,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:19,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:18:19,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:21,308 INFO L124 PetriNetUnfolderBase]: 4467/6765 cut-off events. [2024-06-21 16:18:21,308 INFO L125 PetriNetUnfolderBase]: For 1652049/1652051 co-relation queries the response was YES. [2024-06-21 16:18:21,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69301 conditions, 6765 events. 4467/6765 cut-off events. For 1652049/1652051 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37534 event pairs, 888 based on Foata normal form. 12/6767 useless extension candidates. Maximal degree in co-relation 69136. Up to 6014 conditions per place. [2024-06-21 16:18:21,406 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 390 selfloop transitions, 68 changer transitions 0/497 dead transitions. [2024-06-21 16:18:21,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 497 transitions, 6501 flow [2024-06-21 16:18:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:18:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:18:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 238 transitions. [2024-06-21 16:18:21,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-21 16:18:21,407 INFO L175 Difference]: Start difference. First operand has 336 places, 441 transitions, 5376 flow. Second operand 13 states and 238 transitions. [2024-06-21 16:18:21,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 497 transitions, 6501 flow [2024-06-21 16:18:24,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 497 transitions, 6331 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:24,653 INFO L231 Difference]: Finished difference. Result has 343 places, 442 transitions, 5396 flow [2024-06-21 16:18:24,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5206, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5396, PETRI_PLACES=343, PETRI_TRANSITIONS=442} [2024-06-21 16:18:24,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-21 16:18:24,654 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 442 transitions, 5396 flow [2024-06-21 16:18:24,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:24,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:24,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:24,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:18:24,654 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)] === [2024-06-21 16:18:24,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2114362669, now seen corresponding path program 2 times [2024-06-21 16:18:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:24,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850745306] [2024-06-21 16:18:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:24,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:25,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:25,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850745306] [2024-06-21 16:18:25,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850745306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:25,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:25,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:18:25,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773681393] [2024-06-21 16:18:25,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:25,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:18:25,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:25,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:18:25,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:18:25,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:25,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 442 transitions, 5396 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:25,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:25,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:25,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:27,235 INFO L124 PetriNetUnfolderBase]: 4585/6887 cut-off events. [2024-06-21 16:18:27,235 INFO L125 PetriNetUnfolderBase]: For 1637678/1637680 co-relation queries the response was YES. [2024-06-21 16:18:27,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69859 conditions, 6887 events. 4585/6887 cut-off events. For 1637678/1637680 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 37760 event pairs, 989 based on Foata normal form. 4/6891 useless extension candidates. Maximal degree in co-relation 69693. Up to 6583 conditions per place. [2024-06-21 16:18:27,335 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 424 selfloop transitions, 87 changer transitions 0/514 dead transitions. [2024-06-21 16:18:27,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 514 transitions, 7596 flow [2024-06-21 16:18:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 16:18:27,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:18:27,335 INFO L175 Difference]: Start difference. First operand has 343 places, 442 transitions, 5396 flow. Second operand 9 states and 153 transitions. [2024-06-21 16:18:27,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 514 transitions, 7596 flow [2024-06-21 16:18:31,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 514 transitions, 7426 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-21 16:18:31,238 INFO L231 Difference]: Finished difference. Result has 344 places, 480 transitions, 6016 flow [2024-06-21 16:18:31,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6016, PETRI_PLACES=344, PETRI_TRANSITIONS=480} [2024-06-21 16:18:31,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-21 16:18:31,239 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 480 transitions, 6016 flow [2024-06-21 16:18:31,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:31,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:31,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:31,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:18:31,239 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)] === [2024-06-21 16:18:31,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:31,239 INFO L85 PathProgramCache]: Analyzing trace with hash -465046130, now seen corresponding path program 4 times [2024-06-21 16:18:31,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:31,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417304977] [2024-06-21 16:18:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:31,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:32,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:32,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417304977] [2024-06-21 16:18:32,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417304977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:32,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:32,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:18:32,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960717323] [2024-06-21 16:18:32,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:32,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:18:32,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:32,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:18:32,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:18:32,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:32,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 480 transitions, 6016 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:32,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:32,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:32,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:33,858 INFO L124 PetriNetUnfolderBase]: 4601/6911 cut-off events. [2024-06-21 16:18:33,858 INFO L125 PetriNetUnfolderBase]: For 1676808/1676810 co-relation queries the response was YES. [2024-06-21 16:18:33,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70658 conditions, 6911 events. 4601/6911 cut-off events. For 1676808/1676810 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 37824 event pairs, 1034 based on Foata normal form. 6/6917 useless extension candidates. Maximal degree in co-relation 70488. Up to 6730 conditions per place. [2024-06-21 16:18:33,963 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 439 selfloop transitions, 60 changer transitions 0/502 dead transitions. [2024-06-21 16:18:33,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 502 transitions, 7114 flow [2024-06-21 16:18:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 16:18:33,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-21 16:18:33,964 INFO L175 Difference]: Start difference. First operand has 344 places, 480 transitions, 6016 flow. Second operand 9 states and 148 transitions. [2024-06-21 16:18:33,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 502 transitions, 7114 flow [2024-06-21 16:18:37,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 502 transitions, 7019 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 16:18:37,714 INFO L231 Difference]: Finished difference. Result has 350 places, 483 transitions, 6107 flow [2024-06-21 16:18:37,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5921, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6107, PETRI_PLACES=350, PETRI_TRANSITIONS=483} [2024-06-21 16:18:37,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-21 16:18:37,715 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 483 transitions, 6107 flow [2024-06-21 16:18:37,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:37,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:37,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:37,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:18:37,715 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)] === [2024-06-21 16:18:37,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:37,715 INFO L85 PathProgramCache]: Analyzing trace with hash 750055327, now seen corresponding path program 3 times [2024-06-21 16:18:37,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:37,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131673016] [2024-06-21 16:18:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:37,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:38,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:38,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131673016] [2024-06-21 16:18:38,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131673016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:38,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:38,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:18:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943955572] [2024-06-21 16:18:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:18:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:18:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:18:38,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:38,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 483 transitions, 6107 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:38,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:38,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:38,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:40,323 INFO L124 PetriNetUnfolderBase]: 4611/6925 cut-off events. [2024-06-21 16:18:40,324 INFO L125 PetriNetUnfolderBase]: For 1695712/1695714 co-relation queries the response was YES. [2024-06-21 16:18:40,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71074 conditions, 6925 events. 4611/6925 cut-off events. For 1695712/1695714 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37966 event pairs, 991 based on Foata normal form. 4/6929 useless extension candidates. Maximal degree in co-relation 70902. Up to 6622 conditions per place. [2024-06-21 16:18:40,426 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 430 selfloop transitions, 89 changer transitions 0/522 dead transitions. [2024-06-21 16:18:40,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 522 transitions, 7941 flow [2024-06-21 16:18:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 16:18:40,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 16:18:40,427 INFO L175 Difference]: Start difference. First operand has 350 places, 483 transitions, 6107 flow. Second operand 9 states and 154 transitions. [2024-06-21 16:18:40,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 522 transitions, 7941 flow [2024-06-21 16:18:43,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 522 transitions, 7783 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:43,978 INFO L231 Difference]: Finished difference. Result has 353 places, 489 transitions, 6240 flow [2024-06-21 16:18:43,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5949, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6240, PETRI_PLACES=353, PETRI_TRANSITIONS=489} [2024-06-21 16:18:43,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-21 16:18:43,978 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 489 transitions, 6240 flow [2024-06-21 16:18:43,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:43,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:43,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:43,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:18:43,979 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)] === [2024-06-21 16:18:43,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:43,979 INFO L85 PathProgramCache]: Analyzing trace with hash -465045789, now seen corresponding path program 4 times [2024-06-21 16:18:43,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:43,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911329408] [2024-06-21 16:18:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:43,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:44,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:44,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911329408] [2024-06-21 16:18:44,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911329408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:44,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:44,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:18:44,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265156565] [2024-06-21 16:18:44,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:44,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:18:44,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:44,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:18:44,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:18:44,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:44,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 489 transitions, 6240 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:44,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:44,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:44,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:46,455 INFO L124 PetriNetUnfolderBase]: 4621/6939 cut-off events. [2024-06-21 16:18:46,455 INFO L125 PetriNetUnfolderBase]: For 1725858/1725860 co-relation queries the response was YES. [2024-06-21 16:18:46,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71585 conditions, 6939 events. 4621/6939 cut-off events. For 1725858/1725860 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 38042 event pairs, 993 based on Foata normal form. 4/6943 useless extension candidates. Maximal degree in co-relation 71411. Up to 6617 conditions per place. [2024-06-21 16:18:46,559 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 423 selfloop transitions, 100 changer transitions 0/526 dead transitions. [2024-06-21 16:18:46,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 526 transitions, 8073 flow [2024-06-21 16:18:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 16:18:46,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 16:18:46,560 INFO L175 Difference]: Start difference. First operand has 353 places, 489 transitions, 6240 flow. Second operand 9 states and 155 transitions. [2024-06-21 16:18:46,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 526 transitions, 8073 flow [2024-06-21 16:18:49,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 526 transitions, 7886 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:49,957 INFO L231 Difference]: Finished difference. Result has 357 places, 493 transitions, 6346 flow [2024-06-21 16:18:49,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6053, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6346, PETRI_PLACES=357, PETRI_TRANSITIONS=493} [2024-06-21 16:18:49,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 16:18:49,957 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 493 transitions, 6346 flow [2024-06-21 16:18:49,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:49,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:49,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:49,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:18:49,958 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)] === [2024-06-21 16:18:49,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:49,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2018028934, now seen corresponding path program 4 times [2024-06-21 16:18:49,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:49,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280169717] [2024-06-21 16:18:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:49,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:50,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:50,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280169717] [2024-06-21 16:18:50,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280169717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:50,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:50,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:50,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891566153] [2024-06-21 16:18:50,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:50,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:50,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:50,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:50,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:50,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:50,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 493 transitions, 6346 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:18:50,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:50,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:50,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:52,219 INFO L124 PetriNetUnfolderBase]: 4634/6956 cut-off events. [2024-06-21 16:18:52,220 INFO L125 PetriNetUnfolderBase]: For 1755712/1755712 co-relation queries the response was YES. [2024-06-21 16:18:52,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72205 conditions, 6956 events. 4634/6956 cut-off events. For 1755712/1755712 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38092 event pairs, 1027 based on Foata normal form. 1/6957 useless extension candidates. Maximal degree in co-relation 72030. Up to 6888 conditions per place. [2024-06-21 16:18:52,316 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 35 changer transitions 0/520 dead transitions. [2024-06-21 16:18:52,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 520 transitions, 7784 flow [2024-06-21 16:18:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:18:52,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 16:18:52,317 INFO L175 Difference]: Start difference. First operand has 357 places, 493 transitions, 6346 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:18:52,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 520 transitions, 7784 flow [2024-06-21 16:18:56,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 520 transitions, 7531 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:56,029 INFO L231 Difference]: Finished difference. Result has 359 places, 499 transitions, 6319 flow [2024-06-21 16:18:56,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6093, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6319, PETRI_PLACES=359, PETRI_TRANSITIONS=499} [2024-06-21 16:18:56,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 16:18:56,029 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 499 transitions, 6319 flow [2024-06-21 16:18:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:18:56,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:56,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:56,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:18:56,030 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)] === [2024-06-21 16:18:56,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:56,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1946686912, now seen corresponding path program 5 times [2024-06-21 16:18:56,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:56,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566195334] [2024-06-21 16:18:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:56,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:56,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:56,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566195334] [2024-06-21 16:18:56,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566195334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:56,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:56,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:56,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204059742] [2024-06-21 16:18:56,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:56,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:56,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:56,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:56,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:56,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:56,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 499 transitions, 6319 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:18:56,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:56,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:56,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:58,314 INFO L124 PetriNetUnfolderBase]: 4639/6963 cut-off events. [2024-06-21 16:18:58,314 INFO L125 PetriNetUnfolderBase]: For 1787227/1787227 co-relation queries the response was YES. [2024-06-21 16:18:58,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72393 conditions, 6963 events. 4639/6963 cut-off events. For 1787227/1787227 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38147 event pairs, 1033 based on Foata normal form. 1/6964 useless extension candidates. Maximal degree in co-relation 72216. Up to 6912 conditions per place. [2024-06-21 16:18:58,408 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 486 selfloop transitions, 30 changer transitions 0/519 dead transitions. [2024-06-21 16:18:58,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 519 transitions, 7472 flow [2024-06-21 16:18:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:18:58,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 16:18:58,412 INFO L175 Difference]: Start difference. First operand has 359 places, 499 transitions, 6319 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:18:58,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 519 transitions, 7472 flow [2024-06-21 16:19:02,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 519 transitions, 7350 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 16:19:02,440 INFO L231 Difference]: Finished difference. Result has 363 places, 502 transitions, 6348 flow [2024-06-21 16:19:02,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6219, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6348, PETRI_PLACES=363, PETRI_TRANSITIONS=502} [2024-06-21 16:19:02,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-21 16:19:02,440 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 502 transitions, 6348 flow [2024-06-21 16:19:02,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:02,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:02,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:02,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:19:02,441 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)] === [2024-06-21 16:19:02,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:02,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2047940008, now seen corresponding path program 6 times [2024-06-21 16:19:02,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:02,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065151993] [2024-06-21 16:19:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:02,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:03,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:03,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065151993] [2024-06-21 16:19:03,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065151993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:03,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:03,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:03,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698818393] [2024-06-21 16:19:03,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:03,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:03,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:03,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:03,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:03,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:03,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 502 transitions, 6348 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:03,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:03,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:03,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:04,709 INFO L124 PetriNetUnfolderBase]: 4644/6970 cut-off events. [2024-06-21 16:19:04,709 INFO L125 PetriNetUnfolderBase]: For 1817177/1817177 co-relation queries the response was YES. [2024-06-21 16:19:04,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72716 conditions, 6970 events. 4644/6970 cut-off events. For 1817177/1817177 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38188 event pairs, 1032 based on Foata normal form. 1/6971 useless extension candidates. Maximal degree in co-relation 72537. Up to 6861 conditions per place. [2024-06-21 16:19:04,805 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 473 selfloop transitions, 56 changer transitions 0/532 dead transitions. [2024-06-21 16:19:04,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 532 transitions, 8082 flow [2024-06-21 16:19:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:19:04,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:19:04,806 INFO L175 Difference]: Start difference. First operand has 363 places, 502 transitions, 6348 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:19:04,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 532 transitions, 8082 flow [2024-06-21 16:19:08,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 532 transitions, 7994 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:08,512 INFO L231 Difference]: Finished difference. Result has 366 places, 510 transitions, 6570 flow [2024-06-21 16:19:08,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6260, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6570, PETRI_PLACES=366, PETRI_TRANSITIONS=510} [2024-06-21 16:19:08,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-21 16:19:08,512 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 510 transitions, 6570 flow [2024-06-21 16:19:08,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:08,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:08,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:08,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:19:08,513 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)] === [2024-06-21 16:19:08,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:08,513 INFO L85 PathProgramCache]: Analyzing trace with hash -854828845, now seen corresponding path program 4 times [2024-06-21 16:19:08,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:08,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105044826] [2024-06-21 16:19:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:08,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:09,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:09,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105044826] [2024-06-21 16:19:09,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105044826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:09,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:09,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:09,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791544463] [2024-06-21 16:19:09,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:09,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:09,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:09,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:09,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 510 transitions, 6570 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:09,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:09,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:09,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:10,848 INFO L124 PetriNetUnfolderBase]: 4627/6946 cut-off events. [2024-06-21 16:19:10,849 INFO L125 PetriNetUnfolderBase]: For 1845019/1845019 co-relation queries the response was YES. [2024-06-21 16:19:10,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72687 conditions, 6946 events. 4627/6946 cut-off events. For 1845019/1845019 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38077 event pairs, 1008 based on Foata normal form. 3/6949 useless extension candidates. Maximal degree in co-relation 72506. Up to 6843 conditions per place. [2024-06-21 16:19:10,954 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 45 changer transitions 0/532 dead transitions. [2024-06-21 16:19:10,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 532 transitions, 7919 flow [2024-06-21 16:19:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:19:10,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:19:10,955 INFO L175 Difference]: Start difference. First operand has 366 places, 510 transitions, 6570 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:19:10,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 532 transitions, 7919 flow [2024-06-21 16:19:15,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 532 transitions, 7685 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-21 16:19:15,435 INFO L231 Difference]: Finished difference. Result has 369 places, 510 transitions, 6436 flow [2024-06-21 16:19:15,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6436, PETRI_PLACES=369, PETRI_TRANSITIONS=510} [2024-06-21 16:19:15,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 16:19:15,436 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 510 transitions, 6436 flow [2024-06-21 16:19:15,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:15,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:15,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:15,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:19:15,436 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)] === [2024-06-21 16:19:15,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash -854829062, now seen corresponding path program 7 times [2024-06-21 16:19:15,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:15,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197343171] [2024-06-21 16:19:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:15,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:16,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:16,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197343171] [2024-06-21 16:19:16,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197343171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:16,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:16,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:16,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717956360] [2024-06-21 16:19:16,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:16,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:16,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:16,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:16,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 510 transitions, 6436 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:16,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:16,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:16,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:17,740 INFO L124 PetriNetUnfolderBase]: 4624/6942 cut-off events. [2024-06-21 16:19:17,740 INFO L125 PetriNetUnfolderBase]: For 1852471/1852471 co-relation queries the response was YES. [2024-06-21 16:19:17,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72523 conditions, 6942 events. 4624/6942 cut-off events. For 1852471/1852471 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38004 event pairs, 1028 based on Foata normal form. 1/6943 useless extension candidates. Maximal degree in co-relation 72341. Up to 6834 conditions per place. [2024-06-21 16:19:17,839 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 470 selfloop transitions, 56 changer transitions 0/529 dead transitions. [2024-06-21 16:19:17,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 529 transitions, 7791 flow [2024-06-21 16:19:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:19:17,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:19:17,840 INFO L175 Difference]: Start difference. First operand has 369 places, 510 transitions, 6436 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:19:17,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 529 transitions, 7791 flow [2024-06-21 16:19:21,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 529 transitions, 7275 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-21 16:19:21,976 INFO L231 Difference]: Finished difference. Result has 365 places, 511 transitions, 6067 flow [2024-06-21 16:19:21,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5920, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6067, PETRI_PLACES=365, PETRI_TRANSITIONS=511} [2024-06-21 16:19:21,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-21 16:19:21,976 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 511 transitions, 6067 flow [2024-06-21 16:19:21,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:21,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:21,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:21,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:19:21,977 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)] === [2024-06-21 16:19:21,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:21,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1256436889, now seen corresponding path program 5 times [2024-06-21 16:19:21,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:21,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670607980] [2024-06-21 16:19:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:21,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:22,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:22,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670607980] [2024-06-21 16:19:22,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670607980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:22,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:22,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857738651] [2024-06-21 16:19:22,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:22,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:22,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:22,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:22,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 511 transitions, 6067 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:22,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:22,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:22,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:24,287 INFO L124 PetriNetUnfolderBase]: 4663/6996 cut-off events. [2024-06-21 16:19:24,287 INFO L125 PetriNetUnfolderBase]: For 1913982/1913982 co-relation queries the response was YES. [2024-06-21 16:19:24,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73092 conditions, 6996 events. 4663/6996 cut-off events. For 1913982/1913982 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 38356 event pairs, 1014 based on Foata normal form. 3/6999 useless extension candidates. Maximal degree in co-relation 72911. Up to 6928 conditions per place. [2024-06-21 16:19:24,383 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 501 selfloop transitions, 35 changer transitions 0/539 dead transitions. [2024-06-21 16:19:24,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 539 transitions, 7575 flow [2024-06-21 16:19:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:19:24,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 16:19:24,383 INFO L175 Difference]: Start difference. First operand has 365 places, 511 transitions, 6067 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:19:24,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 539 transitions, 7575 flow [2024-06-21 16:19:27,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 539 transitions, 7463 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:19:27,526 INFO L231 Difference]: Finished difference. Result has 369 places, 520 transitions, 6207 flow [2024-06-21 16:19:27,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6207, PETRI_PLACES=369, PETRI_TRANSITIONS=520} [2024-06-21 16:19:27,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 16:19:27,527 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 520 transitions, 6207 flow [2024-06-21 16:19:27,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:27,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:27,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:27,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:19:27,527 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)] === [2024-06-21 16:19:27,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:27,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1122895106, now seen corresponding path program 8 times [2024-06-21 16:19:27,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:27,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404548818] [2024-06-21 16:19:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:27,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:28,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:28,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404548818] [2024-06-21 16:19:28,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404548818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:28,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:28,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:28,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735970965] [2024-06-21 16:19:28,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:28,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:28,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:28,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:28,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:28,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:28,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 520 transitions, 6207 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:28,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:28,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:28,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:29,872 INFO L124 PetriNetUnfolderBase]: 4676/7014 cut-off events. [2024-06-21 16:19:29,872 INFO L125 PetriNetUnfolderBase]: For 1939450/1939450 co-relation queries the response was YES. [2024-06-21 16:19:29,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73693 conditions, 7014 events. 4676/7014 cut-off events. For 1939450/1939450 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38478 event pairs, 1022 based on Foata normal form. 1/7015 useless extension candidates. Maximal degree in co-relation 73510. Up to 6953 conditions per place. [2024-06-21 16:19:29,973 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 501 selfloop transitions, 37 changer transitions 0/541 dead transitions. [2024-06-21 16:19:29,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 541 transitions, 7677 flow [2024-06-21 16:19:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:19:29,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 16:19:29,974 INFO L175 Difference]: Start difference. First operand has 369 places, 520 transitions, 6207 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:19:29,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 541 transitions, 7677 flow [2024-06-21 16:19:33,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 541 transitions, 7589 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 16:19:33,662 INFO L231 Difference]: Finished difference. Result has 374 places, 526 transitions, 6347 flow [2024-06-21 16:19:33,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6347, PETRI_PLACES=374, PETRI_TRANSITIONS=526} [2024-06-21 16:19:33,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-21 16:19:33,662 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 526 transitions, 6347 flow [2024-06-21 16:19:33,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:33,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:33,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:33,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:19:33,663 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)] === [2024-06-21 16:19:33,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1122449419, now seen corresponding path program 6 times [2024-06-21 16:19:33,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:33,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574767208] [2024-06-21 16:19:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:33,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:34,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:34,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574767208] [2024-06-21 16:19:34,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574767208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:34,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:34,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079865444] [2024-06-21 16:19:34,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:34,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:34,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:34,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:34,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:34,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 526 transitions, 6347 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:34,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:34,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:35,998 INFO L124 PetriNetUnfolderBase]: 4667/7002 cut-off events. [2024-06-21 16:19:35,998 INFO L125 PetriNetUnfolderBase]: For 1963863/1963863 co-relation queries the response was YES. [2024-06-21 16:19:36,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73479 conditions, 7002 events. 4667/7002 cut-off events. For 1963863/1963863 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38389 event pairs, 1018 based on Foata normal form. 3/7005 useless extension candidates. Maximal degree in co-relation 73294. Up to 6951 conditions per place. [2024-06-21 16:19:36,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 29 changer transitions 0/542 dead transitions. [2024-06-21 16:19:36,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 542 transitions, 7468 flow [2024-06-21 16:19:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:19:36,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 16:19:36,100 INFO L175 Difference]: Start difference. First operand has 374 places, 526 transitions, 6347 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:19:36,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 542 transitions, 7468 flow [2024-06-21 16:19:39,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 542 transitions, 7342 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 16:19:39,713 INFO L231 Difference]: Finished difference. Result has 377 places, 526 transitions, 6286 flow [2024-06-21 16:19:39,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6286, PETRI_PLACES=377, PETRI_TRANSITIONS=526} [2024-06-21 16:19:39,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-21 16:19:39,713 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 526 transitions, 6286 flow [2024-06-21 16:19:39,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:39,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:39,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:39,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:19:39,713 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)] === [2024-06-21 16:19:39,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:39,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1862855448, now seen corresponding path program 9 times [2024-06-21 16:19:39,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:39,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306167740] [2024-06-21 16:19:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:39,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:40,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:40,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306167740] [2024-06-21 16:19:40,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306167740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:40,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:40,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:40,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724988844] [2024-06-21 16:19:40,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:40,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:40,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:40,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:40,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:40,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:40,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 526 transitions, 6286 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:40,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:40,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:40,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:42,019 INFO L124 PetriNetUnfolderBase]: 4664/6998 cut-off events. [2024-06-21 16:19:42,019 INFO L125 PetriNetUnfolderBase]: For 1973842/1973842 co-relation queries the response was YES. [2024-06-21 16:19:42,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73482 conditions, 6998 events. 4664/6998 cut-off events. For 1973842/1973842 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38360 event pairs, 1021 based on Foata normal form. 1/6999 useless extension candidates. Maximal degree in co-relation 73296. Up to 6947 conditions per place. [2024-06-21 16:19:42,125 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 508 selfloop transitions, 29 changer transitions 0/540 dead transitions. [2024-06-21 16:19:42,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 540 transitions, 7394 flow [2024-06-21 16:19:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 16:19:42,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 16:19:42,126 INFO L175 Difference]: Start difference. First operand has 377 places, 526 transitions, 6286 flow. Second operand 8 states and 127 transitions. [2024-06-21 16:19:42,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 540 transitions, 7394 flow [2024-06-21 16:19:45,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 540 transitions, 7302 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:45,768 INFO L231 Difference]: Finished difference. Result has 378 places, 526 transitions, 6258 flow [2024-06-21 16:19:45,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6258, PETRI_PLACES=378, PETRI_TRANSITIONS=526} [2024-06-21 16:19:45,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 16:19:45,769 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 526 transitions, 6258 flow [2024-06-21 16:19:45,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:19:45,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:45,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:45,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:19:45,769 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:45,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:45,769 INFO L85 PathProgramCache]: Analyzing trace with hash -465815854, now seen corresponding path program 2 times [2024-06-21 16:19:45,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:45,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548983940] [2024-06-21 16:19:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:45,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:47,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:47,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548983940] [2024-06-21 16:19:47,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548983940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:47,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:47,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:47,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974033738] [2024-06-21 16:19:47,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:47,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:47,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:47,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:47,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:19:47,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 526 transitions, 6258 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:47,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:47,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:19:47,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:48,995 INFO L124 PetriNetUnfolderBase]: 4586/6950 cut-off events. [2024-06-21 16:19:48,995 INFO L125 PetriNetUnfolderBase]: For 2057296/2057296 co-relation queries the response was YES. [2024-06-21 16:19:49,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73666 conditions, 6950 events. 4586/6950 cut-off events. For 2057296/2057296 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 38792 event pairs, 969 based on Foata normal form. 12/6962 useless extension candidates. Maximal degree in co-relation 73479. Up to 6452 conditions per place. [2024-06-21 16:19:49,105 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 486 selfloop transitions, 35 changer transitions 0/569 dead transitions. [2024-06-21 16:19:49,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 569 transitions, 7464 flow [2024-06-21 16:19:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-21 16:19:49,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 16:19:49,106 INFO L175 Difference]: Start difference. First operand has 378 places, 526 transitions, 6258 flow. Second operand 11 states and 196 transitions. [2024-06-21 16:19:49,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 569 transitions, 7464 flow [2024-06-21 16:19:52,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 569 transitions, 7392 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:52,747 INFO L231 Difference]: Finished difference. Result has 382 places, 527 transitions, 6312 flow [2024-06-21 16:19:52,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6312, PETRI_PLACES=382, PETRI_TRANSITIONS=527} [2024-06-21 16:19:52,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-21 16:19:52,747 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 527 transitions, 6312 flow [2024-06-21 16:19:52,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:52,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:52,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:52,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:19:52,748 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:52,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1465940292, now seen corresponding path program 3 times [2024-06-21 16:19:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:52,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807635211] [2024-06-21 16:19:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:52,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:54,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807635211] [2024-06-21 16:19:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807635211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:54,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:54,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:54,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260226237] [2024-06-21 16:19:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:54,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:54,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:54,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:19:54,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 527 transitions, 6312 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:54,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:54,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:19:54,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:56,005 INFO L124 PetriNetUnfolderBase]: 4668/7092 cut-off events. [2024-06-21 16:19:56,005 INFO L125 PetriNetUnfolderBase]: For 2094264/2094264 co-relation queries the response was YES. [2024-06-21 16:19:56,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74792 conditions, 7092 events. 4668/7092 cut-off events. For 2094264/2094264 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39992 event pairs, 989 based on Foata normal form. 12/7104 useless extension candidates. Maximal degree in co-relation 74604. Up to 6585 conditions per place. [2024-06-21 16:19:56,123 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 489 selfloop transitions, 33 changer transitions 0/570 dead transitions. [2024-06-21 16:19:56,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 570 transitions, 7525 flow [2024-06-21 16:19:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 16:19:56,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 16:19:56,124 INFO L175 Difference]: Start difference. First operand has 382 places, 527 transitions, 6312 flow. Second operand 11 states and 192 transitions. [2024-06-21 16:19:56,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 570 transitions, 7525 flow [2024-06-21 16:19:59,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 570 transitions, 7419 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:59,699 INFO L231 Difference]: Finished difference. Result has 384 places, 529 transitions, 6338 flow [2024-06-21 16:19:59,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6206, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6338, PETRI_PLACES=384, PETRI_TRANSITIONS=529} [2024-06-21 16:19:59,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-21 16:19:59,700 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 529 transitions, 6338 flow [2024-06-21 16:19:59,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:59,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:59,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:59,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:19:59,700 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:59,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:59,700 INFO L85 PathProgramCache]: Analyzing trace with hash 474319472, now seen corresponding path program 4 times [2024-06-21 16:19:59,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:59,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041763141] [2024-06-21 16:19:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:59,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:01,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:01,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041763141] [2024-06-21 16:20:01,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041763141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:01,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:01,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:01,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85777874] [2024-06-21 16:20:01,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:01,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:01,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:01,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:01,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:20:01,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 529 transitions, 6338 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:01,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:01,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:20:01,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:03,121 INFO L124 PetriNetUnfolderBase]: 4709/7163 cut-off events. [2024-06-21 16:20:03,121 INFO L125 PetriNetUnfolderBase]: For 2129118/2129118 co-relation queries the response was YES. [2024-06-21 16:20:03,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75418 conditions, 7163 events. 4709/7163 cut-off events. For 2129118/2129118 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40545 event pairs, 1014 based on Foata normal form. 12/7175 useless extension candidates. Maximal degree in co-relation 75229. Up to 6652 conditions per place. [2024-06-21 16:20:03,235 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 491 selfloop transitions, 42 changer transitions 0/581 dead transitions. [2024-06-21 16:20:03,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 581 transitions, 7594 flow [2024-06-21 16:20:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:20:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:20:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 229 transitions. [2024-06-21 16:20:03,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194139194139194 [2024-06-21 16:20:03,236 INFO L175 Difference]: Start difference. First operand has 384 places, 529 transitions, 6338 flow. Second operand 13 states and 229 transitions. [2024-06-21 16:20:03,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 581 transitions, 7594 flow [2024-06-21 16:20:07,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 581 transitions, 7499 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:07,290 INFO L231 Difference]: Finished difference. Result has 388 places, 530 transitions, 6385 flow [2024-06-21 16:20:07,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6243, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6385, PETRI_PLACES=388, PETRI_TRANSITIONS=530} [2024-06-21 16:20:07,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 16:20:07,291 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 530 transitions, 6385 flow [2024-06-21 16:20:07,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:07,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:07,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:07,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:20:07,291 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:07,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:07,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1779898992, now seen corresponding path program 5 times [2024-06-21 16:20:07,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:07,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396712395] [2024-06-21 16:20:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:07,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:08,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:08,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396712395] [2024-06-21 16:20:08,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396712395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:08,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:08,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:08,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506493131] [2024-06-21 16:20:08,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:08,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:08,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:08,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:08,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:08,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:20:08,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 530 transitions, 6385 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:08,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:08,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:20:08,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:10,579 INFO L124 PetriNetUnfolderBase]: 4750/7234 cut-off events. [2024-06-21 16:20:10,579 INFO L125 PetriNetUnfolderBase]: For 2164310/2164310 co-relation queries the response was YES. [2024-06-21 16:20:10,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76009 conditions, 7234 events. 4750/7234 cut-off events. For 2164310/2164310 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41079 event pairs, 1023 based on Foata normal form. 12/7246 useless extension candidates. Maximal degree in co-relation 75819. Up to 6827 conditions per place. [2024-06-21 16:20:10,699 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 501 selfloop transitions, 23 changer transitions 0/572 dead transitions. [2024-06-21 16:20:10,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 572 transitions, 7579 flow [2024-06-21 16:20:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-21 16:20:10,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-21 16:20:10,700 INFO L175 Difference]: Start difference. First operand has 388 places, 530 transitions, 6385 flow. Second operand 11 states and 190 transitions. [2024-06-21 16:20:10,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 572 transitions, 7579 flow [2024-06-21 16:20:15,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 572 transitions, 7457 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-21 16:20:15,576 INFO L231 Difference]: Finished difference. Result has 388 places, 531 transitions, 6353 flow [2024-06-21 16:20:15,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6263, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6353, PETRI_PLACES=388, PETRI_TRANSITIONS=531} [2024-06-21 16:20:15,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 16:20:15,576 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 531 transitions, 6353 flow [2024-06-21 16:20:15,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:15,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:15,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:15,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:20:15,576 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:15,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:15,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1218038384, now seen corresponding path program 6 times [2024-06-21 16:20:15,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:15,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764859422] [2024-06-21 16:20:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:15,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:16,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:16,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764859422] [2024-06-21 16:20:16,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764859422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:16,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:16,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552154990] [2024-06-21 16:20:16,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:16,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:16,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:16,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:20:16,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 531 transitions, 6353 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:16,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:16,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:20:16,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:18,832 INFO L124 PetriNetUnfolderBase]: 4730/7202 cut-off events. [2024-06-21 16:20:18,832 INFO L125 PetriNetUnfolderBase]: For 2141340/2141340 co-relation queries the response was YES. [2024-06-21 16:20:18,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74688 conditions, 7202 events. 4730/7202 cut-off events. For 2141340/2141340 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40944 event pairs, 1015 based on Foata normal form. 12/7214 useless extension candidates. Maximal degree in co-relation 74497. Up to 6768 conditions per place. [2024-06-21 16:20:18,943 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 500 selfloop transitions, 26 changer transitions 0/574 dead transitions. [2024-06-21 16:20:18,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 574 transitions, 7530 flow [2024-06-21 16:20:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 16:20:18,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 16:20:18,944 INFO L175 Difference]: Start difference. First operand has 388 places, 531 transitions, 6353 flow. Second operand 11 states and 192 transitions. [2024-06-21 16:20:18,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 574 transitions, 7530 flow [2024-06-21 16:20:23,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 574 transitions, 7452 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:23,079 INFO L231 Difference]: Finished difference. Result has 392 places, 533 transitions, 6359 flow [2024-06-21 16:20:23,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6359, PETRI_PLACES=392, PETRI_TRANSITIONS=533} [2024-06-21 16:20:23,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-21 16:20:23,079 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 533 transitions, 6359 flow [2024-06-21 16:20:23,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:23,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:23,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:23,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:20:23,080 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:23,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:23,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1465932635, now seen corresponding path program 1 times [2024-06-21 16:20:23,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:23,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836268548] [2024-06-21 16:20:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:23,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:24,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:24,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836268548] [2024-06-21 16:20:24,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836268548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:24,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:24,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:24,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11251623] [2024-06-21 16:20:24,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:24,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:24,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:24,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:24,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:20:24,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 533 transitions, 6359 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:24,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:24,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:20:24,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:26,375 INFO L124 PetriNetUnfolderBase]: 4838/7386 cut-off events. [2024-06-21 16:20:26,375 INFO L125 PetriNetUnfolderBase]: For 2176088/2176088 co-relation queries the response was YES. [2024-06-21 16:20:26,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75440 conditions, 7386 events. 4838/7386 cut-off events. For 2176088/2176088 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42402 event pairs, 1058 based on Foata normal form. 16/7402 useless extension candidates. Maximal degree in co-relation 75246. Up to 6635 conditions per place. [2024-06-21 16:20:26,497 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 490 selfloop transitions, 40 changer transitions 0/578 dead transitions. [2024-06-21 16:20:26,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 578 transitions, 7612 flow [2024-06-21 16:20:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-21 16:20:26,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 16:20:26,498 INFO L175 Difference]: Start difference. First operand has 392 places, 533 transitions, 6359 flow. Second operand 11 states and 196 transitions. [2024-06-21 16:20:26,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 578 transitions, 7612 flow [2024-06-21 16:20:30,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 578 transitions, 7431 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:30,448 INFO L231 Difference]: Finished difference. Result has 395 places, 535 transitions, 6339 flow [2024-06-21 16:20:30,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6339, PETRI_PLACES=395, PETRI_TRANSITIONS=535} [2024-06-21 16:20:30,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-21 16:20:30,449 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 535 transitions, 6339 flow [2024-06-21 16:20:30,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:30,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:30,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:30,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:20:30,449 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:30,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:30,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1270890396, now seen corresponding path program 7 times [2024-06-21 16:20:30,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:30,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594206825] [2024-06-21 16:20:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:30,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:31,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:31,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594206825] [2024-06-21 16:20:31,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594206825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:31,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:31,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:31,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222734090] [2024-06-21 16:20:31,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:31,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:31,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:31,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:31,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:32,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:20:32,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 535 transitions, 6339 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:32,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:32,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:20:32,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:33,822 INFO L124 PetriNetUnfolderBase]: 4818/7354 cut-off events. [2024-06-21 16:20:33,823 INFO L125 PetriNetUnfolderBase]: For 2131404/2131404 co-relation queries the response was YES. [2024-06-21 16:20:33,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73848 conditions, 7354 events. 4818/7354 cut-off events. For 2131404/2131404 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42255 event pairs, 1009 based on Foata normal form. 12/7366 useless extension candidates. Maximal degree in co-relation 73654. Up to 6765 conditions per place. [2024-06-21 16:20:33,944 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 487 selfloop transitions, 40 changer transitions 0/575 dead transitions. [2024-06-21 16:20:33,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 575 transitions, 7389 flow [2024-06-21 16:20:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 16:20:33,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 16:20:33,945 INFO L175 Difference]: Start difference. First operand has 395 places, 535 transitions, 6339 flow. Second operand 11 states and 192 transitions. [2024-06-21 16:20:33,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 575 transitions, 7389 flow [2024-06-21 16:20:38,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 575 transitions, 7267 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-21 16:20:38,344 INFO L231 Difference]: Finished difference. Result has 395 places, 534 transitions, 6187 flow [2024-06-21 16:20:38,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6101, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6187, PETRI_PLACES=395, PETRI_TRANSITIONS=534} [2024-06-21 16:20:38,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-21 16:20:38,344 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 534 transitions, 6187 flow [2024-06-21 16:20:38,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:38,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:38,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:38,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:20:38,345 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)] === [2024-06-21 16:20:38,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:38,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1028529446, now seen corresponding path program 10 times [2024-06-21 16:20:38,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:38,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618781140] [2024-06-21 16:20:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:38,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:38,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:38,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618781140] [2024-06-21 16:20:38,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618781140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:38,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:38,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:38,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921395472] [2024-06-21 16:20:38,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:38,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:38,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:38,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:38,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:38,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:20:38,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 534 transitions, 6187 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:20:38,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:38,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:20:38,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:40,616 INFO L124 PetriNetUnfolderBase]: 4934/7471 cut-off events. [2024-06-21 16:20:40,616 INFO L125 PetriNetUnfolderBase]: For 2001719/2001721 co-relation queries the response was YES. [2024-06-21 16:20:40,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73372 conditions, 7471 events. 4934/7471 cut-off events. For 2001719/2001721 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42351 event pairs, 1108 based on Foata normal form. 3/7474 useless extension candidates. Maximal degree in co-relation 73178. Up to 7418 conditions per place. [2024-06-21 16:20:40,734 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 513 selfloop transitions, 29 changer transitions 0/545 dead transitions. [2024-06-21 16:20:40,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 545 transitions, 7297 flow [2024-06-21 16:20:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 16:20:40,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 16:20:40,736 INFO L175 Difference]: Start difference. First operand has 395 places, 534 transitions, 6187 flow. Second operand 8 states and 123 transitions. [2024-06-21 16:20:40,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 545 transitions, 7297 flow [2024-06-21 16:20:45,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 545 transitions, 7161 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 16:20:45,229 INFO L231 Difference]: Finished difference. Result has 393 places, 534 transitions, 6115 flow [2024-06-21 16:20:45,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6115, PETRI_PLACES=393, PETRI_TRANSITIONS=534} [2024-06-21 16:20:45,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 16:20:45,230 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 534 transitions, 6115 flow [2024-06-21 16:20:45,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:20:45,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:45,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:45,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:20:45,230 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)] === [2024-06-21 16:20:45,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash -99479961, now seen corresponding path program 7 times [2024-06-21 16:20:45,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:45,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168111608] [2024-06-21 16:20:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:45,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:45,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:45,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168111608] [2024-06-21 16:20:45,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168111608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:45,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:45,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555799843] [2024-06-21 16:20:45,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:45,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:20:45,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 534 transitions, 6115 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:20:45,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:45,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:20:45,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:47,524 INFO L124 PetriNetUnfolderBase]: 4949/7491 cut-off events. [2024-06-21 16:20:47,524 INFO L125 PetriNetUnfolderBase]: For 2015550/2015552 co-relation queries the response was YES. [2024-06-21 16:20:47,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73222 conditions, 7491 events. 4949/7491 cut-off events. For 2015550/2015552 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42510 event pairs, 1102 based on Foata normal form. 5/7496 useless extension candidates. Maximal degree in co-relation 73028. Up to 7439 conditions per place. [2024-06-21 16:20:47,650 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 519 selfloop transitions, 30 changer transitions 0/552 dead transitions. [2024-06-21 16:20:47,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 552 transitions, 7333 flow [2024-06-21 16:20:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 16:20:47,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 16:20:47,651 INFO L175 Difference]: Start difference. First operand has 393 places, 534 transitions, 6115 flow. Second operand 8 states and 125 transitions. [2024-06-21 16:20:47,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 552 transitions, 7333 flow [2024-06-21 16:20:51,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 552 transitions, 7249 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 16:20:51,565 INFO L231 Difference]: Finished difference. Result has 394 places, 539 transitions, 6191 flow [2024-06-21 16:20:51,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6191, PETRI_PLACES=394, PETRI_TRANSITIONS=539} [2024-06-21 16:20:51,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 16:20:51,566 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 539 transitions, 6191 flow [2024-06-21 16:20:51,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:20:51,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:51,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:51,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:20:51,566 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)] === [2024-06-21 16:20:51,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash -837632374, now seen corresponding path program 11 times [2024-06-21 16:20:51,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:51,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534028073] [2024-06-21 16:20:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:51,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:52,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:52,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534028073] [2024-06-21 16:20:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534028073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:52,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:52,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:52,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375171278] [2024-06-21 16:20:52,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:52,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:52,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:52,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:20:52,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 539 transitions, 6191 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:20:52,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:52,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:20:52,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:53,916 INFO L124 PetriNetUnfolderBase]: 4946/7488 cut-off events. [2024-06-21 16:20:53,916 INFO L125 PetriNetUnfolderBase]: For 2024023/2024025 co-relation queries the response was YES. [2024-06-21 16:20:54,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73320 conditions, 7488 events. 4946/7488 cut-off events. For 2024023/2024025 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42475 event pairs, 1112 based on Foata normal form. 3/7491 useless extension candidates. Maximal degree in co-relation 73126. Up to 7429 conditions per place. [2024-06-21 16:20:54,036 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 513 selfloop transitions, 34 changer transitions 0/550 dead transitions. [2024-06-21 16:20:54,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 550 transitions, 7311 flow [2024-06-21 16:20:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 16:20:54,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 16:20:54,037 INFO L175 Difference]: Start difference. First operand has 394 places, 539 transitions, 6191 flow. Second operand 8 states and 125 transitions. [2024-06-21 16:20:54,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 550 transitions, 7311 flow [2024-06-21 16:20:57,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 550 transitions, 7190 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 16:20:57,837 INFO L231 Difference]: Finished difference. Result has 397 places, 539 transitions, 6144 flow [2024-06-21 16:20:57,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6144, PETRI_PLACES=397, PETRI_TRANSITIONS=539} [2024-06-21 16:20:57,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 16:20:57,837 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 539 transitions, 6144 flow [2024-06-21 16:20:57,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:20:57,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:57,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:20:57,837 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)] === [2024-06-21 16:20:57,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash 426813417, now seen corresponding path program 8 times [2024-06-21 16:20:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:57,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104265375] [2024-06-21 16:20:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:58,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:58,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104265375] [2024-06-21 16:20:58,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104265375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:58,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:58,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:58,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044363123] [2024-06-21 16:20:58,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:58,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:58,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:58,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:58,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:20:58,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 539 transitions, 6144 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:20:58,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:58,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:20:58,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:00,167 INFO L124 PetriNetUnfolderBase]: 4937/7475 cut-off events. [2024-06-21 16:21:00,167 INFO L125 PetriNetUnfolderBase]: For 2046756/2046758 co-relation queries the response was YES. [2024-06-21 16:21:00,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72999 conditions, 7475 events. 4937/7475 cut-off events. For 2046756/2046758 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42397 event pairs, 1102 based on Foata normal form. 5/7480 useless extension candidates. Maximal degree in co-relation 72804. Up to 7397 conditions per place. [2024-06-21 16:21:00,286 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 512 selfloop transitions, 40 changer transitions 0/555 dead transitions. [2024-06-21 16:21:00,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 555 transitions, 7546 flow [2024-06-21 16:21:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:21:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:21:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:21:00,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 16:21:00,287 INFO L175 Difference]: Start difference. First operand has 397 places, 539 transitions, 6144 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:21:00,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 555 transitions, 7546 flow [2024-06-21 16:21:04,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 555 transitions, 7418 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:21:04,474 INFO L231 Difference]: Finished difference. Result has 396 places, 539 transitions, 6103 flow [2024-06-21 16:21:04,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6103, PETRI_PLACES=396, PETRI_TRANSITIONS=539} [2024-06-21 16:21:04,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-21 16:21:04,474 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 539 transitions, 6103 flow [2024-06-21 16:21:04,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:04,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:04,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:04,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:21:04,475 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)] === [2024-06-21 16:21:04,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash 678045477, now seen corresponding path program 9 times [2024-06-21 16:21:04,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:04,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672299319] [2024-06-21 16:21:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:04,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:05,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:05,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672299319] [2024-06-21 16:21:05,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672299319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:05,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:05,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:21:05,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327421405] [2024-06-21 16:21:05,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:05,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:21:05,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:05,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:21:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:21:05,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:21:05,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 539 transitions, 6103 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:05,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:05,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:21:05,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:06,797 INFO L124 PetriNetUnfolderBase]: 4919/7451 cut-off events. [2024-06-21 16:21:06,797 INFO L125 PetriNetUnfolderBase]: For 2054471/2054473 co-relation queries the response was YES. [2024-06-21 16:21:06,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72331 conditions, 7451 events. 4919/7451 cut-off events. For 2054471/2054473 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42295 event pairs, 1095 based on Foata normal form. 8/7459 useless extension candidates. Maximal degree in co-relation 72136. Up to 7292 conditions per place. [2024-06-21 16:21:06,914 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 49 changer transitions 0/555 dead transitions. [2024-06-21 16:21:06,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 555 transitions, 7507 flow [2024-06-21 16:21:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:21:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:21:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 16:21:06,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 16:21:06,915 INFO L175 Difference]: Start difference. First operand has 396 places, 539 transitions, 6103 flow. Second operand 8 states and 130 transitions. [2024-06-21 16:21:06,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 555 transitions, 7507 flow [2024-06-21 16:21:12,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 555 transitions, 7356 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 16:21:12,027 INFO L231 Difference]: Finished difference. Result has 397 places, 539 transitions, 6060 flow [2024-06-21 16:21:12,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5952, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6060, PETRI_PLACES=397, PETRI_TRANSITIONS=539} [2024-06-21 16:21:12,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 16:21:12,028 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 539 transitions, 6060 flow [2024-06-21 16:21:12,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:12,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:12,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:12,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:21:12,028 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)] === [2024-06-21 16:21:12,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1014496767, now seen corresponding path program 10 times [2024-06-21 16:21:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:12,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108648209] [2024-06-21 16:21:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:12,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:12,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108648209] [2024-06-21 16:21:12,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108648209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:12,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:12,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:21:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653345122] [2024-06-21 16:21:12,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:21:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:21:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:21:12,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:21:12,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 539 transitions, 6060 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:12,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:12,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:21:12,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:14,362 INFO L124 PetriNetUnfolderBase]: 4949/7493 cut-off events. [2024-06-21 16:21:14,362 INFO L125 PetriNetUnfolderBase]: For 2086220/2086222 co-relation queries the response was YES. [2024-06-21 16:21:14,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72804 conditions, 7493 events. 4949/7493 cut-off events. For 2086220/2086222 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42544 event pairs, 1093 based on Foata normal form. 8/7501 useless extension candidates. Maximal degree in co-relation 72609. Up to 7155 conditions per place. [2024-06-21 16:21:14,479 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 475 selfloop transitions, 85 changer transitions 0/563 dead transitions. [2024-06-21 16:21:14,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 563 transitions, 7832 flow [2024-06-21 16:21:14,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:21:14,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:21:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 16:21:14,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:21:14,480 INFO L175 Difference]: Start difference. First operand has 397 places, 539 transitions, 6060 flow. Second operand 8 states and 136 transitions. [2024-06-21 16:21:14,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 563 transitions, 7832 flow [2024-06-21 16:21:19,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 563 transitions, 7732 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:21:19,643 INFO L231 Difference]: Finished difference. Result has 400 places, 545 transitions, 6233 flow [2024-06-21 16:21:19,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6233, PETRI_PLACES=400, PETRI_TRANSITIONS=545} [2024-06-21 16:21:19,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-21 16:21:19,643 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 545 transitions, 6233 flow [2024-06-21 16:21:19,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:19,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:19,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:19,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:21:19,644 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)] === [2024-06-21 16:21:19,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash -992123043, now seen corresponding path program 11 times [2024-06-21 16:21:19,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:19,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768368380] [2024-06-21 16:21:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:19,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:20,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:20,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768368380] [2024-06-21 16:21:20,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768368380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:20,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:20,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:21:20,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949729300] [2024-06-21 16:21:20,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:20,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:21:20,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:20,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:21:20,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:21:20,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:21:20,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 545 transitions, 6233 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:20,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:20,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:21:20,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:22,005 INFO L124 PetriNetUnfolderBase]: 4934/7472 cut-off events. [2024-06-21 16:21:22,005 INFO L125 PetriNetUnfolderBase]: For 2068494/2068496 co-relation queries the response was YES. [2024-06-21 16:21:22,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72630 conditions, 7472 events. 4934/7472 cut-off events. For 2068494/2068496 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42403 event pairs, 1097 based on Foata normal form. 5/7477 useless extension candidates. Maximal degree in co-relation 72434. Up to 7420 conditions per place. [2024-06-21 16:21:22,133 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 31 changer transitions 0/558 dead transitions. [2024-06-21 16:21:22,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 558 transitions, 7378 flow [2024-06-21 16:21:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:21:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:21:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 16:21:22,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 16:21:22,134 INFO L175 Difference]: Start difference. First operand has 400 places, 545 transitions, 6233 flow. Second operand 8 states and 124 transitions. [2024-06-21 16:21:22,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 558 transitions, 7378 flow [2024-06-21 16:21:27,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 558 transitions, 7184 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 16:21:27,687 INFO L231 Difference]: Finished difference. Result has 403 places, 545 transitions, 6108 flow [2024-06-21 16:21:27,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6039, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6108, PETRI_PLACES=403, PETRI_TRANSITIONS=545} [2024-06-21 16:21:27,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-21 16:21:27,688 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 545 transitions, 6108 flow [2024-06-21 16:21:27,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:27,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:27,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:27,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:21:27,688 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)] === [2024-06-21 16:21:27,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1014763894, now seen corresponding path program 12 times [2024-06-21 16:21:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:27,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902589870] [2024-06-21 16:21:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:28,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:28,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902589870] [2024-06-21 16:21:28,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902589870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:28,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:28,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:21:28,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028062678] [2024-06-21 16:21:28,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:28,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:21:28,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:28,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:21:28,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:21:28,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:21:28,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 545 transitions, 6108 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:28,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:28,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:21:28,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:30,040 INFO L124 PetriNetUnfolderBase]: 4928/7465 cut-off events. [2024-06-21 16:21:30,040 INFO L125 PetriNetUnfolderBase]: For 2073023/2073025 co-relation queries the response was YES. [2024-06-21 16:21:30,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72216 conditions, 7465 events. 4928/7465 cut-off events. For 2073023/2073025 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42361 event pairs, 1103 based on Foata normal form. 4/7469 useless extension candidates. Maximal degree in co-relation 72019. Up to 7353 conditions per place. [2024-06-21 16:21:30,162 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 52 changer transitions 0/558 dead transitions. [2024-06-21 16:21:30,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 558 transitions, 7523 flow [2024-06-21 16:21:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:21:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:21:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:21:30,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 16:21:30,163 INFO L175 Difference]: Start difference. First operand has 403 places, 545 transitions, 6108 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:21:30,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 558 transitions, 7523 flow [2024-06-21 16:21:34,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 558 transitions, 7355 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 16:21:34,747 INFO L231 Difference]: Finished difference. Result has 402 places, 546 transitions, 6098 flow [2024-06-21 16:21:34,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5940, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6098, PETRI_PLACES=402, PETRI_TRANSITIONS=546} [2024-06-21 16:21:34,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-21 16:21:34,747 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 546 transitions, 6098 flow [2024-06-21 16:21:34,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:34,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:34,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:34,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:21:34,748 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)] === [2024-06-21 16:21:34,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1014763677, now seen corresponding path program 12 times [2024-06-21 16:21:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:34,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446613086] [2024-06-21 16:21:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:34,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:35,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:35,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446613086] [2024-06-21 16:21:35,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446613086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:35,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:35,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:21:35,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216558725] [2024-06-21 16:21:35,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:35,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:21:35,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:35,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:21:35,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:21:35,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:21:35,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 546 transitions, 6098 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:35,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:35,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:21:35,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:37,169 INFO L124 PetriNetUnfolderBase]: 4904/7431 cut-off events. [2024-06-21 16:21:37,170 INFO L125 PetriNetUnfolderBase]: For 2086569/2086571 co-relation queries the response was YES. [2024-06-21 16:21:37,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71500 conditions, 7431 events. 4904/7431 cut-off events. For 2086569/2086571 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42177 event pairs, 1075 based on Foata normal form. 8/7439 useless extension candidates. Maximal degree in co-relation 71301. Up to 7118 conditions per place. [2024-06-21 16:21:37,290 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 88 changer transitions 0/562 dead transitions. [2024-06-21 16:21:37,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 562 transitions, 7262 flow [2024-06-21 16:21:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:21:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:21:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:21:37,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 16:21:37,291 INFO L175 Difference]: Start difference. First operand has 402 places, 546 transitions, 6098 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:21:37,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 562 transitions, 7262 flow [2024-06-21 16:21:42,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 562 transitions, 7070 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:42,015 INFO L231 Difference]: Finished difference. Result has 402 places, 546 transitions, 6095 flow [2024-06-21 16:21:42,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5910, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6095, PETRI_PLACES=402, PETRI_TRANSITIONS=546} [2024-06-21 16:21:42,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-21 16:21:42,016 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 546 transitions, 6095 flow [2024-06-21 16:21:42,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:21:42,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:42,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:42,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:21:42,016 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)] === [2024-06-21 16:21:42,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1020402207, now seen corresponding path program 5 times [2024-06-21 16:21:42,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:42,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076095244] [2024-06-21 16:21:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:42,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:42,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:42,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076095244] [2024-06-21 16:21:42,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076095244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:42,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:42,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:42,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298515602] [2024-06-21 16:21:42,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:42,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:42,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:42,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:42,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:42,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:21:42,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 546 transitions, 6095 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:42,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:42,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:21:42,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:44,777 INFO L124 PetriNetUnfolderBase]: 4934/7473 cut-off events. [2024-06-21 16:21:44,777 INFO L125 PetriNetUnfolderBase]: For 2118218/2118220 co-relation queries the response was YES. [2024-06-21 16:21:44,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72105 conditions, 7473 events. 4934/7473 cut-off events. For 2118218/2118220 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 42440 event pairs, 1087 based on Foata normal form. 8/7481 useless extension candidates. Maximal degree in co-relation 71906. Up to 7302 conditions per place. [2024-06-21 16:21:44,906 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 508 selfloop transitions, 57 changer transitions 0/568 dead transitions. [2024-06-21 16:21:44,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 568 transitions, 7364 flow [2024-06-21 16:21:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 16:21:44,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 16:21:44,907 INFO L175 Difference]: Start difference. First operand has 402 places, 546 transitions, 6095 flow. Second operand 9 states and 144 transitions. [2024-06-21 16:21:44,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 568 transitions, 7364 flow [2024-06-21 16:21:50,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 568 transitions, 7008 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 16:21:50,486 INFO L231 Difference]: Finished difference. Result has 401 places, 551 transitions, 5967 flow [2024-06-21 16:21:50,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5739, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5967, PETRI_PLACES=401, PETRI_TRANSITIONS=551} [2024-06-21 16:21:50,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-21 16:21:50,487 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 551 transitions, 5967 flow [2024-06-21 16:21:50,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:50,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:50,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:50,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:21:50,487 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)] === [2024-06-21 16:21:50,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:50,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1014875525, now seen corresponding path program 6 times [2024-06-21 16:21:50,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:50,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594132857] [2024-06-21 16:21:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:50,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:51,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:51,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594132857] [2024-06-21 16:21:51,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594132857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:51,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:51,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:51,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477276931] [2024-06-21 16:21:51,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:51,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:51,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:51,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:51,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:21:51,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 551 transitions, 5967 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:51,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:51,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:21:51,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:53,298 INFO L124 PetriNetUnfolderBase]: 4944/7487 cut-off events. [2024-06-21 16:21:53,298 INFO L125 PetriNetUnfolderBase]: For 2113679/2113681 co-relation queries the response was YES. [2024-06-21 16:21:53,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72312 conditions, 7487 events. 4944/7487 cut-off events. For 2113679/2113681 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 42529 event pairs, 1071 based on Foata normal form. 4/7491 useless extension candidates. Maximal degree in co-relation 72112. Up to 7342 conditions per place. [2024-06-21 16:21:53,420 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 72 changer transitions 0/584 dead transitions. [2024-06-21 16:21:53,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 584 transitions, 7380 flow [2024-06-21 16:21:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:53,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 16:21:53,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 16:21:53,421 INFO L175 Difference]: Start difference. First operand has 401 places, 551 transitions, 5967 flow. Second operand 9 states and 141 transitions. [2024-06-21 16:21:53,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 584 transitions, 7380 flow [2024-06-21 16:21:59,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 584 transitions, 7191 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 16:21:59,070 INFO L231 Difference]: Finished difference. Result has 406 places, 570 transitions, 6243 flow [2024-06-21 16:21:59,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5790, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6243, PETRI_PLACES=406, PETRI_TRANSITIONS=570} [2024-06-21 16:21:59,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 16:21:59,071 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 570 transitions, 6243 flow [2024-06-21 16:21:59,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:59,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:59,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:59,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:21:59,071 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)] === [2024-06-21 16:21:59,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash -103871669, now seen corresponding path program 7 times [2024-06-21 16:21:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:59,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937194688] [2024-06-21 16:21:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:59,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:00,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:00,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937194688] [2024-06-21 16:22:00,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937194688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:00,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:00,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:00,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627288696] [2024-06-21 16:22:00,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:00,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:00,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:00,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:00,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:22:00,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 570 transitions, 6243 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:00,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:00,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:22:00,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:01,959 INFO L124 PetriNetUnfolderBase]: 4954/7501 cut-off events. [2024-06-21 16:22:01,959 INFO L125 PetriNetUnfolderBase]: For 2144692/2144694 co-relation queries the response was YES. [2024-06-21 16:22:02,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72734 conditions, 7501 events. 4954/7501 cut-off events. For 2144692/2144694 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 42656 event pairs, 1071 based on Foata normal form. 4/7505 useless extension candidates. Maximal degree in co-relation 72530. Up to 7356 conditions per place. [2024-06-21 16:22:02,086 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 521 selfloop transitions, 66 changer transitions 0/590 dead transitions. [2024-06-21 16:22:02,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 590 transitions, 7577 flow [2024-06-21 16:22:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 16:22:02,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 16:22:02,087 INFO L175 Difference]: Start difference. First operand has 406 places, 570 transitions, 6243 flow. Second operand 9 states and 141 transitions. [2024-06-21 16:22:02,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 590 transitions, 7577 flow [2024-06-21 16:22:08,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 590 transitions, 7387 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 16:22:08,014 INFO L231 Difference]: Finished difference. Result has 410 places, 576 transitions, 6318 flow [2024-06-21 16:22:08,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6057, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6318, PETRI_PLACES=410, PETRI_TRANSITIONS=576} [2024-06-21 16:22:08,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-21 16:22:08,014 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 576 transitions, 6318 flow [2024-06-21 16:22:08,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:08,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:08,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:08,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:22:08,015 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)] === [2024-06-21 16:22:08,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:08,015 INFO L85 PathProgramCache]: Analyzing trace with hash 692787062, now seen corresponding path program 1 times [2024-06-21 16:22:08,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:08,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704517104] [2024-06-21 16:22:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:08,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:08,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:08,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704517104] [2024-06-21 16:22:08,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704517104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:08,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:08,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:08,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124416180] [2024-06-21 16:22:08,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:08,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:08,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:22:08,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 576 transitions, 6318 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:08,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:08,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:22:08,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:10,715 INFO L124 PetriNetUnfolderBase]: 4962/7513 cut-off events. [2024-06-21 16:22:10,715 INFO L125 PetriNetUnfolderBase]: For 2173961/2173963 co-relation queries the response was YES. [2024-06-21 16:22:10,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72792 conditions, 7513 events. 4962/7513 cut-off events. For 2173961/2173963 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 42661 event pairs, 1064 based on Foata normal form. 6/7519 useless extension candidates. Maximal degree in co-relation 72587. Up to 7381 conditions per place. [2024-06-21 16:22:10,846 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 550 selfloop transitions, 47 changer transitions 0/600 dead transitions. [2024-06-21 16:22:10,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 600 transitions, 8020 flow [2024-06-21 16:22:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 16:22:10,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 16:22:10,847 INFO L175 Difference]: Start difference. First operand has 410 places, 576 transitions, 6318 flow. Second operand 9 states and 142 transitions. [2024-06-21 16:22:10,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 600 transitions, 8020 flow [2024-06-21 16:22:16,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 600 transitions, 7868 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:16,432 INFO L231 Difference]: Finished difference. Result has 416 places, 584 transitions, 6491 flow [2024-06-21 16:22:16,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6166, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6491, PETRI_PLACES=416, PETRI_TRANSITIONS=584} [2024-06-21 16:22:16,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-21 16:22:16,433 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 584 transitions, 6491 flow [2024-06-21 16:22:16,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:16,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:16,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:16,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:22:16,433 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)] === [2024-06-21 16:22:16,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash 249558548, now seen corresponding path program 5 times [2024-06-21 16:22:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:16,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847124703] [2024-06-21 16:22:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:17,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:17,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847124703] [2024-06-21 16:22:17,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847124703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:17,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:17,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:17,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174321415] [2024-06-21 16:22:17,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:17,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:17,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:17,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:17,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:22:17,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 584 transitions, 6491 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:17,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:17,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:22:17,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:19,489 INFO L124 PetriNetUnfolderBase]: 4952/7499 cut-off events. [2024-06-21 16:22:19,490 INFO L125 PetriNetUnfolderBase]: For 2175321/2175323 co-relation queries the response was YES. [2024-06-21 16:22:19,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72785 conditions, 7499 events. 4952/7499 cut-off events. For 2175321/2175323 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42545 event pairs, 1077 based on Foata normal form. 6/7505 useless extension candidates. Maximal degree in co-relation 72578. Up to 7425 conditions per place. [2024-06-21 16:22:19,603 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 556 selfloop transitions, 38 changer transitions 0/597 dead transitions. [2024-06-21 16:22:19,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 597 transitions, 7709 flow [2024-06-21 16:22:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 16:22:19,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 16:22:19,604 INFO L175 Difference]: Start difference. First operand has 416 places, 584 transitions, 6491 flow. Second operand 9 states and 138 transitions. [2024-06-21 16:22:19,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 597 transitions, 7709 flow [2024-06-21 16:22:24,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 597 transitions, 7489 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:24,937 INFO L231 Difference]: Finished difference. Result has 421 places, 584 transitions, 6353 flow [2024-06-21 16:22:24,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6271, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6353, PETRI_PLACES=421, PETRI_TRANSITIONS=584} [2024-06-21 16:22:24,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-21 16:22:24,937 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 584 transitions, 6353 flow [2024-06-21 16:22:24,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:24,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:24,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:24,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:22:24,937 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)] === [2024-06-21 16:22:24,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:24,938 INFO L85 PathProgramCache]: Analyzing trace with hash 249558889, now seen corresponding path program 8 times [2024-06-21 16:22:24,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:24,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970771647] [2024-06-21 16:22:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:24,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:25,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:25,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970771647] [2024-06-21 16:22:25,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970771647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:25,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:25,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:25,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908296492] [2024-06-21 16:22:25,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:25,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:25,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:25,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:25,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:25,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:22:25,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 584 transitions, 6353 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:25,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:25,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:22:25,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:27,678 INFO L124 PetriNetUnfolderBase]: 4946/7491 cut-off events. [2024-06-21 16:22:27,678 INFO L125 PetriNetUnfolderBase]: For 2168169/2168171 co-relation queries the response was YES. [2024-06-21 16:22:27,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72167 conditions, 7491 events. 4946/7491 cut-off events. For 2168169/2168171 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42555 event pairs, 1067 based on Foata normal form. 4/7495 useless extension candidates. Maximal degree in co-relation 71958. Up to 7322 conditions per place. [2024-06-21 16:22:27,798 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 512 selfloop transitions, 89 changer transitions 0/604 dead transitions. [2024-06-21 16:22:27,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 604 transitions, 7711 flow [2024-06-21 16:22:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 16:22:27,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 16:22:27,798 INFO L175 Difference]: Start difference. First operand has 421 places, 584 transitions, 6353 flow. Second operand 9 states and 142 transitions. [2024-06-21 16:22:27,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 604 transitions, 7711 flow [2024-06-21 16:22:34,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 604 transitions, 7573 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 16:22:34,120 INFO L231 Difference]: Finished difference. Result has 422 places, 590 transitions, 6546 flow [2024-06-21 16:22:34,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6215, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6546, PETRI_PLACES=422, PETRI_TRANSITIONS=590} [2024-06-21 16:22:34,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 16:22:34,121 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 590 transitions, 6546 flow [2024-06-21 16:22:34,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:34,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:34,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:34,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:22:34,121 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)] === [2024-06-21 16:22:34,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2026699107, now seen corresponding path program 1 times [2024-06-21 16:22:34,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:34,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855794524] [2024-06-21 16:22:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:34,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:34,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:34,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855794524] [2024-06-21 16:22:34,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855794524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:34,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:34,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:34,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095903749] [2024-06-21 16:22:34,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:34,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:34,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:34,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:34,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:22:34,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 590 transitions, 6546 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:34,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:34,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:22:34,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:36,972 INFO L124 PetriNetUnfolderBase]: 4976/7532 cut-off events. [2024-06-21 16:22:36,973 INFO L125 PetriNetUnfolderBase]: For 2237899/2237899 co-relation queries the response was YES. [2024-06-21 16:22:37,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72694 conditions, 7532 events. 4976/7532 cut-off events. For 2237899/2237899 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 42797 event pairs, 1082 based on Foata normal form. 6/7538 useless extension candidates. Maximal degree in co-relation 72484. Up to 7452 conditions per place. [2024-06-21 16:22:37,107 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 593 selfloop transitions, 22 changer transitions 0/618 dead transitions. [2024-06-21 16:22:37,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 618 transitions, 7902 flow [2024-06-21 16:22:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 16:22:37,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 16:22:37,108 INFO L175 Difference]: Start difference. First operand has 422 places, 590 transitions, 6546 flow. Second operand 9 states and 145 transitions. [2024-06-21 16:22:37,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 618 transitions, 7902 flow [2024-06-21 16:22:43,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 618 transitions, 7659 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:43,258 INFO L231 Difference]: Finished difference. Result has 425 places, 593 transitions, 6415 flow [2024-06-21 16:22:43,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6415, PETRI_PLACES=425, PETRI_TRANSITIONS=593} [2024-06-21 16:22:43,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-21 16:22:43,258 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 593 transitions, 6415 flow [2024-06-21 16:22:43,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:43,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:43,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:43,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:22:43,259 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)] === [2024-06-21 16:22:43,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1266533823, now seen corresponding path program 2 times [2024-06-21 16:22:43,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:43,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224526388] [2024-06-21 16:22:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:43,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:43,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:43,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224526388] [2024-06-21 16:22:43,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224526388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:43,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:43,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:43,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820899826] [2024-06-21 16:22:43,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:43,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:43,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:44,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:22:44,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 593 transitions, 6415 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:44,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:44,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:22:44,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:46,227 INFO L124 PetriNetUnfolderBase]: 5054/7640 cut-off events. [2024-06-21 16:22:46,227 INFO L125 PetriNetUnfolderBase]: For 2327246/2327246 co-relation queries the response was YES. [2024-06-21 16:22:46,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74732 conditions, 7640 events. 5054/7640 cut-off events. For 2327246/2327246 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43414 event pairs, 1077 based on Foata normal form. 6/7646 useless extension candidates. Maximal degree in co-relation 74521. Up to 7284 conditions per place. [2024-06-21 16:22:46,366 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 553 selfloop transitions, 78 changer transitions 0/634 dead transitions. [2024-06-21 16:22:46,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 634 transitions, 8517 flow [2024-06-21 16:22:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:22:46,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:22:46,367 INFO L175 Difference]: Start difference. First operand has 425 places, 593 transitions, 6415 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:22:46,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 634 transitions, 8517 flow [2024-06-21 16:22:52,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 634 transitions, 8427 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:52,411 INFO L231 Difference]: Finished difference. Result has 427 places, 602 transitions, 6679 flow [2024-06-21 16:22:52,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6325, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6679, PETRI_PLACES=427, PETRI_TRANSITIONS=602} [2024-06-21 16:22:52,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-21 16:22:52,412 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 602 transitions, 6679 flow [2024-06-21 16:22:52,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:52,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:52,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:52,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:22:52,412 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)] === [2024-06-21 16:22:52,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2006736895, now seen corresponding path program 3 times [2024-06-21 16:22:52,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:52,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356990593] [2024-06-21 16:22:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:52,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:53,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:53,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356990593] [2024-06-21 16:22:53,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356990593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:53,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:53,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:53,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939085627] [2024-06-21 16:22:53,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:53,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:53,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:53,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:53,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:22:53,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 602 transitions, 6679 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:53,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:53,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:22:53,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:55,300 INFO L124 PetriNetUnfolderBase]: 5036/7616 cut-off events. [2024-06-21 16:22:55,300 INFO L125 PetriNetUnfolderBase]: For 2303858/2303858 co-relation queries the response was YES. [2024-06-21 16:22:55,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74347 conditions, 7616 events. 5036/7616 cut-off events. For 2303858/2303858 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 43254 event pairs, 1071 based on Foata normal form. 6/7622 useless extension candidates. Maximal degree in co-relation 74135. Up to 7273 conditions per place. [2024-06-21 16:22:55,434 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 77 changer transitions 0/635 dead transitions. [2024-06-21 16:22:55,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 635 transitions, 8329 flow [2024-06-21 16:22:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:22:55,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 16:22:55,435 INFO L175 Difference]: Start difference. First operand has 427 places, 602 transitions, 6679 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:22:55,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 635 transitions, 8329 flow [2024-06-21 16:23:01,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 635 transitions, 8165 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 16:23:01,806 INFO L231 Difference]: Finished difference. Result has 432 places, 602 transitions, 6675 flow [2024-06-21 16:23:01,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6515, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6675, PETRI_PLACES=432, PETRI_TRANSITIONS=602} [2024-06-21 16:23:01,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-21 16:23:01,806 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 602 transitions, 6675 flow [2024-06-21 16:23:01,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:01,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:01,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:01,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:23:01,806 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)] === [2024-06-21 16:23:01,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:01,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1862846365, now seen corresponding path program 4 times [2024-06-21 16:23:01,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:01,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284571224] [2024-06-21 16:23:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:01,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:02,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:02,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284571224] [2024-06-21 16:23:02,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284571224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:02,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:02,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:02,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617718228] [2024-06-21 16:23:02,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:02,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:02,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:02,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:02,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:02,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:23:02,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 602 transitions, 6675 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:02,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:02,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:23:02,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:04,763 INFO L124 PetriNetUnfolderBase]: 5114/7724 cut-off events. [2024-06-21 16:23:04,763 INFO L125 PetriNetUnfolderBase]: For 2395699/2395699 co-relation queries the response was YES. [2024-06-21 16:23:04,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76075 conditions, 7724 events. 5114/7724 cut-off events. For 2395699/2395699 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 43912 event pairs, 1090 based on Foata normal form. 6/7730 useless extension candidates. Maximal degree in co-relation 75861. Up to 7328 conditions per place. [2024-06-21 16:23:04,905 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 558 selfloop transitions, 79 changer transitions 0/640 dead transitions. [2024-06-21 16:23:04,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 640 transitions, 8741 flow [2024-06-21 16:23:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:23:04,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 16:23:04,906 INFO L175 Difference]: Start difference. First operand has 432 places, 602 transitions, 6675 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:23:04,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 640 transitions, 8741 flow [2024-06-21 16:23:11,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 640 transitions, 8598 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:11,623 INFO L231 Difference]: Finished difference. Result has 434 places, 608 transitions, 6816 flow [2024-06-21 16:23:11,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6816, PETRI_PLACES=434, PETRI_TRANSITIONS=608} [2024-06-21 16:23:11,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 16:23:11,624 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 608 transitions, 6816 flow [2024-06-21 16:23:11,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:11,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:11,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:11,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:23:11,624 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)] === [2024-06-21 16:23:11,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1862638975, now seen corresponding path program 5 times [2024-06-21 16:23:11,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:11,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205059436] [2024-06-21 16:23:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:11,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:12,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:12,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205059436] [2024-06-21 16:23:12,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205059436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:12,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:12,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:12,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918428019] [2024-06-21 16:23:12,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:12,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:12,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:12,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:23:12,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 608 transitions, 6816 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:12,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:12,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:23:12,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:14,633 INFO L124 PetriNetUnfolderBase]: 5144/7766 cut-off events. [2024-06-21 16:23:14,633 INFO L125 PetriNetUnfolderBase]: For 2431257/2431257 co-relation queries the response was YES. [2024-06-21 16:23:14,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76630 conditions, 7766 events. 5144/7766 cut-off events. For 2431257/2431257 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 44177 event pairs, 1092 based on Foata normal form. 6/7772 useless extension candidates. Maximal degree in co-relation 76415. Up to 7350 conditions per place. [2024-06-21 16:23:14,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 84 changer transitions 0/641 dead transitions. [2024-06-21 16:23:14,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 641 transitions, 8821 flow [2024-06-21 16:23:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:23:14,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 16:23:14,813 INFO L175 Difference]: Start difference. First operand has 434 places, 608 transitions, 6816 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:23:14,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 641 transitions, 8821 flow [2024-06-21 16:23:21,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 641 transitions, 8643 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:23:21,265 INFO L231 Difference]: Finished difference. Result has 438 places, 611 transitions, 6875 flow [2024-06-21 16:23:21,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6651, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6875, PETRI_PLACES=438, PETRI_TRANSITIONS=611} [2024-06-21 16:23:21,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-21 16:23:21,266 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 611 transitions, 6875 flow [2024-06-21 16:23:21,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:21,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:21,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:21,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:23:21,267 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)] === [2024-06-21 16:23:21,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:21,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1122643293, now seen corresponding path program 6 times [2024-06-21 16:23:21,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:21,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137526829] [2024-06-21 16:23:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:21,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:22,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:22,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137526829] [2024-06-21 16:23:22,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137526829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:22,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:22,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:22,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842622217] [2024-06-21 16:23:22,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:22,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:22,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:22,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:23:22,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 611 transitions, 6875 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:22,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:22,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:23:22,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:24,401 INFO L124 PetriNetUnfolderBase]: 5126/7742 cut-off events. [2024-06-21 16:23:24,402 INFO L125 PetriNetUnfolderBase]: For 2402402/2402402 co-relation queries the response was YES. [2024-06-21 16:23:24,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75625 conditions, 7742 events. 5126/7742 cut-off events. For 2402402/2402402 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44012 event pairs, 1091 based on Foata normal form. 6/7748 useless extension candidates. Maximal degree in co-relation 75409. Up to 7339 conditions per place. [2024-06-21 16:23:24,551 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 81 changer transitions 0/643 dead transitions. [2024-06-21 16:23:24,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 643 transitions, 8551 flow [2024-06-21 16:23:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:23:24,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 16:23:24,552 INFO L175 Difference]: Start difference. First operand has 438 places, 611 transitions, 6875 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:23:24,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 643 transitions, 8551 flow [2024-06-21 16:23:31,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 643 transitions, 8353 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:31,422 INFO L231 Difference]: Finished difference. Result has 441 places, 611 transitions, 6845 flow [2024-06-21 16:23:31,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6677, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6845, PETRI_PLACES=441, PETRI_TRANSITIONS=611} [2024-06-21 16:23:31,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-21 16:23:31,423 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 611 transitions, 6845 flow [2024-06-21 16:23:31,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:31,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:31,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:31,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:23:31,423 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)] === [2024-06-21 16:23:31,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash 353530719, now seen corresponding path program 7 times [2024-06-21 16:23:31,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:31,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717400791] [2024-06-21 16:23:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:32,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:32,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717400791] [2024-06-21 16:23:32,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717400791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:32,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:32,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502079363] [2024-06-21 16:23:32,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:32,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:32,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:32,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:32,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:23:32,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 611 transitions, 6845 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:32,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:32,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:23:32,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:34,417 INFO L124 PetriNetUnfolderBase]: 5204/7852 cut-off events. [2024-06-21 16:23:34,417 INFO L125 PetriNetUnfolderBase]: For 2499492/2499494 co-relation queries the response was YES. [2024-06-21 16:23:34,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77295 conditions, 7852 events. 5204/7852 cut-off events. For 2499492/2499494 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44685 event pairs, 1121 based on Foata normal form. 6/7858 useless extension candidates. Maximal degree in co-relation 77078. Up to 7394 conditions per place. [2024-06-21 16:23:34,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 87 changer transitions 0/645 dead transitions. [2024-06-21 16:23:34,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 645 transitions, 8935 flow [2024-06-21 16:23:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:23:34,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 16:23:34,571 INFO L175 Difference]: Start difference. First operand has 441 places, 611 transitions, 6845 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:23:34,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 645 transitions, 8935 flow [2024-06-21 16:23:41,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 645 transitions, 8723 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:41,890 INFO L231 Difference]: Finished difference. Result has 441 places, 617 transitions, 6945 flow [2024-06-21 16:23:41,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6645, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6945, PETRI_PLACES=441, PETRI_TRANSITIONS=617} [2024-06-21 16:23:41,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-21 16:23:41,890 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 617 transitions, 6945 flow [2024-06-21 16:23:41,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:41,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:41,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:41,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:23:41,891 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)] === [2024-06-21 16:23:41,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:41,891 INFO L85 PathProgramCache]: Analyzing trace with hash 427059433, now seen corresponding path program 8 times [2024-06-21 16:23:41,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:41,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61195206] [2024-06-21 16:23:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:41,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:42,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:42,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61195206] [2024-06-21 16:23:42,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61195206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:42,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:42,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:42,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233965965] [2024-06-21 16:23:42,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:42,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:42,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:42,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:42,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:42,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:23:42,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 617 transitions, 6945 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:42,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:42,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:23:42,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:45,169 INFO L124 PetriNetUnfolderBase]: 5234/7894 cut-off events. [2024-06-21 16:23:45,169 INFO L125 PetriNetUnfolderBase]: For 2534561/2534563 co-relation queries the response was YES. [2024-06-21 16:23:45,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77849 conditions, 7894 events. 5234/7894 cut-off events. For 2534561/2534563 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44938 event pairs, 1108 based on Foata normal form. 6/7900 useless extension candidates. Maximal degree in co-relation 77631. Up to 7416 conditions per place. [2024-06-21 16:23:45,304 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 94 changer transitions 0/645 dead transitions. [2024-06-21 16:23:45,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 645 transitions, 8669 flow [2024-06-21 16:23:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 16:23:45,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 16:23:45,305 INFO L175 Difference]: Start difference. First operand has 441 places, 617 transitions, 6945 flow. Second operand 9 states and 156 transitions. [2024-06-21 16:23:45,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 645 transitions, 8669 flow [2024-06-21 16:23:52,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 645 transitions, 8420 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:52,335 INFO L231 Difference]: Finished difference. Result has 444 places, 620 transitions, 6956 flow [2024-06-21 16:23:52,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6712, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6956, PETRI_PLACES=444, PETRI_TRANSITIONS=620} [2024-06-21 16:23:52,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-21 16:23:52,336 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 620 transitions, 6956 flow [2024-06-21 16:23:52,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:52,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:52,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:52,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:23:52,336 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)] === [2024-06-21 16:23:52,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash 683767333, now seen corresponding path program 9 times [2024-06-21 16:23:52,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:52,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528885396] [2024-06-21 16:23:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:53,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:53,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528885396] [2024-06-21 16:23:53,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528885396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:53,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:53,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:53,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744156675] [2024-06-21 16:23:53,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:53,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:53,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:53,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:53,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:23:53,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 620 transitions, 6956 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:53,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:53,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:23:53,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:55,409 INFO L124 PetriNetUnfolderBase]: 5216/7870 cut-off events. [2024-06-21 16:23:55,409 INFO L125 PetriNetUnfolderBase]: For 2501374/2501376 co-relation queries the response was YES. [2024-06-21 16:23:55,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76781 conditions, 7870 events. 5216/7870 cut-off events. For 2501374/2501376 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 44777 event pairs, 1111 based on Foata normal form. 6/7876 useless extension candidates. Maximal degree in co-relation 76562. Up to 7405 conditions per place. [2024-06-21 16:23:55,553 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 544 selfloop transitions, 96 changer transitions 0/643 dead transitions. [2024-06-21 16:23:55,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 643 transitions, 8602 flow [2024-06-21 16:23:55,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 16:23:55,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:23:55,554 INFO L175 Difference]: Start difference. First operand has 444 places, 620 transitions, 6956 flow. Second operand 9 states and 153 transitions. [2024-06-21 16:23:55,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 643 transitions, 8602 flow [2024-06-21 16:24:02,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 643 transitions, 8258 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 16:24:02,400 INFO L231 Difference]: Finished difference. Result has 445 places, 620 transitions, 6810 flow [2024-06-21 16:24:02,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6612, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6810, PETRI_PLACES=445, PETRI_TRANSITIONS=620} [2024-06-21 16:24:02,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-21 16:24:02,401 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 620 transitions, 6810 flow [2024-06-21 16:24:02,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:02,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:02,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:02,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:24:02,401 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)] === [2024-06-21 16:24:02,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:02,401 INFO L85 PathProgramCache]: Analyzing trace with hash 427065013, now seen corresponding path program 10 times [2024-06-21 16:24:02,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:02,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947996562] [2024-06-21 16:24:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:02,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:03,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947996562] [2024-06-21 16:24:03,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947996562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:03,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:03,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:24:03,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014384683] [2024-06-21 16:24:03,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:03,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:24:03,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:24:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:24:03,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:24:03,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 620 transitions, 6810 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:03,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:03,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:24:03,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:05,316 INFO L124 PetriNetUnfolderBase]: 5198/7846 cut-off events. [2024-06-21 16:24:05,316 INFO L125 PetriNetUnfolderBase]: For 2466266/2466268 co-relation queries the response was YES. [2024-06-21 16:24:05,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75654 conditions, 7846 events. 5198/7846 cut-off events. For 2466266/2466268 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44689 event pairs, 1118 based on Foata normal form. 6/7852 useless extension candidates. Maximal degree in co-relation 75434. Up to 7394 conditions per place. [2024-06-21 16:24:05,459 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 550 selfloop transitions, 92 changer transitions 0/645 dead transitions. [2024-06-21 16:24:05,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 645 transitions, 8180 flow [2024-06-21 16:24:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:24:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:24:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 16:24:05,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 16:24:05,460 INFO L175 Difference]: Start difference. First operand has 445 places, 620 transitions, 6810 flow. Second operand 9 states and 157 transitions. [2024-06-21 16:24:05,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 645 transitions, 8180 flow [2024-06-21 16:24:12,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 645 transitions, 7942 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 16:24:12,646 INFO L231 Difference]: Finished difference. Result has 446 places, 620 transitions, 6762 flow [2024-06-21 16:24:12,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6572, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6762, PETRI_PLACES=446, PETRI_TRANSITIONS=620} [2024-06-21 16:24:12,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 16:24:12,647 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 620 transitions, 6762 flow [2024-06-21 16:24:12,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:12,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:12,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:12,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:24:12,647 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)] === [2024-06-21 16:24:12,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:12,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1362852425, now seen corresponding path program 1 times [2024-06-21 16:24:12,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:12,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891485806] [2024-06-21 16:24:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:12,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:13,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:13,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891485806] [2024-06-21 16:24:13,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891485806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:13,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:13,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:13,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039902212] [2024-06-21 16:24:13,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:13,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:13,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:13,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:13,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:13,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:24:13,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 620 transitions, 6762 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:13,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:13,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:24:13,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:15,680 INFO L124 PetriNetUnfolderBase]: 5203/7852 cut-off events. [2024-06-21 16:24:15,680 INFO L125 PetriNetUnfolderBase]: For 2443484/2443486 co-relation queries the response was YES. [2024-06-21 16:24:15,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75806 conditions, 7852 events. 5203/7852 cut-off events. For 2443484/2443486 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 44748 event pairs, 1133 based on Foata normal form. 3/7855 useless extension candidates. Maximal degree in co-relation 75585. Up to 7602 conditions per place. [2024-06-21 16:24:15,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 568 selfloop transitions, 87 changer transitions 0/658 dead transitions. [2024-06-21 16:24:15,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 658 transitions, 8572 flow [2024-06-21 16:24:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 16:24:15,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-21 16:24:15,819 INFO L175 Difference]: Start difference. First operand has 446 places, 620 transitions, 6762 flow. Second operand 10 states and 173 transitions. [2024-06-21 16:24:15,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 658 transitions, 8572 flow [2024-06-21 16:24:23,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 658 transitions, 8360 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:24:23,069 INFO L231 Difference]: Finished difference. Result has 447 places, 626 transitions, 6862 flow [2024-06-21 16:24:23,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6550, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6862, PETRI_PLACES=447, PETRI_TRANSITIONS=626} [2024-06-21 16:24:23,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-21 16:24:23,069 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 626 transitions, 6862 flow [2024-06-21 16:24:23,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:23,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:23,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:23,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:24:23,070 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)] === [2024-06-21 16:24:23,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:23,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1286401775, now seen corresponding path program 2 times [2024-06-21 16:24:23,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:23,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998834070] [2024-06-21 16:24:23,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:23,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:23,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:23,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998834070] [2024-06-21 16:24:23,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998834070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:23,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:23,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390291069] [2024-06-21 16:24:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:23,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:23,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:23,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:24:23,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 626 transitions, 6862 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:23,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:23,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:24:23,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:25,947 INFO L124 PetriNetUnfolderBase]: 5208/7859 cut-off events. [2024-06-21 16:24:25,947 INFO L125 PetriNetUnfolderBase]: For 2478125/2478127 co-relation queries the response was YES. [2024-06-21 16:24:26,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76382 conditions, 7859 events. 5208/7859 cut-off events. For 2478125/2478127 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 44777 event pairs, 1133 based on Foata normal form. 3/7862 useless extension candidates. Maximal degree in co-relation 76160. Up to 7608 conditions per place. [2024-06-21 16:24:26,098 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 567 selfloop transitions, 85 changer transitions 0/655 dead transitions. [2024-06-21 16:24:26,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 655 transitions, 8596 flow [2024-06-21 16:24:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 16:24:26,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 16:24:26,099 INFO L175 Difference]: Start difference. First operand has 447 places, 626 transitions, 6862 flow. Second operand 10 states and 167 transitions. [2024-06-21 16:24:26,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 655 transitions, 8596 flow [2024-06-21 16:24:34,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 655 transitions, 8367 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:34,280 INFO L231 Difference]: Finished difference. Result has 451 places, 629 transitions, 6880 flow [2024-06-21 16:24:34,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6671, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6880, PETRI_PLACES=451, PETRI_TRANSITIONS=629} [2024-06-21 16:24:34,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-21 16:24:34,281 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 629 transitions, 6880 flow [2024-06-21 16:24:34,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:34,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:34,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:34,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:24:34,281 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)] === [2024-06-21 16:24:34,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash -376612645, now seen corresponding path program 1 times [2024-06-21 16:24:34,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:34,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903741946] [2024-06-21 16:24:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:34,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:35,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:35,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903741946] [2024-06-21 16:24:35,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903741946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:35,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:35,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:35,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077278511] [2024-06-21 16:24:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:35,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:35,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:35,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:24:35,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 629 transitions, 6880 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 16:24:35,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:35,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:24:35,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:37,880 INFO L124 PetriNetUnfolderBase]: 5381/8118 cut-off events. [2024-06-21 16:24:37,880 INFO L125 PetriNetUnfolderBase]: For 2842697/2842699 co-relation queries the response was YES. [2024-06-21 16:24:37,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82779 conditions, 8118 events. 5381/8118 cut-off events. For 2842697/2842699 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 46285 event pairs, 961 based on Foata normal form. 6/8124 useless extension candidates. Maximal degree in co-relation 82555. Up to 6928 conditions per place. [2024-06-21 16:24:38,009 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 426 selfloop transitions, 254 changer transitions 0/683 dead transitions. [2024-06-21 16:24:38,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 683 transitions, 9162 flow [2024-06-21 16:24:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 16:24:38,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:24:38,010 INFO L175 Difference]: Start difference. First operand has 451 places, 629 transitions, 6880 flow. Second operand 10 states and 195 transitions. [2024-06-21 16:24:38,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 683 transitions, 9162 flow [2024-06-21 16:24:43,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 683 transitions, 9000 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 16:24:43,907 INFO L231 Difference]: Finished difference. Result has 454 places, 635 transitions, 7386 flow [2024-06-21 16:24:43,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6718, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7386, PETRI_PLACES=454, PETRI_TRANSITIONS=635} [2024-06-21 16:24:43,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-21 16:24:43,908 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 635 transitions, 7386 flow [2024-06-21 16:24:43,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 16:24:43,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:43,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:43,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:24:43,909 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)] === [2024-06-21 16:24:43,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:43,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1286410703, now seen corresponding path program 1 times [2024-06-21 16:24:43,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:43,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041126112] [2024-06-21 16:24:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:43,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:44,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:44,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041126112] [2024-06-21 16:24:44,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041126112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:44,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:44,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:44,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289510730] [2024-06-21 16:24:44,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:44,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:44,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:45,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:24:45,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 635 transitions, 7386 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 16:24:45,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:45,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:24:45,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:47,794 INFO L124 PetriNetUnfolderBase]: 5427/8182 cut-off events. [2024-06-21 16:24:47,795 INFO L125 PetriNetUnfolderBase]: For 2907951/2907953 co-relation queries the response was YES. [2024-06-21 16:24:47,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84902 conditions, 8182 events. 5427/8182 cut-off events. For 2907951/2907953 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 46812 event pairs, 1129 based on Foata normal form. 6/8188 useless extension candidates. Maximal degree in co-relation 84677. Up to 7249 conditions per place. [2024-06-21 16:24:47,933 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 426 selfloop transitions, 257 changer transitions 0/686 dead transitions. [2024-06-21 16:24:47,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 686 transitions, 9694 flow [2024-06-21 16:24:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 16:24:47,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 16:24:47,935 INFO L175 Difference]: Start difference. First operand has 454 places, 635 transitions, 7386 flow. Second operand 10 states and 188 transitions. [2024-06-21 16:24:47,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 686 transitions, 9694 flow [2024-06-21 16:24:56,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 686 transitions, 9158 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 16:24:56,467 INFO L231 Difference]: Finished difference. Result has 457 places, 647 transitions, 7627 flow [2024-06-21 16:24:56,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6855, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7627, PETRI_PLACES=457, PETRI_TRANSITIONS=647} [2024-06-21 16:24:56,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-21 16:24:56,477 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 647 transitions, 7627 flow [2024-06-21 16:24:56,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 16:24:56,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:56,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:24:56,477 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)] === [2024-06-21 16:24:56,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash -368270545, now seen corresponding path program 2 times [2024-06-21 16:24:56,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:56,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298254864] [2024-06-21 16:24:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:56,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:57,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:57,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298254864] [2024-06-21 16:24:57,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298254864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:57,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:57,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:57,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509680558] [2024-06-21 16:24:57,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:57,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:24:57,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 647 transitions, 7627 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 16:24:57,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:57,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:24:57,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:00,328 INFO L124 PetriNetUnfolderBase]: 5531/8342 cut-off events. [2024-06-21 16:25:00,329 INFO L125 PetriNetUnfolderBase]: For 3227810/3227812 co-relation queries the response was YES. [2024-06-21 16:25:00,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86807 conditions, 8342 events. 5531/8342 cut-off events. For 3227810/3227812 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 47907 event pairs, 1174 based on Foata normal form. 30/8372 useless extension candidates. Maximal degree in co-relation 86581. Up to 7446 conditions per place. [2024-06-21 16:25:00,469 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 447 selfloop transitions, 246 changer transitions 0/696 dead transitions. [2024-06-21 16:25:00,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 696 transitions, 9560 flow [2024-06-21 16:25:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:25:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:25:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-21 16:25:00,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 16:25:00,470 INFO L175 Difference]: Start difference. First operand has 457 places, 647 transitions, 7627 flow. Second operand 12 states and 219 transitions. [2024-06-21 16:25:00,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 696 transitions, 9560 flow [2024-06-21 16:25:08,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 696 transitions, 9157 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-21 16:25:08,334 INFO L231 Difference]: Finished difference. Result has 464 places, 650 transitions, 7803 flow [2024-06-21 16:25:08,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7224, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7803, PETRI_PLACES=464, PETRI_TRANSITIONS=650} [2024-06-21 16:25:08,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-21 16:25:08,334 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 650 transitions, 7803 flow [2024-06-21 16:25:08,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 16:25:08,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:08,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:08,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:25:08,335 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)] === [2024-06-21 16:25:08,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:08,335 INFO L85 PathProgramCache]: Analyzing trace with hash -368280775, now seen corresponding path program 3 times [2024-06-21 16:25:08,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:08,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781400342] [2024-06-21 16:25:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:08,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:09,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:09,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781400342] [2024-06-21 16:25:09,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781400342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:09,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:09,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:25:09,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478873981] [2024-06-21 16:25:09,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:09,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:25:09,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:09,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:25:09,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:25:09,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:25:09,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 650 transitions, 7803 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 16:25:09,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:09,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:25:09,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:12,126 INFO L124 PetriNetUnfolderBase]: 5547/8366 cut-off events. [2024-06-21 16:25:12,126 INFO L125 PetriNetUnfolderBase]: For 2990099/2990101 co-relation queries the response was YES. [2024-06-21 16:25:12,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87807 conditions, 8366 events. 5547/8366 cut-off events. For 2990099/2990101 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 48082 event pairs, 1172 based on Foata normal form. 6/8372 useless extension candidates. Maximal degree in co-relation 87579. Up to 7422 conditions per place. [2024-06-21 16:25:12,264 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 444 selfloop transitions, 252 changer transitions 0/699 dead transitions. [2024-06-21 16:25:12,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 699 transitions, 9750 flow [2024-06-21 16:25:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:25:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:25:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 16:25:12,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:25:12,265 INFO L175 Difference]: Start difference. First operand has 464 places, 650 transitions, 7803 flow. Second operand 11 states and 209 transitions. [2024-06-21 16:25:12,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 699 transitions, 9750 flow [2024-06-21 16:25:21,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 699 transitions, 9241 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 16:25:21,390 INFO L231 Difference]: Finished difference. Result has 465 places, 653 transitions, 7889 flow [2024-06-21 16:25:21,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7294, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7889, PETRI_PLACES=465, PETRI_TRANSITIONS=653} [2024-06-21 16:25:21,390 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-21 16:25:21,390 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 653 transitions, 7889 flow [2024-06-21 16:25:21,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 16:25:21,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:21,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:21,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:25:21,390 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)] === [2024-06-21 16:25:21,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash -81382843, now seen corresponding path program 2 times [2024-06-21 16:25:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:21,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164816913] [2024-06-21 16:25:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:21,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:22,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:22,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164816913] [2024-06-21 16:25:22,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164816913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:22,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:22,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:25:22,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354943645] [2024-06-21 16:25:22,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:22,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:25:22,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:22,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:25:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:25:22,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:25:22,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 653 transitions, 7889 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 16:25:22,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:22,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:25:22,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:25,596 INFO L124 PetriNetUnfolderBase]: 5567/8394 cut-off events. [2024-06-21 16:25:25,596 INFO L125 PetriNetUnfolderBase]: For 3026031/3026033 co-relation queries the response was YES. [2024-06-21 16:25:25,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88142 conditions, 8394 events. 5567/8394 cut-off events. For 3026031/3026033 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 48317 event pairs, 1186 based on Foata normal form. 6/8400 useless extension candidates. Maximal degree in co-relation 87913. Up to 7758 conditions per place. [2024-06-21 16:25:25,734 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 493 selfloop transitions, 195 changer transitions 0/691 dead transitions. [2024-06-21 16:25:25,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 691 transitions, 9437 flow [2024-06-21 16:25:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:25:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:25:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-21 16:25:25,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 16:25:25,735 INFO L175 Difference]: Start difference. First operand has 465 places, 653 transitions, 7889 flow. Second operand 12 states and 203 transitions. [2024-06-21 16:25:25,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 691 transitions, 9437 flow [2024-06-21 16:25:35,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 691 transitions, 8929 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 16:25:35,327 INFO L231 Difference]: Finished difference. Result has 470 places, 659 transitions, 7889 flow [2024-06-21 16:25:35,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7383, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7889, PETRI_PLACES=470, PETRI_TRANSITIONS=659} [2024-06-21 16:25:35,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-21 16:25:35,327 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 659 transitions, 7889 flow [2024-06-21 16:25:35,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 16:25:35,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:35,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:35,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:25:35,328 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)] === [2024-06-21 16:25:35,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:35,328 INFO L85 PathProgramCache]: Analyzing trace with hash 650997654, now seen corresponding path program 1 times [2024-06-21 16:25:35,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:35,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905972792] [2024-06-21 16:25:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:35,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:36,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:36,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905972792] [2024-06-21 16:25:36,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905972792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:36,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:36,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:25:36,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601939569] [2024-06-21 16:25:36,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:36,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:25:36,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:25:36,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:25:36,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:25:36,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 659 transitions, 7889 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:36,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:36,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:25:36,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:38,787 INFO L124 PetriNetUnfolderBase]: 5588/8424 cut-off events. [2024-06-21 16:25:38,787 INFO L125 PetriNetUnfolderBase]: For 3049618/3049620 co-relation queries the response was YES. [2024-06-21 16:25:38,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88687 conditions, 8424 events. 5588/8424 cut-off events. For 3049618/3049620 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 48489 event pairs, 1223 based on Foata normal form. 3/8427 useless extension candidates. Maximal degree in co-relation 88456. Up to 8075 conditions per place. [2024-06-21 16:25:38,938 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 578 selfloop transitions, 116 changer transitions 0/697 dead transitions. [2024-06-21 16:25:38,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 697 transitions, 10110 flow [2024-06-21 16:25:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:25:38,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:25:38,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:25:38,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 16:25:38,939 INFO L175 Difference]: Start difference. First operand has 470 places, 659 transitions, 7889 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:25:38,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 697 transitions, 10110 flow [2024-06-21 16:25:48,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 697 transitions, 9645 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-21 16:25:48,727 INFO L231 Difference]: Finished difference. Result has 469 places, 668 transitions, 7803 flow [2024-06-21 16:25:48,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7424, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7803, PETRI_PLACES=469, PETRI_TRANSITIONS=668} [2024-06-21 16:25:48,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-21 16:25:48,728 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 668 transitions, 7803 flow [2024-06-21 16:25:48,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:48,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:48,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:48,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:25:48,728 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)] === [2024-06-21 16:25:48,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash -190603988, now seen corresponding path program 2 times [2024-06-21 16:25:48,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:48,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720494916] [2024-06-21 16:25:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:48,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:49,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:49,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720494916] [2024-06-21 16:25:49,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720494916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:49,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:49,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:25:49,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656573582] [2024-06-21 16:25:49,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:49,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:25:49,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:49,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:25:49,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:25:49,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:25:49,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 668 transitions, 7803 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:49,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:49,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:25:49,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:52,016 INFO L124 PetriNetUnfolderBase]: 5609/8453 cut-off events. [2024-06-21 16:25:52,016 INFO L125 PetriNetUnfolderBase]: For 3111615/3111617 co-relation queries the response was YES. [2024-06-21 16:25:52,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89000 conditions, 8453 events. 5609/8453 cut-off events. For 3111615/3111617 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48649 event pairs, 1214 based on Foata normal form. 3/8456 useless extension candidates. Maximal degree in co-relation 88769. Up to 8099 conditions per place. [2024-06-21 16:25:52,161 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 563 selfloop transitions, 139 changer transitions 0/705 dead transitions. [2024-06-21 16:25:52,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 705 transitions, 10060 flow [2024-06-21 16:25:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:25:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:25:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:25:52,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:25:52,162 INFO L175 Difference]: Start difference. First operand has 469 places, 668 transitions, 7803 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:25:52,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 705 transitions, 10060 flow [2024-06-21 16:26:01,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 705 transitions, 9744 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 16:26:01,748 INFO L231 Difference]: Finished difference. Result has 470 places, 677 transitions, 7930 flow [2024-06-21 16:26:01,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7505, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7930, PETRI_PLACES=470, PETRI_TRANSITIONS=677} [2024-06-21 16:26:01,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-21 16:26:01,748 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 677 transitions, 7930 flow [2024-06-21 16:26:01,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:01,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:01,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:01,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:26:01,749 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)] === [2024-06-21 16:26:01,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:01,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1552261327, now seen corresponding path program 1 times [2024-06-21 16:26:01,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:01,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983005466] [2024-06-21 16:26:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:01,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:02,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983005466] [2024-06-21 16:26:02,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983005466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:02,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:02,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:26:02,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043307368] [2024-06-21 16:26:02,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:02,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:26:02,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:02,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:26:02,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:26:02,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:26:02,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 677 transitions, 7930 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:02,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:02,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:26:02,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:05,072 INFO L124 PetriNetUnfolderBase]: 5629/8481 cut-off events. [2024-06-21 16:26:05,072 INFO L125 PetriNetUnfolderBase]: For 3188707/3188709 co-relation queries the response was YES. [2024-06-21 16:26:05,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89486 conditions, 8481 events. 5629/8481 cut-off events. For 3188707/3188709 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 48823 event pairs, 1107 based on Foata normal form. 4/8485 useless extension candidates. Maximal degree in co-relation 89255. Up to 8066 conditions per place. [2024-06-21 16:26:05,214 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 644 selfloop transitions, 64 changer transitions 0/711 dead transitions. [2024-06-21 16:26:05,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 711 transitions, 9530 flow [2024-06-21 16:26:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:26:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:26:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:26:05,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 16:26:05,215 INFO L175 Difference]: Start difference. First operand has 470 places, 677 transitions, 7930 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:26:05,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 711 transitions, 9530 flow [2024-06-21 16:26:15,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 711 transitions, 9199 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-21 16:26:15,306 INFO L231 Difference]: Finished difference. Result has 471 places, 681 transitions, 7846 flow [2024-06-21 16:26:15,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7599, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7846, PETRI_PLACES=471, PETRI_TRANSITIONS=681} [2024-06-21 16:26:15,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-21 16:26:15,307 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 681 transitions, 7846 flow [2024-06-21 16:26:15,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:15,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:15,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:15,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:26:15,307 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)] === [2024-06-21 16:26:15,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:15,307 INFO L85 PathProgramCache]: Analyzing trace with hash 645785004, now seen corresponding path program 3 times [2024-06-21 16:26:15,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:15,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556675545] [2024-06-21 16:26:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:15,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:15,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:15,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556675545] [2024-06-21 16:26:15,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556675545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:15,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:15,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062524210] [2024-06-21 16:26:15,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:15,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:16,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:26:16,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 681 transitions, 7846 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:16,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:16,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:26:16,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:18,492 INFO L124 PetriNetUnfolderBase]: 5642/8499 cut-off events. [2024-06-21 16:26:18,492 INFO L125 PetriNetUnfolderBase]: For 3202722/3202724 co-relation queries the response was YES. [2024-06-21 16:26:18,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90280 conditions, 8499 events. 5642/8499 cut-off events. For 3202722/3202724 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 48934 event pairs, 1213 based on Foata normal form. 3/8502 useless extension candidates. Maximal degree in co-relation 90052. Up to 8142 conditions per place. [2024-06-21 16:26:18,631 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 563 selfloop transitions, 146 changer transitions 0/712 dead transitions. [2024-06-21 16:26:18,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 712 transitions, 10030 flow [2024-06-21 16:26:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:26:18,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 16:26:18,632 INFO L175 Difference]: Start difference. First operand has 471 places, 681 transitions, 7846 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:26:18,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 712 transitions, 10030 flow [2024-06-21 16:26:27,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 712 transitions, 9811 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 16:26:27,656 INFO L231 Difference]: Finished difference. Result has 472 places, 687 transitions, 7997 flow [2024-06-21 16:26:27,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7627, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7997, PETRI_PLACES=472, PETRI_TRANSITIONS=687} [2024-06-21 16:26:27,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-21 16:26:27,657 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 687 transitions, 7997 flow [2024-06-21 16:26:27,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:27,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:27,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:27,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:26:27,657 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)] === [2024-06-21 16:26:27,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:27,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1003354932, now seen corresponding path program 4 times [2024-06-21 16:26:27,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:27,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897189544] [2024-06-21 16:26:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:27,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:28,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:28,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897189544] [2024-06-21 16:26:28,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897189544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:28,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:28,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:26:28,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246939704] [2024-06-21 16:26:28,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:28,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:26:28,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:26:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:26:28,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:26:28,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 687 transitions, 7997 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:28,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:28,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:26:28,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:31,198 INFO L124 PetriNetUnfolderBase]: 5647/8506 cut-off events. [2024-06-21 16:26:31,198 INFO L125 PetriNetUnfolderBase]: For 3242715/3242717 co-relation queries the response was YES. [2024-06-21 16:26:31,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90464 conditions, 8506 events. 5647/8506 cut-off events. For 3242715/3242717 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 48938 event pairs, 1213 based on Foata normal form. 3/8509 useless extension candidates. Maximal degree in co-relation 90235. Up to 8148 conditions per place. [2024-06-21 16:26:31,347 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 583 selfloop transitions, 135 changer transitions 0/721 dead transitions. [2024-06-21 16:26:31,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 721 transitions, 10182 flow [2024-06-21 16:26:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:26:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:26:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 16:26:31,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-21 16:26:31,348 INFO L175 Difference]: Start difference. First operand has 472 places, 687 transitions, 7997 flow. Second operand 11 states and 185 transitions. [2024-06-21 16:26:31,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 721 transitions, 10182 flow [2024-06-21 16:26:40,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 721 transitions, 9964 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 16:26:40,883 INFO L231 Difference]: Finished difference. Result has 479 places, 690 transitions, 8092 flow [2024-06-21 16:26:40,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7782, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8092, PETRI_PLACES=479, PETRI_TRANSITIONS=690} [2024-06-21 16:26:40,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-21 16:26:40,883 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 690 transitions, 8092 flow [2024-06-21 16:26:40,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:40,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:40,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:40,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:26:40,883 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)] === [2024-06-21 16:26:40,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash -723055325, now seen corresponding path program 2 times [2024-06-21 16:26:40,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:40,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043836339] [2024-06-21 16:26:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:40,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:41,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:41,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043836339] [2024-06-21 16:26:41,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043836339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:41,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:41,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:26:41,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103873916] [2024-06-21 16:26:41,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:41,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:26:41,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:41,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:26:41,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:26:41,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:26:41,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 690 transitions, 8092 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:41,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:41,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:26:41,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:44,146 INFO L124 PetriNetUnfolderBase]: 5715/8600 cut-off events. [2024-06-21 16:26:44,146 INFO L125 PetriNetUnfolderBase]: For 3402004/3402006 co-relation queries the response was YES. [2024-06-21 16:26:44,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92787 conditions, 8600 events. 5715/8600 cut-off events. For 3402004/3402006 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49537 event pairs, 1116 based on Foata normal form. 4/8604 useless extension candidates. Maximal degree in co-relation 92557. Up to 7833 conditions per place. [2024-06-21 16:26:44,290 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 594 selfloop transitions, 144 changer transitions 0/741 dead transitions. [2024-06-21 16:26:44,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 741 transitions, 10680 flow [2024-06-21 16:26:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:26:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:26:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:26:44,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 16:26:44,291 INFO L175 Difference]: Start difference. First operand has 479 places, 690 transitions, 8092 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:26:44,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 741 transitions, 10680 flow [2024-06-21 16:26:53,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 741 transitions, 10400 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:26:53,903 INFO L231 Difference]: Finished difference. Result has 481 places, 710 transitions, 8538 flow [2024-06-21 16:26:53,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7812, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8538, PETRI_PLACES=481, PETRI_TRANSITIONS=710} [2024-06-21 16:26:53,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-21 16:26:53,904 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 710 transitions, 8538 flow [2024-06-21 16:26:53,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:53,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:53,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:53,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 16:26:53,904 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)] === [2024-06-21 16:26:53,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash 651326347, now seen corresponding path program 1 times [2024-06-21 16:26:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:53,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664310749] [2024-06-21 16:26:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:53,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:54,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:54,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664310749] [2024-06-21 16:26:54,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664310749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:54,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:54,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:26:54,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723263945] [2024-06-21 16:26:54,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:54,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:26:54,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:54,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:26:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:26:54,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:26:54,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 710 transitions, 8538 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:54,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:54,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:26:54,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:57,401 INFO L124 PetriNetUnfolderBase]: 5825/8752 cut-off events. [2024-06-21 16:26:57,401 INFO L125 PetriNetUnfolderBase]: For 3611871/3611873 co-relation queries the response was YES. [2024-06-21 16:26:57,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97365 conditions, 8752 events. 5825/8752 cut-off events. For 3611871/3611873 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 50459 event pairs, 1169 based on Foata normal form. 8/8760 useless extension candidates. Maximal degree in co-relation 97132. Up to 7644 conditions per place. [2024-06-21 16:26:57,744 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 557 selfloop transitions, 211 changer transitions 0/771 dead transitions. [2024-06-21 16:26:57,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 771 transitions, 11235 flow [2024-06-21 16:26:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:26:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:26:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:26:57,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 16:26:57,745 INFO L175 Difference]: Start difference. First operand has 481 places, 710 transitions, 8538 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:26:57,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 771 transitions, 11235 flow [2024-06-21 16:27:06,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 771 transitions, 11037 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-21 16:27:06,498 INFO L231 Difference]: Finished difference. Result has 489 places, 734 transitions, 9237 flow [2024-06-21 16:27:06,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8340, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9237, PETRI_PLACES=489, PETRI_TRANSITIONS=734} [2024-06-21 16:27:06,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-21 16:27:06,499 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 734 transitions, 9237 flow [2024-06-21 16:27:06,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:06,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:06,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:06,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 16:27:06,499 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)] === [2024-06-21 16:27:06,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:06,499 INFO L85 PathProgramCache]: Analyzing trace with hash -998706389, now seen corresponding path program 2 times [2024-06-21 16:27:06,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:06,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45099313] [2024-06-21 16:27:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:06,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:07,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:07,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45099313] [2024-06-21 16:27:07,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45099313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:07,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:07,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:27:07,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584733907] [2024-06-21 16:27:07,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:07,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:27:07,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:27:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:27:07,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:27:07,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 734 transitions, 9237 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:07,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:07,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:27:07,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:10,071 INFO L124 PetriNetUnfolderBase]: 5903/8860 cut-off events. [2024-06-21 16:27:10,072 INFO L125 PetriNetUnfolderBase]: For 3743878/3743880 co-relation queries the response was YES. [2024-06-21 16:27:10,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100730 conditions, 8860 events. 5903/8860 cut-off events. For 3743878/3743880 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 51066 event pairs, 1172 based on Foata normal form. 8/8868 useless extension candidates. Maximal degree in co-relation 100492. Up to 7699 conditions per place. [2024-06-21 16:27:10,232 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 568 selfloop transitions, 208 changer transitions 0/779 dead transitions. [2024-06-21 16:27:10,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 779 transitions, 12173 flow [2024-06-21 16:27:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:27:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:27:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 16:27:10,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 16:27:10,234 INFO L175 Difference]: Start difference. First operand has 489 places, 734 transitions, 9237 flow. Second operand 9 states and 169 transitions. [2024-06-21 16:27:10,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 779 transitions, 12173 flow [2024-06-21 16:27:19,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 779 transitions, 11818 flow, removed 136 selfloop flow, removed 3 redundant places. [2024-06-21 16:27:19,382 INFO L231 Difference]: Finished difference. Result has 495 places, 742 transitions, 9548 flow [2024-06-21 16:27:19,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8984, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9548, PETRI_PLACES=495, PETRI_TRANSITIONS=742} [2024-06-21 16:27:19,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-21 16:27:19,383 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 742 transitions, 9548 flow [2024-06-21 16:27:19,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:19,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:19,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:19,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 16:27:19,383 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)] === [2024-06-21 16:27:19,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:19,383 INFO L85 PathProgramCache]: Analyzing trace with hash 655967791, now seen corresponding path program 3 times [2024-06-21 16:27:19,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:19,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760129769] [2024-06-21 16:27:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:19,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:20,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:20,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760129769] [2024-06-21 16:27:20,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760129769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:20,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:20,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:27:20,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855517589] [2024-06-21 16:27:20,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:20,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:27:20,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:27:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:27:20,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:27:20,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 742 transitions, 9548 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:20,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:20,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:27:20,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:23,010 INFO L124 PetriNetUnfolderBase]: 5923/8888 cut-off events. [2024-06-21 16:27:23,010 INFO L125 PetriNetUnfolderBase]: For 3753951/3753953 co-relation queries the response was YES. [2024-06-21 16:27:23,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100885 conditions, 8888 events. 5923/8888 cut-off events. For 3753951/3753953 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 51207 event pairs, 1123 based on Foata normal form. 4/8892 useless extension candidates. Maximal degree in co-relation 100644. Up to 8109 conditions per place. [2024-06-21 16:27:23,165 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 625 selfloop transitions, 146 changer transitions 0/774 dead transitions. [2024-06-21 16:27:23,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 774 transitions, 11938 flow [2024-06-21 16:27:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:27:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:27:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:27:23,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 16:27:23,166 INFO L175 Difference]: Start difference. First operand has 495 places, 742 transitions, 9548 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:27:23,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 774 transitions, 11938 flow [2024-06-21 16:27:33,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 774 transitions, 11550 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 16:27:33,621 INFO L231 Difference]: Finished difference. Result has 499 places, 746 transitions, 9537 flow [2024-06-21 16:27:33,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9160, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9537, PETRI_PLACES=499, PETRI_TRANSITIONS=746} [2024-06-21 16:27:33,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-21 16:27:33,621 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 746 transitions, 9537 flow [2024-06-21 16:27:33,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:33,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:33,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:33,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 16:27:33,622 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)] === [2024-06-21 16:27:33,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:33,622 INFO L85 PathProgramCache]: Analyzing trace with hash -998713302, now seen corresponding path program 5 times [2024-06-21 16:27:33,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:33,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140610010] [2024-06-21 16:27:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:33,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15